A.
Purpose.
1.
The
state legislature has found:
(a)
That the waters of the state are of limited supply and are subject
to ever increasing demands;
(b)
That the continuation of California's economic prosperity is dependent
on the availability of adequate supplies of water for future uses;
(c)
That it is the policy of the State to promote the conservation and
efficient use of water and to prevent the waste of this valuable resource;
(d)
That landscapes are essential to the quality of life in California
by providing areas for active and passive recreation and as an enhancement
to the environment by cleaning air and water, preventing erosion,
offering fire protection, and replacing ecosystems lost to development;
and
(e)
That landscape design, installation, maintenance and management can
and should be water efficient; and
(f)
That Section 2 of Article X of the California Constitution specifies
that the right to use water is limited to the amount reasonably required
for the beneficial use to be served and the right does not and shall
not extend to waste or unreasonable method of use.
2.
Consistent
with these legislative findings, the purpose of this chapter is to:
(a)
Promote the values and benefits of landscapes while recognizing the
need to invest water and other resources as efficiently as possible;
(b)
Establish a structure for planning, designing, installing, maintaining
and managing water efficient landscapes in new construction and rehabilitated
projects;
(c)
Establish provisions for water management practices and water waste
prevention for existing landscapes;
(d)
Use water efficiently without waste by setting a maximum applied
water allowance as an upper limit for water use and reduce water use
to the lowest practical amount;
(e)
Promote the benefits of consistent landscape ordinances with neighboring
local and regional agencies;
(f)
Encourage the use of economic incentives that promote the efficient
use of water, such as implementing a tiered-rate structure; and
(g)
Encourage cooperation between the city of Crescent City and other
local agencies to implement and enforce the provisions of the water
efficient landscape ordinance.
State law reference—Authority cited: Section
65593, Government Code. Reference: Sections 65591, 65593, 65596, Government
Code.
B.
Applicability.
1.
After
January 1, 2010, this chapter shall apply to all of the following
landscape projects:
(a)
New construction and rehabilitated landscapes for public agency projects
and private development projects with a landscape area equal to or
greater than two thousand five hundred square feet requiring a building
or landscape permit, plan check or design review;
(b)
New construction and rehabilitated landscapes which are developer-installed
in single-family and multifamily projects with a landscape area equal
to or greater than two thousand five hundred square feet requiring
a building or landscape permit, plan check, or design review;
(c)
New construction landscapes which are homeowner-provided and/or homeowner-hired
in single-family and multifamily residential projects with a total
project landscape area equal to or greater than five thousand square
feet requiring a building or landscape permit, plan check or design
review;
(d)
Existing landscapes limited to Sections 17.41.10(V), 17.41.10(W)
and 17.41.10(X); and
(e)
Cemeteries. Recognizing the special landscape management needs of
cemeteries, new and rehabilitated cemeteries are limited to Sections
17.41.10(H), 17.41.10(O) and 17.41.10(P); and existing cemeteries
are limited to Sections 17.41.10(V), 17.41.10(W) and 17.41.10(X)
2.
This
chapter does not apply to:
(a)
Registered local, state or federal historical sites;
(b)
Ecological restoration projects that do not require a permanent irrigation
system;
(c)
Mined-land reclamation projects that do not require a permanent irrigation
system; or
(d)
Plant collections, as part of botanical gardens and arboretums open
to the public.
Note—Authority Cited: Section 65595, Government
Code.
State law reference—Reference: Section 65596,
Government Code.
C.
"Applied water"
"Automatic irrigation controller"
"Backflow prevention device"
"Certificate of completion"
"Certified irrigation designer"
"Certified landscape irrigation auditor"
"Check valve" or "anti-drain valve"
"Common interest developments"
"Conversion factor (0.62)"
"Drip irrigation"
"Ecological restoration project"
"Effective precipitation" or "usable rainfall" (Eppt)
"Emitter"
"Established landscape"
"Establishment period of the plants"
"Estimated total water use (ETWU)"
"ET adjustment factor (ETAF)"
"Evapotranspiration rate"
"Flow rate"
"Hardscapes"
"Homeowner-provided landscaping"
"Hydrozone"
"Infiltration rate"
"Invasive plant species"
"Irrigation audit"
"Irrigation efficiency" (IE)
"Irrigation survey"
"Irrigation water use analysis"
"Landscape architect"
"Landscape area"
"Landscape contractor"
"Landscape documentation package"
"Landscape project"
"Lateral line"
"Local water purveyor"
"Low volume irrigation"
"Main line"
"Maximum applied water allowance (MAWA)"
"Microclimate"
"Mined-land reclamation projects"
"Mulch"
"New construction"
"Operating pressure"
"Overhead sprinkler irrigation systems"
"Overspray"
"Permit"
"Pervious"
"Plant factor" or "plant water use factor"
"Precipitation rate"
"Project applicant"
"Rain sensor" or "rain sensing shutoff device"
"Record drawing" or "as-builts"
"Recreational area"
"Recycled water", "reclaimed water", or "treated sewage effluent
water"
"Reference evapotranspiration" or "ETo"
"Rehabilitated landscape"
"Runoff"
"Soil moisture sensing device" or "soil moisture sensor"
"Soil texture"
"Special landscape area" (SLA)
"Sprinkler head"
"Static water pressure"
"Station"
"Swing joint"
"Turf"
"Valve"
"Water conserving plant species"
"Water feature"
"Watering window"
"WUCOLS"
Definitions.
The terms used in this chapter have the meaning set forth below:
means the portion of water supplied by the irrigation system
to the landscape.
means an automatic timing device used to remotely control
valves that operate an irrigation system. Automatic irrigation controllers
schedule irrigation events using either evapotranspiration (weather-based)
or soil moisture data.
means a safety device used to prevent pollution or contamination
of the water supply due to the reverse flow of water from the irrigation
system.
means the document required under Section 17.41.10(M)
means a person certified to design irrigation systems by
an accredited academic institution a professional trade organization
or other program such as the U.S. Environmental Protection Agency's
WaterSense irrigation designer certification program and irrigation
association's certified irrigation designer program.
means a person certified to perform landscape irrigation
audits by an accredited academic institution, a professional trade
organization or other program such as the U.S. Environmental Protection
Agency's WaterSense irrigation auditor certification program and irrigation
association's certified landscape irrigation auditor program.
means a valve located under a sprinkler head, or other location
in the irrigation system, to hold water in the system to prevent drainage
from sprinkler heads when the sprinkler is off.
means community apartment projects, condominium projects,
planned developments, and stock cooperatives per Civil Code Section
1351.
means the number that converts acre-inches per acre per year
to gallons per square foot per year.
means any non-spray low volume irrigation system utilizing
emission devices with a flow rate measured in gallons per hour. Low
volume irrigation systems are specifically designed to apply small
volumes of water slowly at or near the root zone of plants.
means a project where the site is intentionally altered to
establish a defined, indigenous, historic ecosystem.
means the portion of total precipitation which becomes available
for plant growth.
means a drip irrigation emission device that delivers water
slowly from the system to the soil.
means the point at which plants in the landscape have developed
significant root growth into the soil. Typically, most plants are
established after one or two years of growth.
means the first year after installing the plant in the landscape
or the first two years if irrigation will be terminated after establishment.
Typically, most plants are established after one or two years of growth.
means the total water used for the landscape as described
in Section 17.41.10(H)
means a factor of 0.7, that, when applied to reference evapotranspiration,
adjusts for plant factors and irrigation efficiency, two major influences
upon the amount of water that needs to be applied to the landscape.
A combined plant mix with a site-wide average of 0.5 is the basis
of the plant factor portion of this calculation. For purposes of the
ETAF, the average irrigation efficiency is 0.71. Therefore, the ET
Adjustment Factor is (0.7)=(0.5/0.71). ETAF for a Special Landscape
Area shall not exceed 1.0. ETAF for existing non-rehabilitated landscapes
is 0.8.
means the quantity of water evaporated from adjacent soil
and other surfaces and transpired by plants during a specified time.
means the rate at which water flows through pipes, valves
and emission devices, measured in gallons per minute, gallons per
hour, or cubic feet per second.
means any durable material (pervious and non-pervious)
means any landscaping either installed by a private individual
for a single-family residence or installed by a licensed contractor
hired by a homeowner. A homeowner, for purposes of this chapter, is
a person who occupies the dwelling he or she owns. This excludes speculative
homes, which are not owner-occupied dwellings.
means a portion of the landscaped area having plants with
similar water needs. A hydrozone may be irrigated or non-irrigated.
means the rate of water entry into the soil expressed as
a depth of water per unit of time (e.g., inches per hour)
means species of plants not historically found in California
that spread outside cultivated areas and can damage environmental
or economic resources. Invasive species may be regulated by county
agricultural agencies as noxious species. "Noxious weeds" means any
weed designated by the weed control regulations in the Weed Control
Act and identified on a regional district noxious weed control list.
Lists of invasive plants are maintained at the California Invasive
Plant Inventory and U.S.D.A. invasive and noxious weeds database.
means an in-depth evaluation of the performance of an irrigation
system conducted by a certified landscape irrigation auditor. An irrigation
audit includes, but is not limited to: inspection, system tune-up,
system test with distribution uniformity or emission uniformity, reporting
overspray or runoff that causes overland flow, and preparation of
an irrigation schedule.
means the measurement of the amount of water beneficially
used divided by the amount of water applied. Irrigation efficiency
is derived from measurements and estimates of irrigation system characteristics
and management practices. The minimum average irrigation efficiency
for purposes of this chapter is 0.71. Greater irrigation efficiency
can be expected from well designed and maintained systems.
means an evaluation of an irrigation system that is less
detailed than an irrigation audit. An irrigation survey includes,
but is not limited to: inspection, system test, and written recommendations
to improve performance of the irrigation system.
means an analysis of water use data based on meter readings
and billing data.
means a person who holds a license to practice landscape
architecture in the state of California Business and Professions Code,
Section 5615.
means all the planting areas, turf areas, and water features
in a landscape design plan subject to the maximum applied water allowance
calculation. The landscape area does not include footprints of buildings
or structures, sidewalks, driveways, parking lots, decks, patios,
gravel or stone walks, other pervious or non-pervious hardscapes,
and other non-irrigated areas designated for non-development (e.g.,
open spaces and existing native vegetation)
means a person licensed by the state of California to construct,
maintain, repair, install, or subcontract the development of landscape
systems.
means the documents required under Section 17.41.10(G)
means total area of landscape in a project as defined in
"landscape area" for the purposes of this chapter, meeting requirements
under Section 17.41.10(B)
means the water delivery pipeline that supplies water to
the emitters or sprinklers from the valve.
means any entity, including a public agency, city, county,
or private water company that provides retail water service.
means the application of irrigation water at low pressure
through a system of tubing or lateral lines and low-volume emitters
such as drip, drip lines, and bubblers. Low volume irrigation systems
are specifically designed to apply small volumes of water slowly at
or near the root zone of plants.
means the pressurized pipeline that delivers water from the
water source to the valve or outlet.
means the upper limit of annual applied water for the established
landscaped area as specified in Section 17.41.10(H). It is based upon
the area's reference evapotranspiration, the ET adjustment factor,
and the size of the landscape area. The estimated total water use
shall not exceed the maximum applied water allowance. Special landscape
areas, including recreation areas, areas permanently and solely dedicated
to edible plants such as orchards and vegetable gardens, and areas
irrigated with recycled water are subject to the MAWA with an ETAF
not to exceed 1.0.
means the climate of a small, specific area that may contrast
with the climate of the overall landscape area due to factors such
as wind, sun exposure, plant density, or proximity to reflective surfaces.
means any surface mining operation with a reclamation plan
approved in accordance with the Surface Mining and Reclamation Act
of 1975.
means any organic material such as leaves, bark, straw, compost,
or inorganic mineral materials such as rocks, gravel, and decomposed
granite left loose and applied to the soil surface for the beneficial
purposes of reducing evaporation, suppressing weeds, moderating soil
temperature, and preventing soil erosion.
means, for the purposes of this chapter, a new building with
a landscape or other new landscape, such as a park, playground, or
greenbelt without an associated building.
means the pressure at which the parts of an irrigation system
are designed by the manufacturer to operate.
means systems that deliver water through the air (e.g., spray
heads and rotors)
means the irrigation water which is delivered beyond the
target area.
means an authorizing document issued by local agencies for
new construction or rehabilitated landscapes.
means any surface or material that allows the passage of
water through the material and into the underlying soil.
is a factor, when multiplied by ETo, estimates the amount
of water needed by plants. For purposes of this chapter, the plant
factor range for low water use plants is 0 to 0.3, the plant factor
range for moderate water use plants is 0.4 to 0.6, and the plant factor
range for high water use plants is 0.7 to 1.0. Plant factors cited
in this chapter are derived from the Department of Water Resources
2000 publication "Water Use Classification of Landscape Species".
means the rate of application of water measured in inches
per hour.
means the individual or entity submitting a landscape documentation
package required under Section 17.41.10(G), to request a permit, plan
check, or design review from the city of Crescent City. A project
applicant may be the property owner or his or her designee.
means a component which automatically suspends an irrigation
event when it rains.
means a set of reproducible drawings which show significant
changes in the work made during construction and which are usually
based on drawings marked up in the field and other data furnished
by the contractor.
means areas dedicated to active play such as parks, sports
fields, and golf courses where turf provides a playing surface.
means treated or recycled waste water of a quality suitable
for non-potable uses such as landscape irrigation and water features.
This water is not intended for human consumption.
means a standard measurement of environmental parameters
which affect the water use of plants. ETo is expressed in inches per
day, month, or year as represented in Appendix A, and is an estimate
of the evapotranspiration of a large field of four- to seven-inch
tall, cool-season grass that is well watered. Reference evapotranspiration
is used as the basis of determining the maximum applied water allowance
so that regional differences in climate can be accommodated.
means any re-landscaping project that requires a permit,
plan check, or design review, meets the requirements of Section 17.41.10(B),
and the modified landscape area is equal to or greater than two thousand
five hundred square feet, is fifty percent of the total landscape
area, and the modifications are completed within one year.
means water which is not absorbed by the soil or landscape
to which it is applied and flows from the landscape area. For example,
runoff may result from water that is applied at too great a rate (application
rate exceeds infiltration rate) or when there is a slope.
means a device that measures the amount of water in the soil.
The device may also suspend or initiate an irrigation event.
means the classification of soil based on its percentage
of sand, silt, and clay.
means an area of the landscape dedicated solely to edible
plants, areas irrigated with recycled water, water features using
recycled water and areas dedicated to active play such as parks, sports
fields, golf courses, and where turf provides a playing surface.
means a device which delivers water through a nozzle.
means the pipeline or municipal water supply pressure when
water is not flowing.
means an area served by one valve or by a set of valves that
operate simultaneously.
means an irrigation component that provides a flexible, leak-free
connection between the emission device and lateral pipeline to allow
movement in any direction and to prevent equipment damage.
means a ground cover surface of mowed grass. Annual bluegrass,
Kentucky bluegrass, Perennial ryegrass, Red fescue, and Tall fescue
are cool-season grasses. Bermudagrass, Kikuyugrass, Seashore Paspalum,
St. Augustinegrass, Zoysiagrass, and Buffalo grass are warm-season
grasses.
means a device used to control the flow of water in the irrigation
system.
means a plant species identified as having a low plant factor.
means a design element where open water performs an aesthetic
or recreational function. Water features include ponds, lakes, waterfalls,
fountains, artificial streams, spas, and swimming pools (where water
is artificially supplied). The surface area of water features is included
in the high water use hydrozone of the landscape area. Constructed
wetlands used for on-site wastewater treatment or stormwater best
management practices that are not irrigated and used solely for water
treatment or stormwater retention are not water features and, therefore,
are not subject to the water budget calculation.
means the time of day irrigation is allowed.
means the water use classification of landscape species published
by the University of California Cooperative Extension, the Department
of Water Resources and the Bureau of Reclamation, 2000.
|
Note—Authority Cited: Section 65595, Government
Code.
|
|
State law reference—Reference: Sections 65592,
65596, Government Code.
|
D.
Provisions
for New Construction or Rehabilitated Landscapes.
1.
The
city of Crescent City may designate another agency, such as a water
purveyor, to implement some or all of the requirements contained in
this chapter. Local agencies may collaborate with water purveyors
to define each entity's specific responsibilities relating to this
ordinance.
Note—Authority Cited: Section 65595, Government
Code. Reference: Section 65596, Government Code.
E.
Compliance
with landscape documentation package.
1.
Prior
to construction, the city of Crescent City shall:
(a)
Provide the project applicant with the ordinance and procedures for
permits, plan checks, or design reviews;
(b)
Review the landscape documentation package submitted by the project
applicant;
(c)
Approve or deny the landscape documentation package;
(d)
Issue a permit or approve the plan check or design review for the
project applicant; and
(e)
Upon approval of the landscape documentation package, submit a copy
of the water efficient landscape worksheet to the local water purveyor.
2.
Prior
to construction, the project applicant shall:
(a)
Submit a landscape documentation package to the city of Crescent
City.
3.
Upon
approval of the landscape documentation package by the city of Crescent
City, the project applicant shall:
(a)
Receive a permit or approval of the plan check or design review and
record the date of the permit in the certificate of completion;
(b)
Submit a copy of the approved landscape documentation package along
with the record drawings, and any other information to the property
owner or his or her designee; and
(c)
Submit a copy of the water efficient landscape worksheet to the city
of Crescent City.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Reference: Section 65596,
Government Code.
F.
Penalties.
1.
The
city of Crescent City may establish and administer penalties to the
project applicant for noncompliance with the ordinance to the extent
permitted by law.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Reference: Section 65596,
Government Code.
G.
Elements
of the Landscape Documentation Package.
1.
The
landscape documentation package shall include the following six elements:
(a)
Project information;
(i)
Date;
(ii)
Project applicant;
(iii)
Project address (if available, parcel and/or lot number(s));
(iv)
Total landscape area (square feet);
(v)
Project type (e.g., new, rehabilitated, public, private, cemetery,
homeowner-installed);
(vi)
Water supply type (e.g., potable, recycled, well) and identify
the local retail water purveyor if the applicant is not served by
a private well;
(vii)
Checklist of all documents in landscape documentation package;
(viii)
Project contacts to include contact information for the project
applicant and property owner; and
(ix)
Applicant signature and date with statement, "I agree to comply
with the requirements of the water efficient landscape ordinance and
submit a complete landscape documentation package".
(c)
Soil management report;
(d)
Landscape design plan;
(e)
Irrigation design plan; and
(f)
Grading design plan.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Reference: Section 65596,
Government Code.
H.
Water
Efficient Landscape Worksheet.
1.
A
project applicant shall complete the water efficient landscape worksheet
which contains two sections (see sample worksheet in Appendix B):
(a)
A hydrozone information table (see Appendix B, Section A) for the
landscape project; and
(b)
A water budget calculation (see Appendix B, Section B) for the landscape
project. For the calculation of the maximum applied water allowance
and estimated total water use, a project applicant shall use the ETo
values from the reference evapotranspiration table in Appendix A.
For geographic areas not covered in Appendix A, use data from other
cities located nearby in the same reference evapotranspiration zone,
as found in the CIMIS Reference Evapotranspiration Zones Map, Department
of Water Resources, 1999.
2.
Water
budget calculations shall adhere to the following requirements:
(a)
The plant factor used shall be from WUCOLS. The plant factor ranges
from 0 to 0.3 for low water use plants, from 0.4 to 0.6 for moderate
water use plants, and from 0.7 to 1.0 for high water use plants.
(b)
All water features shall be included in the high water use hydrozone
and temporarily irrigated areas shall be included in the low water
use hydrozone.
(c)
All special landscape areas shall be identified and their water use
calculated as described below.
(d)
ETAF for special landscape areas shall not exceed 1.0.
3.
Maximum
applied water allowance.
(a)
The maximum applied water allowance shall be calculated using the
equation:
|
MAWA = (ETo) (0.62) [(0.7 × LA) + (0.3 × SLA)]
|
The example calculations below are hypothetical to demonstrate
proper use of the equations and do not represent an existing and/or
planned landscape project. The ETo values used in these calculations
are from the reference evapotranspiration table in Appendix A, for
planning purposes only. For actual irrigation scheduling, automatic
irrigation controllers are required and shall use current reference
evapotranspiration data, such as from the California Irrigation Management
Information System (CIMIS), other equivalent data, or soil moisture
sensor data.
(i)
Example MAWA calculation: a hypothetical landscape project in
Fresno, CA with an irrigated landscape area of fifty thousand square
feet without any Special Landscape Area (SLA = 0, no edible plants,
recreational areas, or use of recycled water). To calculate MAWA,
the annual reference evapotranspiration value for Fresno is 51.1 inches
as listed in the reference evapotranspiration table in Appendix A.
|
MAWA = (ETo) (0.62) [(0.7 × LA) + (0.3 × SLA)]
|
|
MAWA = Maximum applied water allowance (gallons per year)
|
|
ETo = Reference evapotranspiration (inches per year)
|
|
0.62 = Conversion factor (to gallons)
|
|
0.7 = ET adjustment factor (ETAF)
|
|
LA = Landscape area including SLA (square feet)
|
|
0.3 = Additional water allowance for SLA
|
|
SLA = Special landscape area (square feet)
|
|
MAWA = (51.1 inches) (0.62) [(0.7 × 50,000 square feet)
+ (0.3 × 0)] = 1,108,870 gallons per year
|
|
To convert from gallons per year to hundred-cubic-feet per year:
|
|
= 1,108,870/748 = 1,482 hundred-cubic-feet per year (100 cubic
feet = 748 gallons)
|
(ii)
In this next hypothetical example, the landscape project in
Fresno, CA has the same ETo value of 51.1 inches and a total landscape
area of fifty thousand square feet. Within the fifty thousand square
foot project, there is now a two thousand square foot area planted
with edible plants. This two thousand square foot area is considered
to be a special landscape area.
|
MAWA = (ETo) (0.62) [(0.7 × LA) + (0.3 × SLA)]
|
|
MAWA = (51.1 inches) (0.62) [(0.7 × 50,000 square feet)
+ (0.3 × 2,000 square feet)]
|
|
= 31.68 × [35,000 + 600] gallons per year
|
|
= 31.68 × 35,600 gallons per year
|
|
= 1,127,808 gallons per year or 1,508 hundred-cubic-feet per
year
|
4.
Estimated
total water use.
(a)
The estimated total water use shall be calculated using the equation
below. The sum of the estimated total water use calculated for all
hydrozones shall not exceed MAWA.
|
ETWU = (ETo)(0.62)(PF x HA / IE + SLA)
|
|
Where:
|
|
ETWU = Estimated total water use per year (gallons)
|
|
ETo = Reference evapotranspiration (inches)
|
|
PF = Plant factor from WUCOLS (see Section 491)
|
|
HA = Hydrozone area [high, medium, and low water use areas]
(square feet)
|
|
SLA = Special landscape area (square feet)
|
|
0.62 = Conversion factor
|
|
IE = Irrigation efficiency (minimum 0.71)
|
(i)
Example ETWU calculation: Landscape area is fifty thousand square
feet; plant water use type, plant factor, and hydrozone area are shown
in the table below. The ETo value is 51.1 inches per year. There are
no special landscape areas (recreational area, area permanently and
solely dedicated to edible plants, and area irrigated with recycled
water) in this example.
|
Hydrozone
|
Plant Water Use Type(s)
|
Plant Factor (PF)*
|
Hydrozone Area (HA) (sq. ft.)
|
PF × HA (sq. ft.)
|
|---|---|---|---|---|
|
1
|
High
|
0.8
|
7,000
|
5,600
|
|
2
|
High
|
0.7
|
10,000
|
7,000
|
|
3
|
Medium
|
0.5
|
16,000
|
8,000
|
|
4
|
Low
|
0.3
|
7,000
|
2,100
|
|
5
|
Low
|
0.2
|
10,000
|
2,000
|
|
|
|
|
Sum
|
24,700
|
|
*Plant Factor from WUCOLS
|
|
ETWU = (51.1)(0.62)(24,700 / 0.71+0)
|
|
= 1,102,116 gallons per year
|
|
Compare ETWU with MAWA: For this example MAWA = (51.1) (0.62)
[(0.7 × 50,000) + (0.3 × 0)] = 1,108,870 gallons per year.
The ETWU (1,102,116 gallons per year) is less than MAWA (1,108,870
gallons per year). In this example, the water budget complies with
the MAWA.
|
(ii)
Example ETWU calculation: total landscape area is fifty thousand
square feet, two thousand square feet of which is planted with edible
plants. The edible plant area is considered a special landscape area
(SLA). The reference evapotranspiration value is 51.1 inches per year.
The plant type, plant factor, and hydrozone area are shown in the
table below.
|
Hydrozone
|
Plant Water Use Type(s)
|
Plant Factor (PF)*
|
Hydrozone Area (HA) (sq. ft.)
|
PF × HA (sq. ft.)
|
|---|---|---|---|---|
|
1
|
High
|
0.8
|
7,000
|
5,600
|
|
2
|
High
|
0.7
|
9,000
|
6,300
|
|
3
|
Medium
|
0.5
|
15,000
|
7,500
|
|
4
|
Low
|
0.3
|
7,000
|
2,100
|
|
5
|
Low
|
0.2
|
10,000
|
2,000
|
|
|
|
|
Sum
|
23,500
|
|
6
|
SLA
|
1.0
|
2,000
|
2,000
|
|
*Plant Factor from WUCOLS
|
|
ETWU = (51.1)(0.62)(23,500 / 0.71 + 2,000)
|
|
= (31.68) (33,099 + 2,000)
|
|
= 1,111,936 gallons per year
|
|
Compare ETWU with MAWA. For this example: MAWA = (51.1) (0.62)
[(0.7 × 50,000) + (0.3 × 2,000)]
|
|
= 31.68 × [35,000 + 600]
|
|
= 31.68 × 35,600
|
|
= 1,127,808 gallons per year
|
|
The ETWU (1,111,936 gallons per year) is less than MAWA (1,127,808
gallons per year). For this example, the water budget complies with
the MAWA.
|
Note—Authority Cited: Section 65595,
Government Code.
State law reference—Reference: Section 65596,
Government Code.
I.
Soil Management Report.
1.
In
order to reduce runoff and encourage healthy plant growth, a soil
management report shall be completed by the project applicant, or
his or her designee, as follows:
(a)
Submit soil samples to a laboratory for analysis and recommendations.
(i)
Soil sampling shall be conducted in accordance with laboratory
protocol, including protocols regarding adequate sampling depth for
the intended plants.
(b)
The project applicant, or his or her designee, shall comply with
one of the following:
(i)
If significant mass grading is not planned, the soil analysis
report shall be submitted to the city of Crescent City as part of
the landscape documentation package; or
(ii)
If significant mass grading is planned, the soil analysis report
shall be submitted to the city of Crescent City as part of the certificate
of completion.
(c)
The soil analysis report shall be made available, in a timely manner,
to the professionals preparing the landscape design plans and irrigation
design plans to make any necessary adjustments to the design plans.
(d)
The project applicant, or his or her designee, shall submit documentation
verifying implementation of soil analysis report recommendations to
the city of Crescent City with certificate of completion.
Note—Authority Cited: Section 65595, Government
Code.
State law reference—Reference: Section 65596,
Government Code.
J.
Landscape Design Plan.
1.
For
the efficient use of water, a landscape shall be carefully designed
and planned for the intended function of the project. A landscape
design plan meeting the following design criteria shall be submitted
as part of the landscape documentation package.
(a)
Plant Material.
(i)
Any plant may be selected for the landscape, providing the estimated
total water use in the landscape area does not exceed the maximum
applied water allowance. To encourage the efficient use of water,
the following is highly recommended:
1.
Protection and preservation of native species and natural vegetation;
2.
Selection of water-conserving plant and turf species;
3.
Selection of plants based on disease and pest resistance;
4.
Selection of trees based on applicable tree ordinances or tree
shading guidelines; and
5.
Selection of plants from approved plant lists.
(ii)
Each hydrozone shall have plant materials with similar water
use, with the exception of hydrozones with plants of mixed water use,
as specified in Section 17.41.10(K)(1)(b)(iv).
(iii)
Plants shall be selected and planted appropriately based upon
their adaptability to the climatic, geologic, and topographical conditions
of the project site. To encourage the efficient use of water, the
following is highly recommended:
1.
Use the Sunset Western Climate Zone System which takes into
account temperature, humidity, elevation, terrain, latitude, and varying
degrees of continental and marine influence on local climate;
2.
Recognize the horticultural attributes of plants (i.e., mature
plant size, invasive surface roots) to minimize damage to property
or infrastructure [e.g., buildings, sidewalks, power lines]; and
3.
Consider the solar orientation for plant placement to maximize
summer shade and winter solar gain.
(iv)
Turf is not allowed on slopes greater than twenty-five percent
where the toe of the slope is adjacent to an impermeable hardscape
and where twenty-five percent means one foot of vertical elevation
change for every four feet of horizontal length (rise divided by run
× 100 = slope percent).
(v)
A landscape design plan for projects in fire-prone areas shall
address fire safety and prevention. A defensible space or zone around
a building or structure is required per Public Resources Code Section
4291(a) and (b). Avoid fire-prone plant materials and highly flammable
mulches.
(vi)
The use of invasive and/or noxious plant species is strongly
discouraged.
(vii)
The architectural guidelines of a common interest development,
which include community apartment projects, condominiums, planned
developments, and stock cooperatives, shall not prohibit or include
conditions that have the effect of prohibiting the use of low-water
use plants as a group.
(b)
Water Features.
(i)
Recirculating water systems shall be used for water features.
(ii)
Where available, recycled water shall be used as a source for
decorative water features.
(iii)
Surface area of a water feature shall be included in the high
water use hydrozone area of the water budget calculation.
(iv)
Pool and spa covers are highly recommended.
(c)
Mulch and Amendments.
(i)
A minimum two-inch layer of mulch shall be applied on all exposed
soil surfaces of planting are-as except in turf areas, creeping or
rooting groundcovers, or direct seeding applications where mulch is
contraindicated.
(ii)
Stabilizing mulching products shall be used on slopes.
(iii)
The mulching portion of the seed/mulch slurry in hydro-seeded
applications shall meet the mulching requirement.
(iv)
Soil amendments shall be incorporated according to recommendations
of the soil report and what is appropriate for the plants selected
(see Section 17.41.10(I))
2.
The
landscape design plan, at a minimum, shall:
(a)
Delineate and label each hydrozone by number, letter, or other method;
(b)
Identify each hydrozone as low, moderate, high water, or mixed water
use. Temporarily irrigated areas of the landscape shall be included
in the low water use hydrozone for the water budget calculation;
(c)
Identify recreational areas;
(d)
Identify areas permanently and solely dedicated to edible plants;
(e)
Identify areas irrigated with recycled water;
(f)
Identify type of mulch and application depth;
(g)
Identify soil amendments, type, and quantity;
(h)
Identify type and surface area of water features;
(i)
Identify hardscapes (pervious and non-pervious);
(j)
Identify location and installation details of any applicable stormwater
best management practices that encourage on-site retention and infiltration
of stormwater. Stormwater best management practices are encouraged
in the landscape design plan and examples include, but are not limited
to:
(i)
Infiltration beds, swales, and basins that allow water to collect
and soak into the ground;
(ii)
Constructed wetlands and retention ponds that retain water,
handle excess flow, and filter pollutants; and
(iii)
Pervious or porous surfaces (e.g., permeable pavers or blocks,
pervious or porous concrete, etc.) that minimize runoff.
(k)
Identify any applicable rain harvesting or catchment technologies
(e.g., rain gardens, cisterns, etc.);
(l)
Contain the following statement: "I have complied with the criteria
of the ordinance and applied them for the efficient use of water in
the landscape design plan"; and
(m)
Bear the signature of a licensed landscape architect, licensed landscape contractor, or any other person authorized to design a landscape. (See Sections 5500.1, 5615, 5641, 5641.1, 5641.2, 5641.3, 5641.4, 5641.5, 5641.6, 6701, 7027.5 of the Business and Professions Code, Section 832.27 of Title 16 of the California Code of Regulations, and Section 6721 of the Food and Agriculture Code.)
Note—Authority cited: Section 65595, Government
Code.
State law reference—Reference: Section 65596,
Government Code and Section 1351, Civil Code.
K.
Irrigation Design Plan.
1.
For
the efficient use of water, an irrigation system shall meet all the
requirements listed in this section and the manufacturers' recommendations.
The irrigation system and its related components shall be planned
and designed to allow for proper installation, management, and maintenance.
An irrigation design plan meeting the following design criteria shall
be submitted as part of the landscape documentation package.
(a)
System.
(i)
Dedicated landscape water meters are highly recommended on landscape
areas smaller than five thousand square feet to facilitate water management.
(ii)
Automatic irrigation controllers utilizing either evapotranspiration
or soil moisture sensor data shall be required for irrigation scheduling
in all irrigation systems.
(iii)
The irrigation system shall be designed to ensure that the dynamic
pressure at each emission device is within the manufacturer's recommended
pressure range for optimal performance.
1.
If the static pressure is above or below the required dynamic
pressure of the irrigation system, pressure-regulating devices such
as inline pressure regulators, booster pumps, or other devices shall
be installed to meet the required dynamic pressure of the irrigation
system.
2.
Static water pressure, dynamic or operating pressure, and flow
reading of the water supply shall be measured at the point of connection.
These pressure and flow measurements shall be conducted at the design
stage. If the measurements are not available at the design stage,
the measurements shall be conducted at installation.
(iv)
Sensors (rain, freeze, wind, etc.), either integral or auxiliary,
that suspend or alter irrigation operation during unfavorable weather
conditions shall be required on all irrigation systems, as appropriate.
Irrigation should be avoided during windy or freezing weather or during
rain.
(v)
Manual shut-off valves (such as a gate valve, ball valve, or
butterfly valve) shall be required, as close as possible to the point
of connection of the water supply, to minimize water loss in case
of an emergency (such as a main line break) or routine repair.
(vi)
Backflow prevention devices shall be required to protect the
water supply from contamination by the irrigation system. A project
applicant shall refer the appropriate Municipal Code chapter for additional
backflow prevention requirements.
(vii)
High flow sensors that detect and report high flow conditions
created by system damage or malfunction are recommended.
(viii)
The irrigation system shall be designed to prevent runoff, low
head drainage, overspray, or other similar conditions where irrigation
water flows onto non-targeted areas, such as adjacent property, nonirrigated
areas, hardscapes, roadways, or structures.
(ix)
Relevant information from the soil management plan, such as
soil type and infiltration rate, shall be utilized when designing
irrigation systems.
(x)
The design of the irrigation system shall conform to the hydrozones
of the landscape design plan.
(xi)
The irrigation system must be designed and installed to meet,
at a minimum, the irrigation efficiency criteria as described in Section
17.41.10(H) regarding the maximum applied water allowance.
(xii)
It is highly recommended that the project applicant inquire
with the city of Crescent City about peak water operating demands
(on the water supply system) or water restrictions that may impact
the effectiveness of the irrigation system.
(xiii)
In mulched planting areas, the use of low volume irrigation
is required to maximize water infiltration into the root zone.
(xiv)
Sprinkler heads and other emission devices shall have matched
precipitation rates, unless otherwise directed by the manufacturer's
recommendations.
(xv)
Head to head coverage is recommended. However, sprinkler spacing
shall be designed to achieve the highest possible distribution uniformity
using the manufacturer's recommendations.
(xvi)
Swing joints or other riser-protection components are required
on all risers subject to damage that are adjacent to high traffic
areas.
(xvii)
Check valves or anti-drain valves are required for all irrigation
systems.
(xviii)
Narrow or irregularly shaped areas, including
turf, less than eight feet in width in any direction shall be irrigated
with subsurface irrigation or low volume irrigation system.
(xix)
Overhead irrigation shall not be permitted within twenty-four
inches of any non-permeable surface. Allowable irrigation within the
setback from non-permeable surfaces may include drip, drip line, or
other low flow non-spray technology. The setback area may be planted
or unplanted. The surfacing of the setback may be mulch, gravel, or
other porous material. These restrictions may be modified if:
1.
The landscape area is adjacent to permeable surfacing and no
runoff occurs; or
2.
The adjacent non-permeable surfaces are designed and constructed
to drain entirely to landscaping; or
3.
The irrigation designer specifies an alternative design or technology,
as part of the landscape documentation package and clearly demonstrates
strict adherence to irrigation system design criteria in Section 17.41.10(K)(1)(a)(viii).
Prevention of overspray and runoff must be confirmed during the irrigation
audit.
(xx)
Slopes greater than twenty-five percent shall not be irrigated
with an irrigation system with a precipitation rate exceeding 0.75
inches per hour. This restriction may be modified if the landscape
designer specifies an alternative design or technology, as part of
the landscape documentation package, and clearly demonstrates no runoff
or erosion will occur. Prevention of runoff and erosion must be confirmed
during the irrigation audit.
(b)
Hydrozone.
(i)
Each valve shall irrigate a hydrozone with similar site, slope,
sun exposure, soil conditions, and plant materials with similar water
use.
(ii)
Sprinkler heads and other emission devices shall be selected
based on what is appropriate for the plant type within that hydrozone.
(iii)
Where feasible, trees shall be placed on separate valves from
shrubs, groundcovers, and turf.
(iv)
Individual hydrozones that mix plants of moderate and low water
use, or moderate and high water use, may be allowed if:
(v)
Individual hydrozones that mix high and low water use plants
shall not be permitted.
(vi)
On the landscape design plan and irrigation design plan, hydrozone
areas shall be designated by number, letter, or other designation.
On the irrigation design plan, designate the areas irrigated by each
valve, and assign a number to each valve. Use this valve number in
the Hydrozone Information Table (see Appendix B Section A). This table
can also assist with the irrigation audit and programming the controller.
2.
The
irrigation design plan, at a minimum, shall contain:
(a)
Location and size of separate water meters for landscape;
(b)
Location, type and size of all components of the irrigation system,
including controllers, main and lateral lines, valves, sprinkler heads,
moisture sensing devices, rain switches, quick couplers, pressure
regulators, and backflow prevention devices;
(c)
Static water pressure at the point of connection to the public water
supply;
(d)
Flow rate (gallons per minute), application rate (inches per hour),
and design operating pressure (pressure per square inch) for each
station;
(e)
Recycled water irrigation systems as specified in Section 17.41.10(R);
(f)
The following statement: "I have complied with the criteria of the
ordinance and applied them accordingly for the efficient use of water
in the irrigation design plan"; and
(g)
The signature of a licensed landscape architect, certified irrigation designer, licensed landscape contractor, or any other person authorized to design an irrigation system. (See Sections 5500.1, 5615, 5641, 5641.1, 5641.2, 5641.3, 5641.4, 5641.5, 5641.6, 6701, 7027.5 of the Business and Professions Code, Section 832.27 of Title 16 of the California Code of Regulations, and Section 6721 of the Food and Agricultural Code.)
Note—Authority cited: Section 65595, Government
Code.
State law reference—Reference: Section 65596,
Government Code.
L.
Grading
Design Plan.
1.
For
the efficient use of water, grading of a project site shall be designed
to minimize soil erosion, runoff, and water waste. A grading plan
shall be submitted as part of the landscape documentation package.
A comprehensive grading plan prepared by a civil engineer for other
local agency permits satisfies this requirement.
(b)
To prevent excessive erosion and runoff, it is highly recommended
that project applicants:
(c)
The grading design plan shall contain the following statement: "I
have complied with the criteria of the ordinance and applied them
accordingly for the efficient use of water in the grading design plan"
and shall bear the signature of a licensed professional as authorized
by law.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
M.
Certificate
of Completion.
1.
The
certificate of completion (see Appendix C for a sample certificate)
shall include the following six elements:
(b)
Certification by either the signer of the landscape design plan,
the signer of the irrigation design plan, or the licensed landscape
contractor that the landscape project has been installed per the approved
landscape documentation package;
(i)
Where there have been significant changes made in the field
during construction, these "as-built" or record drawings shall be
included with the certification;
(c)
Irrigation scheduling parameters used to set the controller (see
Section 17.41.10(N));
(d)
Landscape and irrigation maintenance schedule (see Section 17.41.10(O));
(e)
Irrigation audit report (see Section 17.41.10(P)); and
(f)
Soil analysis report, if not submitted with landscape documentation
package, and documentation verifying implementation of soil report
recommendations (see Section 17.41.10(I))
3.
The
city of Crescent City shall:
(a)
Receive the signed certificate of completion from the project applicant;
(b)
Approve or deny the certificate of completion. If the certificate
of completion is denied, the city of Crescent City shall provide information
to the project applicant regarding reapplication, appeal, or other
assistance.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
N.
Irrigation
Scheduling.
1.
For
the efficient use of water, all irrigation schedules shall be developed,
managed, and evaluated to utilize the minimum amount of water required
to maintain plant health. Irrigation schedules shall meet the following
criteria:
(a)
Irrigation scheduling shall be regulated by automatic irrigation
controllers.
(b)
Overhead irrigation shall be scheduled between 8:00 p.m. and 10:00
a.m. unless weather conditions prevent it. If allowable hours of irrigation
differ from the local water purveyor, the stricter of the two shall
apply. Operation of the irrigation system outside the normal watering
window is allowed for auditing and system maintenance.
(c)
For implementation of the irrigation schedule, particular attention
must be paid to irrigation run times, emission device, flow rate,
and current reference evapotranspiration, so that applied water meets
the estimated total water use. Total annual applied water shall be
less than or equal to maximum applied water allowance (MAWA). Actual
irrigation schedules shall be regulated by automatic irrigation controllers
using current reference evapotranspiration data (e.g., CIMIS) or soil
moisture sensor data.
(e)
Each irrigation schedule shall consider for each station all of the
following that apply:
(i)
Irrigation interval (days between irrigation);
(ii)
Irrigation run times (hours or minutes per irrigation event
to avoid runoff);
(iii)
Number of cycle starts required for each irrigation event to
avoid runoff;
(iv)
Amount of applied water scheduled to be applied on a monthly
basis;
(v)
Application rate setting;
(vi)
Root depth setting;
(vii)
Plant type setting;
(viii)
Soil type;
(ix)
Slope factor setting;
(x)
Shade factor setting; and
(xi)
Irrigation uniformity or efficiency setting.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
O.
Landscape
and Irrigation Maintenance Schedule.
1.
Landscapes
shall be maintained to ensure water use efficiency. A regular maintenance
schedule shall be submitted with the certificate of completion.
2.
A
regular maintenance schedule shall include, but not be limited to,
routine inspection; adjustment and repair of the irrigation system
and its components; aerating and dethatching turf areas; replenishing
mulch; fertilizing; pruning; weeding in all landscape areas, and removing
and obstruction to emission devices. Operation of the irrigation system
outside the normal watering window is allowed for auditing and system
maintenance.
3.
Repair
of all irrigation equipment shall be done with the originally installed
components or their equivalents.
4.
A
project applicant is encouraged to implement sustainable or environmentally-friendly
practices for overall landscape maintenance.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
P.
Irrigation
Audit, Irrigation Survey, and Irrigation Water Use Analysis.
1.
All
landscape irrigation audits shall be conducted by a certified landscape
irrigation auditor.
2.
For
new construction and rehabilitated landscape projects installed after
January 1, 2010, as described in Section 17.41.10(B):
3.
The
project applicant shall submit an irrigation audit report with the
certificate of completion to the city of Crescent City that may include,
but is not limited to: inspection, system tune-up, system test with
distribution uniformity, reporting overspray or run off that causes
overland flow, and preparation of an irrigation schedule;
4.
The
city of Crescent City shall administer programs that may include,
but not be limited to, irrigation water use analysis, irrigation audits,
and irrigation surveys for compliance with the maximum applied water
allowance.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
Q.
Irrigation
Efficiency.
1.
For
the purpose of determining maximum applied water allowance, average
irrigation efficiency is assumed to be 0.71. Irrigation systems shall
be designed, maintained, and managed to meet or exceed an average
landscape irrigation efficiency of 0.71.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
R.
Recycled
Water.
1.
The
installation of recycled water irrigation systems shall allow for
the current and future use of recycled water, unless a written exemption
has been granted as described in Section 17.41.10(R)(2)
2.
Irrigation
systems and decorative water features shall use recycled water unless
a written exemption has been granted by the local water purveyor stating
that recycled water meeting all public health codes and standards
is not available and will not be available for the foreseeable future.
3.
All
recycled water irrigation systems shall be designed and operated in
accordance with all applicable local and state laws.
4.
Landscapes
using recycled water are considered special landscape areas. The ET
adjustment factor for special landscape areas shall not exceed 1.0.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
S.
Stormwater
Management.
1.
Stormwater
management practices minimize runoff and increase infiltration which
recharges groundwater and improves water quality. Implementing stormwater
best management practices into the landscape and grading design plans
to minimize runoff and to increase on-site retention and infiltration
are encouraged.
2.
Project
applicants shall refer to the city of Crescent City or regional water
quality control board for information on any applicable stormwater
ordinances and stormwater management plans.
3.
Rain
gardens, cisterns, and other landscapes features and practices that
increase rainwater capture and create opportunities for infiltration
and/or onsite storage are recommended.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
T.
Public
Education.
1.
Publications.
Education is a critical component to promote the efficient use of
water in land-scapes. The use of appropriate principles of design,
installation, management and maintenance that save water is encouraged
in the community.
(a)
The city of Crescent City shall provide information to owners of
new, single-family residential homes regarding the design, installation,
management, and maintenance of water efficient landscapes.
2.
Model
Homes. All model homes that are landscaped shall use signs and written
information to demonstrate the principles of water efficient landscapes
described in this chapter.
(a)
Signs shall be used to identify the model as an example of a water
efficient landscape featuring elements such as hydrozones, irrigation
equipment, and others that contribute to the overall water efficient
theme.
(b)
Information shall be provided about designing, installing, managing,
and maintaining water efficient landscapes.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
U.
Environmental
Review.
1.
The
city of Crescent City must comply with the California Environmental
Quality Act (CEQA), as appropriate.
Note—Authority cited: Section 21082, Public
Resources Code.
State law reference—Sections 21080, 21082,
Public Resources Code.
V.
Provisions
for Existing Landscapes.
1.
The
city of Crescent City may designate another agency, such as a water
purveyor, to implement some or all of the requirements contained in
this chapter. Local agencies may collaborate with water purveyors
to define each entity's specific responsibilities relating to this
chapter.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
W.
Irrigation
Audit, Irrigation Survey, and Irrigation Water Use Analysis.
1.
This
section, 17.41.10(W), shall apply to all existing landscapes that
were installed before January 1, 2010 and are over one acre in size.
(a)
For all landscapes in Section 17.41.10(W)(1) that have a water meter,
the city of Crescent City shall administer programs that may include,
but not be limited to, irrigation water use analyses, irrigation surveys,
and irrigation audits to evaluate water use and provide recommendations
as necessary to reduce landscape water use to a level that does not
exceed the maximum applied water allowance for existing landscapes.
The maximum applied water allowance for existing landscapes shall
be calculated as: MAWA = (0.8) (ETo)(LA)(0.62).
(b)
For all landscapes in Section 17.41.10(W)(1), that do not have a
meter, the city of Crescent City shall administer programs that may
include, but not be limited to, irrigation surveys and irrigation
audits to evaluate water use and provide recommendations as necessary
in order to prevent water waste.
2.
All
landscape irrigation audits shall be conducted by a certified landscape
irrigation auditor.
Note—Authority cited: Section 65595, Government
Code.
State law reference—Section 65596, Government
Code.
X.
Water
Waste Prevention.
1.
The
city of Crescent City shall prevent water waste resulting from inefficient
landscape irrigation by prohibiting runoff from leaving the target
landscape due to low head drainage, overspray, or other similar conditions
where water flows onto adjacent property, non-irrigated areas, walks,
roadways, parking lots, or structures. Violations shall be cited and
fined in accordance with the city's administrative citation procedures.
2.
Restrictions
regarding overspray and runoff may be modified if:
Y.
Effective Precipitation.
1.
The
city of Crescent City may consider effective precipitation (twenty-five
percent of annual precipitation) in tracking water use and may use
the following equation to calculate maximum applied water allowance:
|
MAWA= (ETo - Eppt)(0.62) [(0.7 × LA) + (0.3 × SLA)].
|
Note—Authority cited: Section 65595,
Government Code.
State law reference—Section 65596, Government
Code.
|
Appendix A.
Reference Evapotranspiration (ETo) Table
| |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
County and City
|
Jan.
|
Feb.
|
Mar.
|
Apr.
|
May
|
Jun.
|
Jul.
|
Aug.
|
Sept.
|
Oct.
|
Nov.
|
Dec.
|
Ann-ual ETo
|
|
DEL NORTE
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Crescent City
|
0.5
|
0.9
|
2.0
|
3.0
|
3.7
|
3.5
|
4.3
|
3.7
|
3.0
|
2.0
|
0.9
|
0.5
|
27.7
|
|
* The values in this table were derived from:
| |
|
1)
|
California Irrigation Management Information System (CIMIS);
|
|
2)
|
Reference Evapotranspiration Zones Map, UC Dept. of Land, Air
& Water Resources and California Dept. of Water Resources 1999;
and
|
|
3)
|
Reference Evapotranspiration for California, University of California,
Department of Agriculture and Natural Resources (1987) Bulletin 1922,
4) Determining Daily Reference Evapotranspiration, Cooperative Extension
UC Division of Agriculture and Natural Resources (1987), Publication
Leaflet 21426
|
|
Appendix B. Sample Water Efficient Landscape Worksheet
 |
|
SECTION B. WATER BUDGET CALCULATIONS
 |
 |
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Appendix C. Sample Certificate of Completion
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(Ord. 751 § 6(Exh. A), 1-19-2010)
