Groton's extensive and complex wetland systems are fundamental to its landscape, ecology, drinking water supplies and flood protection. The protection of wetlands in Groton is critical to the well-being and character of the community.
Groton's wetlands, natural landscape, and ecosystem are largely by-products of an unusual concentration of glacial landforms, including extensive areas of ice channel fillings, drumlins, ground moraines and the remnants of Glacial Lake Nashua. In addition, deep bedrock valleys filled with glacial sediments define the courses of the Nashua and Squannacook Rivers. This concentrated and complex set of landforms created intricate and varied topography, soils and hydrology, resulting in an extraordinary array of wetlands, ponds, vernal pools, and streams.
All of Groton's drinking water is derived from municipal or private wells. The groundwater that supplies these wells is intimately connected with these wetland systems, which filter, cleanse, and infiltrate water. The protection of both the wetlands themselves and their surrounding lands is essential to the protection of Groton's drinking water.
Groton's complex hydrological hydrologic systems and associated upland areas are also central to its rich and diverse ecosystem, including concentrations of rare and endangered species. Approximately 2/3 of Groton lies within state-designated Estimated and Priority Habitats for Rare and Endangered Species. The Massachusetts BioMap 2 project designates 67% of Groton as Core Habitat or Critical Natural Landscape, and approximately 88% of Groton has been designated as Areas of Critical Environmental Concern. All of these speak to both the local and the regional importance of Groton's wetlands.
The purpose of this chapter is to protect the wetlands, related water resources, and adjoining land areas in the Town of Groton by controlling activities determined by the Conservation Commission to be likely to have a significant or cumulatively detrimental effect upon any wetland resource area or value protected by this chapter, including but not limited to the following interests and values: protection of public or private water supply, groundwater, flood control, erosion and sedimentation control, storm damage prevention, water quality, water pollution control, fisheries, wildlife and wildlife habitat, rare plant or animal species and habitat, agriculture and aquaculture, recreation and aesthetic values. To that end, it is the intent of this chapter to protect additional wetland resource areas and interests, and to impose additional standards and procedures stricter than those of the Wetlands Protection Act, MGL C. 131, § 40.