Emergency Burn Ban In Effect 10/26/24 - An emergency burn ban is now in effect for all Connecticut State Parks, Forests, and Wildlife Management areas, prohibiting the use of all outdoor grills, firepits, and campfires, and the kindling and use of flame outdoors. DEEP and local agencies are working to contain several active fires across the state. Please avoid all affected State Parks and Forests, as well as the blue-blazed Mattabesett Trail. The Enduro Trail in Voluntown and portions of North Stonington within the Pachaug State Forest are closed at this time. Please note that today's forest fire danger report remains at an 'extreme' level. More information about the current fire danger, burn ban and recommended safety measures can be found here

Understanding Groundwater Glossary

aquifer - a geologic formation that is capable of yielding usable amounts of water to a well or spring. 

cone of depression - a drawdown of groundwater in the shape of an inverted cone created by a pumping well.

bedrock - solid rock that forms the earth’s crust (sometimes called ledge; it is intermittently exposed at the earth’s surface but is more commonly covered by soil.

contaminate - to make impure (pollute) by the addition of some substance.

contamination plume - a concentrated mass of pollutant that moves with the groundwater.

drainage basin - the land area that gathers and carries surface runoff and groundwater to a particular stream, river or  lake.

evapotranspiration - loss of water to the atmosphere by direct evaporation from land and water surfaces combined with water transpired by living plants.

groundwater - water, lying below the water table, in the saturated zone.

hydrologic cycle - the distribution and circulation of water above, on, and below the earth’s surface.

infiltration - movement of water into the earth.

pollutant - any solid, liquid, gaseous or radiological element or compound that would render any substance unfit for use.

precipitation - the discharge of water from the atmosphere, in either liquid or solid form.

recharge - replenishment of groundwater by infiltration.

saturated zone - a subsurface zone in which all open spaces in soil or bedrock formation are filled with water; the area lying below the water table surface.

stratified drift - sand, gravel, silt and clay particles that were transported, sorted and deposited in layers of similar grain size by glacial melt waters.

surface water - water that lies on and flows across the land surface as lakes, rivers, streams, and oceans.

till - a largely unsorted mix of boulders, gravel, sand, silt and clay laid on the land directly by glacial ice.

unsaturated zone - a zone extending from the water table up to the land surface and where the openings  between soil particles are only partially filled with water.

water table - the top of the saturated zone; the surface beneath which all open spaces between soil particles are completely filled with water.

watershed - another term for drainage basin.

Understanding Groundwater