Ground water in the Norwalk, Suffield, and Glastonbury areas, Connecticut . fine clays have as high porosity as thegravels, Imt because of the interstitial friction in the minute poresthey are virtually impermeable. At some depth the pores of the earth are saturated with rains and melting snows supply water which would saturate therock deposits throughout but for the lateral escape of the groundwater. The upper surface of this saturated zone is known as thewater table. In Connecticut the water table is in general near the surface ofthe ground in and after seasons of high precipitatio
Ground water in the Norwalk, Suffield, and Glastonbury areas, Connecticut . fine clays have as high porosity as thegravels, Imt because of the interstitial friction in the minute poresthey are virtually impermeable. At some depth the pores of the earth are saturated with rains and melting snows supply water which would saturate therock deposits throughout but for the lateral escape of the groundwater. The upper surface of this saturated zone is known as thewater table. In Connecticut the water table is in general near the surface ofthe ground in and after seasons of high precipitation in areas wherethe mantle rock is thin or discontinuous and Avhere the surface isrelatively level. High, level terraces are an exception to this water table is likely to be particularly high in small deposits thatfill depressions in the surface of the bedrock. Along the edges ofstreams, lakes, and swamps the water level is at the surface. It isrelatively low in times of drought on steep slopes and in ])laces 26 GROUIs^D WATER IN AND OTHER AREAS, FiGURB 4.—Diagram showing the usual relation ofthe water table to the land surface on hills andiu valleys. where the mantle rock is thick. The depth to the water tablefluctuates with the seasons and may be increased by drainage of wetgrounds, by heavy draft on wells, and by transpiration from vege-tation, as well as by changes in the rates of precipitation and evapor-ation. The improvements made by man on farms and the engineeringworks in cities artificially lower the water table. In Connecticut the greatest fluctuation ison steep hillside slopesfrom which the waterdrains rather readily. Insuch situations there is alsorapid though often tempo-rary replenishment of theground water after are in Connecticutno extensive water-bearingformations such as the Da-kota sandstone, which isused as a source of water supi^ly in much of the Great Plains. Theground waters in Connecticut are derived from rain or m
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Keywords: ., bookcentury1900, bookdecade1920, bookpubl, booksubjectwatersupply
