Water Supply and Irrigation Papers of the United States Geological Survey . arries an oily scum due to the decomposi-tion of vegetable matter. The scum is often mistaken for using such a spring the vegetation should be cleared away and asmall reservoir constructed, or tank sunk in the ground. The waters of the seepage springs usually come from no great dis-tance beneath the surface and are not usually very cold. Being fed bywaters coming from near the surface they are sometimes likely tobecome polluted, and local conditions should be carefully studied beforethe water is used f
Water Supply and Irrigation Papers of the United States Geological Survey . arries an oily scum due to the decomposi-tion of vegetable matter. The scum is often mistaken for using such a spring the vegetation should be cleared away and asmall reservoir constructed, or tank sunk in the ground. The waters of the seepage springs usually come from no great dis-tance beneath the surface and are not usually very cold. Being fed bywaters coming from near the surface they are sometimes likely tobecome polluted, and local conditions should be carefully studied beforethe water is used for drinking. Seepage springs sometimes emerge along the top of an underlyingimpervious bed, but more frequently occur where valleys are cut down-ward into the zone of saturation of a more or less uniform water-bearingdeposit, or where the water table comes to the surface near a stream,a lake, or the sea. Under favorable conditions the seepage fromsands, as on Long Island, gathers into channels and forms streams of U. S. GEOLOGICAL SURVE^ WATER-SUPPLY PAPER NO. 114 PL. IV. A. SPRING FORMED AT OUTCROP OF AN IMPERVIOUS FLOOR.
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Keywords: ., bookauthorunitedst, bookcentury1900, bookdecade1900, bookyear1905
