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Home / Geologic Publications / Great Salt Lake and Antelope Island / Ground-water sensitivity and vulnerability to pesticides, East Shore area of Great Salt Lake, Davis and Weber Counties, Utah

Ground-water sensitivity and vulnerability to pesticides, East Shore area of Great Salt Lake, Davis and Weber Counties, Utah

Ground-water sensitivity and vulnerability to pesticides, East Shore area of Great Salt Lake, Davis and Weber Counties, Utah
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By: M. Lowe, J. Wallace, and M. Butler

Ground-water sensitivity (intrinsic susceptibility) to pesticides is determined by assessing natural factors favorable or unfavorable to the degradation of ground water by any pesticides applied to or spilled on the land surface. Hydrogeologic setting (vertical ground-water gradient and presence or absence of confining layers), soil hydraulic conductivity, retardation of pesticides, attenuation of pesticides, and depth to ground water are the factors primarily determining ground-water sensitivity to pesticides in the east shore area of Great Salt Lake. Much of the east shore area has low ground-water sensitivity to pesticides due to prevalent protective clay layers.

Ground-water vulnerability to pesticides is determined by assessing how ground-water sensitivity is modified by the activities of humans. Ground-water sensitivity to pesticides, the presence of applied water (irrigation), and crop type are the three factors generally determining ground-water vulnerability to pesticides in the east shore area of Great Salt Lake. Areas of high vulnerability are located primarily in areas where irrigation occurs and ground-water sensitivity to pesticides is high. Of particular concern are areas where influent (losing) streams originating in mountainous areas cross the basin margin; streams in these areas are the most important source of recharge to the basin-fill aquifer and efforts to preserve water quality in streams at these points would help to preserve ground-water quality in the entire east shore area.

Other Information:
Published: 2004
Pages: 28 p.
Plates: 2 pl.
Scales: 1:75,000
Location: Davis and Weber Counties
Media Type: CD-ROM Publication

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