United States Geological Survey YearbookThe Survey, 1990 - Geology |
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... earth scientist . The cumulative impact of human activities on our water resources can result in changes to the quality of those resources . Nature itself can affect water resources so that the water is not of sufficient quality to meet ...
... earth scientist . The cumulative impact of human activities on our water resources can result in changes to the quality of those resources . Nature itself can affect water resources so that the water is not of sufficient quality to meet ...
Page 4
... water - saturated , fine - grained sediments that amplified the ground shaking and were sus- ceptible to ground failure . The San Francisco Marina District trag- edy is one of special irony ; this community consists mostly of wood ...
... water - saturated , fine - grained sediments that amplified the ground shaking and were sus- ceptible to ground failure . The San Francisco Marina District trag- edy is one of special irony ; this community consists mostly of wood ...
Page 5
... water - saturated man- made sand fills that subsequently had been paved over . Many of these areas also under- went liquefaction during the 1906 earthquake . Significantly , no obvious ground failure occurred in numerous other extensive ...
... water - saturated man- made sand fills that subsequently had been paved over . Many of these areas also under- went liquefaction during the 1906 earthquake . Significantly , no obvious ground failure occurred in numerous other extensive ...
Page 8
... ground water in the newly developed well fields , Green directed his attention to the problem of water supply . Working through Army supply channels , he obtained miles of PVC pipe and many gasoline - powered generators and pumps ...
... ground water in the newly developed well fields , Green directed his attention to the problem of water supply . Working through Army supply channels , he obtained miles of PVC pipe and many gasoline - powered generators and pumps ...
Page 19
... surface and ground water are high - priority con- cerns of the public and government . Since 1970 , Congress has passed several acts that created regulatory programs aimed at curtail- ing the entry of point - source pollution into our ...
... surface and ground water are high - priority con- cerns of the public and government . Since 1970 , Congress has passed several acts that created regulatory programs aimed at curtail- ing the entry of point - source pollution into our ...
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activities Administration Alaska Arctic areas Assistant atrazine Award Baikal Bldg Board Bureau cartographic data Chief Hydrologist City City of w coal coastal Commission contamination cooperative Coordination County Denver Federal Center Department of Public Development disaster Division Chief drought earth science earthquake Environmental eruption Federal agencies field geologic map geologists geophysical ground water ground-water Hurricane Hugo hydrologic IDNDR Information Systems Interior investigations Island Lake Lake Baikal land lava located Loma Prieta earthquake Loudoun County Management Menlo Park ment miles mineral deposits mineral resources National Center National Mapping National Water NAWQA Office percent Planning production Puerto Rico Redoubt volcano Regional Reston River basin rock scale scientific scientists seismic Service spatial data storage storm studies surface tion Transportation U.S. Department U.S. Geological Survey U.S. Virgin Islands United users USGS Water Conservation District Water District water quality Water Resources Water-Quality Assessment