United States Geological Survey YearbookU.S. Geological Survey, 1994 - Geology |
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Page 32
... High Plains Aquifer he High Plains aquifer underlies one of United States . About 20 percent of the irrigated land in the United States is in the High Plains , and nearly 30 percent of the ground water used for irrigation in the United ...
... High Plains Aquifer he High Plains aquifer underlies one of United States . About 20 percent of the irrigated land in the United States is in the High Plains , and nearly 30 percent of the ground water used for irrigation in the United ...
Page 33
... High Plains aquifer in 1980 ( 3,250 million acre feet ) was in Nebraska . Water levels in the High Plains aquifer are monitored through an extensive observa- tion - well network . This network comprises many smaller networks of ...
... High Plains aquifer in 1980 ( 3,250 million acre feet ) was in Nebraska . Water levels in the High Plains aquifer are monitored through an extensive observa- tion - well network . This network comprises many smaller networks of ...
Page 34
... High Plains TEXAS Aquifer Boundary 33 ° 32 ° River River EXPLANATION Declines of over 50 feet Changes between -50 and +10 Rises of over 10 feet 0 50 ᅡ 0 Water - level change in the High Plains aquifer from 1980 to 1993 . midpoint of ...
... High Plains TEXAS Aquifer Boundary 33 ° 32 ° River River EXPLANATION Declines of over 50 feet Changes between -50 and +10 Rises of over 10 feet 0 50 ᅡ 0 Water - level change in the High Plains aquifer from 1980 to 1993 . midpoint of ...
Page 35
... High Plains . Since 1980 , about 14 mil- lion acres have been irrigated annually in the High Plains . Several factors to have contrib- appear uted to the smaller average water - level decline after 1980 , even though the average area ...
... High Plains . Since 1980 , about 14 mil- lion acres have been irrigated annually in the High Plains . Several factors to have contrib- appear uted to the smaller average water - level decline after 1980 , even though the average area ...
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