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Summary appraisals of the nation's ground-water resources – Lower Mississippi region
J. E. Terry, R.L. Hosman, C. T. Bryant
1979, Professional Paper 813-N
The Lower Mississippi Region comprises an area of 102,400 square miles (265,200 square kilometers). Almost all this area is in the physiographic province known as the Gulf Coastal Plain. Three small areas on the northwest boundary of the region are in the Interior Highlands. The Lower Mississippi Region has an abundance...
Summary appraisals of the nation's ground-water resources – Pacific Northwest region
Bruce L. Foxworthy
1979, Professional Paper 813-S
The Pacific Northwest Region's ground-water reservoirs are capable of providing large additional fresh-water supplies; these reservoirs become more important as undeveloped surface-storage sites and unapportioned surface-water supplies dwindle. Withdrawals of fresh water from all surface and underground sources are increasing; they may rise from the rate of 30 billion gallons...