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Water-level records for the northern High Plains of Colorado, 1974-78
Ronald G. Borman
1978, Open-File Report 78-499
Water-level measurements were made in more than 600 wells in January 1978 in the northern High Plains of Colorado. Changes in water levels from January 1977 to January 1978 ranged from a rise of about 22 feet in Phillips County to a decline of about 14 feet in Yuma County....
Unsteady streamflow simulation using a linear implicit finite-difference model
Larry F. Land
1978, Water-Resources Investigations Report 78-59
A computer program for simulating one-dimensional subcritical, gradually varied, unsteady flow in a stream has been developed and documented. Given upstream and downstream boundary conditions and channel geometry data, roughness coefficients, stage, and discharge can be calculated anywhere within the reach as a function of time.The program uses a linear...
Chemical analyses of surface water in Illinois, 1958–74—Volume II, Illinois River basin and Mississippi River tributaries north of Illinois River basin
R. W. Healy, L.G. Toler
1978, Water-Resources Investigations Report 78-23
Samples of surface water were collected and analyzed by the Illinois Environmental Protection Agency and its predecessor, the Stream Pollution Control Bureau of the Illinois Department of Public Health. The results for the period 1958 to 1974 are presented in tabular form and the history of sampling and analytical methods...
Drought in California; water resources data for 1977
Leonard N. Jorgensen, Verrie F. Pearce
1978, Open-File Report 78-613
The 2-year dry period 1976-77 was the most severe drought in northern California 's history, and the quantity and quality of all water-supply sources in the State were affected. This report contains special water-resources data collected by the Geological Survey during 1977. These data include: streamflow at 11 selected stations,...