Activities of the Water Resources Division in Arizona, 1995-96
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Geology topics
E.K. van de Vanter
Publications and source records attributed to E.K. van de Vanter.
Activities of the Water Resources Division in Arizona, 1986-91
Water-resources activities of the U.S. Geological Survey in Arizona consist of collecting water- resources data and conducting interpretive hydrologic investigations and research. The water- resources data and the results of the interpretive investigations and research are published or released by the U.S. Geological Survey or by cooperating agencies. The report describes the data-collection activities and water-resources investigations in Arizona for fiscal years 1986-91 (October 1, 1985, to September 30, 1991). The report includes a brief description of the origin of the U.S. Geological Survey, the basic mission of the Water Resources Division, organization of the Arizona District, sources of funding, and a summary of water conditions in Arizona. Information is given for each project and includes the objective, approach, progress and results, and plans for the following year. The report also includes a list of publications prepared by the Arizona District, Water Resources Division, U.S. Geological Survey, that were published from 1984 to 1991.
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Streamflow and sediment-transport data, Colorado River and three tributaries in Grand Canyon, Arizona, 1983 and 1985-86
The U.S. Geological Survey collected streamflow and sediment-transport data at 5 streamflow-gaging stations on the Colorado River between Glen Canyon Dam and Lake Mead as a part of an interagency environmental study. The data were collected for about 6 mo in 1983 and about 4 mo in 1985-86; data also were collected at 3 sites on tributary streams in 1983. The data were used for development of unsteady flow-routing and sediment-transport models, sand-load rating curves, and evaluation of channel changes. For the 1983 sampling period, 1,076 composite cross-section suspended-sediment samples were analyzed; 809 of these samples were collected on the main stem of the Colorado River and 267 samples were from the tributaries. Bed-material samples were obtained at 1,988 verticals; 161 samples of material in transport near the bed (bedload) were collected to define the location of sand, gravel, and bed rock in the channel cross section; and 664 discharge measurements were made. For the 1985-86 sampling period, 765 composite cross-section suspended-sediment samples and 887 individual vertical samples from cross sections were analyzed. Bed-material samples were obtained at 531 verticals, 159 samples of bedload were collected, and 218 discharge measurements were made. All data are presented in tabular form. Some types of data also are presented in graphs to better show trends or variations. (USGS)
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