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36991 results.

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Page 499, results 12451 - 12475

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Channel change on the Santa Cruz River, Pima County, Arizona, 1936-86
J. T. Parker
1993, Open-File Report 93-41
The Santa Cruz River, an ephemeral river that drains 8,581 square miles in southeastern Arizona, has a long history of channel instability. Since the late 19th century, lateral channel erosion has caused extensive property damage, particularly in Pima County. During the flood of 1983, about $100 million damage was caused...
Approximate changes in water levels in wells completed in the Chicot and Evangeline aquifers, 1990-93 and 1992-93, in Fort Bend County and adjacent areas, Texas
Horatio X. Santos, Dana L. Barbie
1993, Open-File Report 93-81
This report was prepared in cooperation with the Fort Bend Subsidence District and presents data on water-level changes in wells during 1990-93 and 1992-93 in the Chicot and Evangeline aquifers (figs. 1-4) in Fort Bend County.  Water-level changes maps were prepared previously by Locke (1990), and Locke and Santos (1992)...
Approximate changes in water levels in wells completed in the Chicot and Evangeline aquifers, 1977-93 and 1992-93, and measured compaction, 1973-92, in the Houston-Galveston region, Texas
Mark C. Kasmarek, L.S. Coplin, Al Campodonico
1993, Open-File Report 93-86
This report is one in a series of reports that depict water-level changes since 1977 and compaction of subsurface material since 1973.  The report was prepared in cooperation with the Harris-Galveston Coastal Subsidence District and the City of Houston, and presents maps showing the approximate changes in water levels in...
Summary of reported agriculture and irrigation water use in Lawrence County, Arkansas, 1991
T.W. Holland, C.A. Manning, K.L. Stafford
1993, Open-File Report 93-461
This report summarizes the 1991 water-use reporting through the Conservation District Office in Lawrence County, Arkansas. The number of withdrawal registra- tions for Lawrence County was 1,674 (1,525 ground- water and 149 surface water). Water withdrawals reported during the registration process total 0.22 Mgal/d (0.22 Mgal/d groundwater and none...
Modifications to the modular three-dimensional finite-difference ground-water flow model used for the Columbia Plateau Regional Aquifer-System Analysis, Washington, Oregon, and Idaho
A. J. Hansen Jr.
1993, Open-File Report 91-532
The report documents modifications to the U.S. Geological Survey's modular three-dimensional finite-difference ground-water flow model used for a regional aquifer-system analysis of the Columbia Plateau. The report, which describes the concepts and mathematical basis for the modifications, is intended for potential users who are familiar with the original modular model....
Summary of reported agriculture and irrigation water use in Lafayette County, Arkansas, 1991
T.W. Holland, C.A. Manning, K.L. Stafford
1993, Open-File Report 93-468
This report summarizes the 1991 water-use reporting through the Conservation District Office in Lafayette County, Arkansas. The number of withdrawal registrations for Lafayette County was 104 (93 groundwater and 11 surface water). Water withdrawals reported during the registration process total 0.08 Mgal/d (none from groundwater and 0.08 Mgal/d surface water)...
Quantifying favorableness for occurrence of a mineral deposit type using fuzzy logic; an example from Arizona
Mark E. Gettings, Mark W. Bultman
1993, Open-File Report 93-392
An application of possibility theory from fuzzy logic to the quantification of favorableness for quartz-carbonate vein deposits in the southern Santa Rita Mountains of southeastern Arizona is described. Three necessary but probably not sufficient conditions for the formation of these deposits were defined as the occurrence of carbonate berain...
Summary of reported agriculture and irrigation water use in Jackson County, Arkansas, 1991
T.W. Holland, C.A. Manning, K.L. Stafford
1993, Open-File Report 93-432
This report summarizes the 1991 water-use reporting through the Conservation District Office in Jackson County, Arkansas. The number of withdrawal registrations for Jackson County was 2,450 (2,279 groundwater and 171 surface water). Water withdrawals reported during the registration process total 5.24 Mgal/d (4.81 Mgal/d groundwater and 0.43 Mgal/d surface water)...
Silver concentrations and selected hydrologic data in the Upper Colorado River basin, 1991-92
D. A. Johncox
1993, Open-File Report 93-447
The U.S. Geological Survey, in cooperation with the Colorado River Water Conservation District and the Northern Colorado Water Conservancy District, collected water and sediment samples in May and September 1991 and 1992 from nine stream-sampling sites and three lake-sampling sites within the Upper Colorado River Basin upstream from Kremmling, Colorado....
Summary of reported agriculture and irrigation water use in Greene County, Arkansas, 1991
T.W. Holland, C.A. Manning, K.L. Stafford
1993, Open-File Report 93-430
This report summarizes the 1991 water-use reporting through the Conservation District Office in Greene County, Arkansas. The number of withdrawal registrations for Greene County was 1,567 (1,510 groundwater and 57 surface water). Water withdrawals reported during the registration process total 26.69 Mgal/d (23.98 Mgal/d groundwater and 2.71 Mgal/d surface water)...
Core OL-92 from Owens Lake, southeast California
James L. Bischoff
George I. Smith, editor(s)
1993, Open-File Report 93-683
The drilling project at Owens Lake commenced in April, 1991. This Open-File Report represents an effort to make available to other researchers our preliminary data collected during the first year of study following completion of the core-drilling phase. Nineteen data collections and preliminary interpretations are presented in the following sections....
Ground-water quality at the Management Systems Evaluation Area near Princeton, Minnesota, 1991-92
Matthew K. Landon, Geoffrey N. Delin, J.A. Lamb, Lei Guo
1993, Open-File Report 93-80
The northern cornbelt sand-plains Management Systems Evaluation Area (MSEA) program is a multiagency, multistate initiative to evaluate the effects of modified and prevailing farming systems on water quality in a sand-plain area in Minnesota and at satellite areas in North and South Dakota, and Wisconsin. The primary objective of Minnesota...
Surface-water-quality assessment of the Upper Illinois River basin in Illinois, Indiana, and Wisconsin : data on manmade nonagricultural volatile and semivolatile organic chemicals in water, May 1988 through March 1990
F. A. Fitzpatrick, J.A. Colman
1993, Open-File Report 92-467
This report contains data from the survey of manmade nonagricultural volatile and semivolatile organic chemicals in surface water in the upper Illinois River basin from May 1988 through March l990. In addition to the data, sampling methods and quality-assurance procedures are described. The survey was part of the upper Illinois...