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Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.

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At least 1,261 records · Page 70Linked to original sources
USGS1983

Estimated oil and gas reserves, southern California outer continental shelf, December 31, 1982

Remaining recoverable reserves of oil* and gas in the Outer Continental Shelf off Southern California are estimated to be 968 million barrels of oil and 1,851 billion cubic feet of gas as of December 31, 1982. These reserves are attributed to 14 fields. Original recoverable reserves from these fields are estimated at 1,217 million barrels of oil and 1,983 billion cubic feet of gas. The estimates for both the remaining and the original recoverable reserves of oil and gas are higher than the corresponding estimates for December 31, 1981. Reserve estimates for 12 fields were based on volumetric reservoir studies. Decline-curve and volumetric analyses were used for the remaining two fields. Six fields were on production at year's end and a gas field is scheduled to commence production in 1983. *The term 'oil' as used in this report includes crude oil, condensate, and gas-plant liquids.

California↗
USGS1979

Streamflow statistical summaries for Colorado streams through September 30, 1975; Volume 3, Colorado River basin from Gunnison River to San Juan River

This report contains statistical summaries of daily streamflow data as of September 30, 1975, for 234 stations west of the Continental Divide in Colorado and adjacent States for use by agencies and individuals engaged in water studies. To be included in this report, a station had to have a minimum of 3 complete water years (October 1 to September 30) of record and 3 complete climatic years (April I to March 31) of record having virtually constant effects of regulation and diversion, and to have had streamflow records previously reviewed and published by the U.S. Geological Survey. Duration tables show the distribution of daily discharges for each water year ending September 30. High-flow sequence tables show the highest mean discharge for 1, 3, 7, 15, 30, 60, 90, 120, and 183 consecutive days of each water year. Low-flow sequence tables show the lowest mean discharge for 1, 3, 7, 14, 30, 60, 90, 120, and 183 consecutive days of each climatic year. For monthly flows the following statistics have been computed for each station having 5 or more complete water years of record: (1) mean, (2) variance, (3) standard deviation, (4) skewness, (5) coefficient of variation, and (6) percentage of average flow. The first five items were also computed for the water year annual flows along with the first order serial correlation coefficient. For stations which have had virtually instantaneous significant changes in the effects of regulation and diversion, a maximum of two sets of summaries are shown. Referenced reports describe procedures for processing and interpreting the streamflow statistics.

Open-File Report↗
USGS1984

Ideas for clear technical writing

The three greatest obstacles to clear technical-report writing are probably (1) imprecise words, (2) wordiness, and (3) poorly constructed sentences. Examples of category 1 include abstract words, jargon, and vogue words; of category 2, sentences containing impersonal construction superfluous words; and of category 3, sentences lacking parallel construction and proper order of related words and phrases. These examples and other writing-related subjects are discussed in the report, which contains a cross-referenced index and 24 references.

Open-File Report↗
USGS1985

Selected hydrologic data for the Powell River basin in Wise County, Virginia

Evaluation of selected surface-water, ground-water, and water-quality data shows that hydrologic data collected by governmental agencies comprises less than 10 percent of the total data available in the Powell River basin, Virginia. Only a small portion of the hydrologic data for the basin has been compiled and stored by Federal and state agencies in two computerized hydrologic indexing systems (National Water Data Exchange and Commonwealth Data Base). Selected ground-water, surface-water, and water-quality data collected in the Powell River Basin in Wise County, Virginia are summarized. The data are obtained from three coal-mining companies, the Virginia State Water Control Board, and the U.S. Geological Survey. Water-quality data for 61 ground-water and 86 surface-water sites indicate elevated iron and manganese concentrations are present throughout the basin. A bibliography of available hydrologic reports on the area and selected pertinent hydrologic reports from other coal-producing areas is present. (USGS)

Open-File Report↗
USGS1989

Water-resources activities of the U.S. Geological Survey in Montana, October 1987 through September 1989

Water resources programs and activities of the U.S. Geological Survey in Montana consist principally of hydrological data collection and local, areal, or statewide hydrologic investigations. The work is supported by direct Federal funding, by transfer of funds from other Federal agencies, and by joint funding agreements with State or local agencies. The Montana District of the Geological Survey 's Water Resources Division conducts its hydrologic work through a headquarters office in Helena, and field offices in Helena, Billings, Fort Peck and Kalispell. This report describes the eighteen projects funded for fiscal years 1988 and 1989. In addition, it describes the operations of the Montana District, water conditions during water year 1988, activities in addition to regular programs, sources of publications and information, and lists reports published or released during the preceding 5 years. (USGS)

Open-File Report↗
USGS1990

Estimated demand for agricultural water for irrigation use in New Jersey, 1990

As part of an effort to determine if an adequate supply of agricultural water for irrigation use will be available to farmers, the U.S. Geological Survey prepared preliminary estimates of demand for agricultural water for irrigation use for the year 1990 on the basis of six possible scenarios. These scenarios incorporate normal and drought climatic conditions and three alternative estimates of the total acreage of farmland that may be irrigated in 1990. Preliminary estimates of water demand based on soil-moisture deficits were made using methods for calculating climatic water budgets. These estimates ranged from 3.0 billion gal/growing season (May through September), under normal climatic conditions and a 2% annual decline in irrigated acreage since 1984, to 28. 9 billion gal/growing season, under drought conditions and a 2% annual increase in irrigated acreage since 1984. Preliminary estimates of water demand made for the 1986 growing season reasonably approximate reported water use for that period. (USGS)

Open-File Report↗
USGS1994

Water levels through 1989 in bedrock aquifers in South Dakota

The U.S. Geological Survey, in cooperation with the South Dakota Department of Environmental and Natural Resources, has collected water-level data for 237 wells completed in bedrock aquifers throughout South Dakota. The water levels are presented in hydrographs in the main body of the report and in tables in a Supplemental Information section at the end of the report. The data are organized by county, in alphabetical order.

Open-File Report↗
USGS1994

Water-quality, bed-sediment, and biological data (October 1992 through September 1993) and statistical summaries of water-quality data (March 1985 through September 1993) for streams in the upper Clark Fork basin, Montana

Water, bed sediment, and biota were sampled in streams from Butte to below Missoula as part of a program to characterize aquatic resources in the upper Clark Fork basin of western Montana. Water-quality data were obtained periodically at 16 stations during October 1992 through September 1993 (water year 1993); daily suspended-sediment data were obtained at six of these stations. Bed-sediment and biological data were obtained at 11 stations in August 1993. Sampling stations were located on the Clark Fork and major tributaries. The primary constituents analyzed were trace elements associated with mine tailings from historic mining and smelting activities. Water-quality data include concentra- tions of major ions, trace elements, and suspended sediment in samples collected periodically during water year 1993. A statistical summary of water- quality data is provided for the period of record at each station since 1985. Daily values of streamflow, suspended-sediment concentration, and suspended-sediment discharge are given for six stations. Bed-sediment data include trace- element concentrations in the fine and bulk fractions. Biological data include trace-element concentrations in whole-body tissue of aquatic benthic insects. Quality-assurance data are reported for analytical results of water, bed sediment, and biota.

Open-File Report↗
USGS1994

Summary of water-resources activities of the U.S. Geological Survey in Colorado - Fiscal years 1992-93

Water-resources activities of the U.S. Geological Survey in Colorado consist of collecting water-resources data and doing interpretive hydrologic investigations. The water-resources data and the results of the investigations are published or released by either the U.S. Geological Survey or by cooperating agencies. Water-resources investigations in Colorado for the 1992-93 fiscal years (October 1,1991, to September 30,1993) are described in this report.

Colorado↗
USGS1995

Hydrologic and water-quality data for the lower Bradley River, Alaska, March 1993 to April 1994

A dam constructed at the outlet of Bradley Lake near Homer, Alaska has blocked natural flows to the lower Bradley River. To protect salmon egg incubation habitat during the period November 2 to April 30, a fish-water bypass was incorporated into the design of the dam to ensure a minimum discharge of 40 cubic feet per second in the lower river. This minimum flow determination was based on an open-water instream flow study that did not take into account effects of ice formation. A study was begun in March 1993 to determine winter flow conditions in the lower Bradley River. As a part of this study, data were collected at sites in the lower Bradley River to measure discharge, wetted perimeter, cross-sectional area, water depth, flow velocity, and specific conductance, as well as temperature and dissolved oxygen from both surface water and intragravel water. Discharge and specific conduc- tance in the Middle Fork Bradley River below North Fork Bradley River were also measured. This report presents data collected between March 1993 and April 1994.

Alaska↗
USGS1998

Hydrologic and water-quality data for the lower Bradley River, Alaska, November through April 1995-98

A dam constructed at the outlet of Bradley Lake near Homer, Alaska has blocked natural flows to the lower Bradley River. To protect salmon egg incubation habitat during the period of November 2 to April 30, a fish-water bypass was incorporated into the design of the dam to ensure a minimum discharge of 40 cubic feet per second in the lower river. This minimum flow determination was based on an open-water instream flow study that did not take into account effects of ice formation. A study was begun in March 1993 to determine winter flow conditions in the lower Bradley River. As a part of this study, data were collected at sites in the lower Bradley River to measure discharge, wetted perimeter, water depth, flow velocity, and specific conductance, as well as temperature and dissolved oxygen from both surface water and intragravel water. This report presents data collected between November 1995 and April 1998.

Open-File Report↗
USGS2020

Data release of reprocessed select National Uranium Resources Evaluation program samples in Wyoming

The U.S. Atomic Energy Commission established the National Uranium Resources Evaluation (NURE) program in 1973 to identify uranium resources throughout the United States. Part of this program focused on the collection of stream-sediment samples and subsequent geochemical analyses of these samples for uranium, in addition to 47 other elements. As part of the original program, 18,424 stream-sediment samples were collected from Wyoming and analyzed. All original samples are stored at the U.S. Geological Survey’s (USGS) National Geochemical Sample Archive (NGSA). The Wyoming State Geological Survey (WSGS) recently selected 159 of the original Wyoming NURE stream samples to be reanalyzed using modern and standardized analytical equipment. The raw results of the reanalysis are provided with this report.

Wyoming↗