Geology Reports⌕ Search

SEARCH · Geology Reports

Results for “Atlas”

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

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 343 records · Page 19Linked to original sources
USGS2008

Elevation-derived watershed basins and characteristics for major rivers of the conterminous United States

The U.S. Geological Survey Earth Resources Observation and Science Center Topographic Science Project has developed elevation-derived watershed basins and characteristics for major rivers of the conterminous United States. Watershed basins are delineated upstream from the mouth of major rivers by using the hydrologic connectivity of the Elevation Derivatives for National Applications (EDNA) seamless database. Watershed characteristics are quantified by integrating ancillary geospatial datasets, including land cover, population, slope, and topography, with elevation-derived watershed boundaries. The results are published in an online EDNA Watershed Atlas at http://edna.usgs.gov/watersheds. The atlas serves as a framework for evaluating and analyzing the physical, biological, and anthropogenic status of watersheds.

Scientific Investigations Report↗
USGS2009

Production of a national 1:1,000,000-scale hydrography dataset for the United States: feature selection, simplification, and refinement

During 2006-09, the U.S. Geological Survey, in cooperation with the National Atlas of the United States, produced a 1:1,000,000-scale (1:1M) hydrography dataset comprising streams and waterbodies for the entire United States, including Puerto Rico and the U.S. Virgin Islands, for inclusion in the recompiled National Atlas. This report documents the methods used to select, simplify, and refine features in the 1:100,000-scale (1:100K) (1:63,360-scale in Alaska) National Hydrography Dataset to create the national 1:1M hydrography dataset. Custom tools and semi-automated processes were created to facilitate generalization of the 1:100K National Hydrography Dataset (1:63,360-scale in Alaska) to 1:1M on the basis of existing small-scale hydrography datasets. The first step in creating the new 1:1M dataset was to address feature selection and optimal data density in the streams network. Several existing methods were evaluated. The production method that was established for selecting features for inclusion in the 1:1M dataset uses a combination of the existing attributes and network in the National Hydrography Dataset and several of the concepts from the methods evaluated. The process for creating the 1:1M waterbodies dataset required a similar approach to that used for the streams dataset. Geometric simplification of features was the next step. Stream reaches and waterbodies indicated in the feature selection process were exported as new feature classes and then simplified using a geographic information system tool. The final step was refinement of the 1:1M streams and waterbodies. Refinement was done through the use of additional geographic information system tools.

Scientific Investigations Report↗
USGS2022

Development of projected depth-duration frequency curves (2050–89) for south Florida

Planning stormwater projects requires estimates of current and future extreme precipitation depths for events with specified return periods and durations. In this study, precipitation data from four downscaled climate datasets are used to determine changes in precipitation depth-duration-frequency curves from the period 1966–2005 to the period 2050–89 primarily on the basis of Representative Concentration Pathways 4.5 and 8.5 emission scenarios from the Coupled Model Intercomparison Project Phase 5. The four downscaled climate datasets are (1) the Coordinated Regional Downscaling Experiment (CORDEX) dataset, (2) the Localized Constructed Analogs (LOCA) dataset, (3) the Multivariate Adaptive Constructed Analogs (MACA) dataset, and (4) the Jupiter Intelligence Weather Research and Forecasting Model (JupiterWRF) dataset. Change factors—multiplicative changes in expected extreme precipitation magnitude from current to future period—were computed for grid cells from the downscaled climate datasets containing National Oceanic and Atmospheric Administration Atlas 14 stations in central and south Florida. Change factors for specific durations and return periods may be used to scale the National Oceanic and Atmospheric Administration Atlas 14 historical depth-duration-frequency values to the period 2050–89 on the basis of changes in extreme precipitation derived from downscaled climate datasets. Model culling was implemented to select downscaled climate models that best captured observed historical patterns of precipitation extremes in central and south Florida. Overall, a large variation in change factors across downscaled climate datasets was found, with change factors generally greater than one and increasing with return period. In general, median change factors were higher for the south-central Florida climate region (1.05–1.55 depending on downscaled climate dataset, duration, and return period) than for the south Florida climate region (1–1.4 depending on downscaled climate dataset, duration, and return period) when considering best performing models for both areas, indicating a projected overall increase in future extreme precipitation events.

Florida↗
USGS2026

Development of projected depth-duration-frequency curves for precipitation in Florida, 2020–59 and 2050–89

The planning, permitting, and design of stormwater-management projects require estimates of the depths of extreme precipitation for current and future events with specified durations and return periods. In this project, precipitation data from six downscaled climate datasets were used to determine changes in precipitation depth-duration-frequency curves from the period 1966–2005 to the periods 2020–59 and 2050–89. The downscaled climate datasets are from the Coupled Model Intercomparison Project Phases 5 and 6 and include (1) Coordinated Regional Downscaling Experiment (CORDEX), (2) Localized Constructed Analogs (LOCA), (3) Multivariate Adaptive Constructed Analogs (MACA), (4) Jupiter Intelligence Weather Research and Forecasting model (JupiterWRF), (5) LOCA version 2 (LOCA2), and (6) National Aeronautics and Space Administration Earth Exchange Global Daily Downscaled Projections (NEX-GDDP). Change factors—multiplicative changes in expected extreme precipitation magnitude from a historical to future period—were computed for grid cells containing National Oceanic and Atmospheric Administration Atlas 14 stations in Florida. Change factors for specific durations and return periods were developed to scale the National Oceanic and Atmospheric Administration Atlas 14 historical depth-duration-frequency values to the periods 2020–59 and 2050–89 on the basis of changes in extreme precipitation derived from six downscaled climate datasets. Overall, a large variation in change factors across downscaled climate datasets was found, with change factors generally being greater than 1 and increasing with return period. In general, median change factors were found to range within 1.01–1.58 for 2020–59 and 1.01–1.63 for 2050–89, depending on the downscaled climate dataset, region, duration, and return period, indicating a projected overall increase in future extreme-precipitation events. When data from all datasets are considered together, median change factors range within 1.04–1.18 for the period 2020–59 and within 1.04–1.23 for the period 2050–89, depending on the region, duration, and return period. Spatial patterns in median change factors were found to vary by dataset.

Florida↗
USGS1975

Dissolved solids, hardness, and orthophosphate of surface-water runoff in the Suwannee River Water Management District, Florida

This atlas consists of three maps that show the general distri bution of dissolved solids, hardness, and orthophosphate in the streams and lakes within the Suwannee River Water Management District. The atlas was prepared in cooperation with the Water Management District to provide pertinent water-quality information relating to the objectives of the Florida State Water Resources Act of 1972. Under the provisions of this act, the Water Management District is required to establish a regional water-use plan, issue permits for water-use and water-resources related construction, and authorize the export of water. The data presented on these maps will be useful to those concerned with water management and use, in assessing regional water quality, and in estab lishing a base for comparison with future quality data. The ranges of concentration shown on the maps represent maximum concentrations in surface water during the sampling period, January 1965- September 1970. Concentrations are plotted at the sampling sites and are the major criteria for determining the extent of concentration ranges. In some cases the drainage basin boundaries are used in defining concentration range boundaries because the quantity and quality of surface runoff is characteristic of the environment of the basin and may be entirely different from the runoff of adjacent basins. Within drainage basins, individual streams and local drainage divides define concentration boundaries. Some areas, although adjacent to each other in the same basin, have entirely different concentration ranges. For example, an area containing dissolved-solids concentrations in the 0-25 mg/1 (milligrams per litre) range may be adjacent to an area in which concentrations exceed 100 mg/1, as in the southeast part of Jefferson County. Concentration boundaries in these areas were selected by extending each range about halfway between the two sampling sites, as opposed to grading an intermediate range between them without supporting data. As the data are sparse in many areas, regional concentration patterns are generalized and local variations may be expected to exist.

Florida↗
USGS1977

The Winona-Tallahatta Aquifer in Mississippi

This aquifer atlas describing the Winona-Tallahatta aquifer is the seventh in a series prepared in cooperation with the Mississippi Board of Water Commissioners. The atlas summarizes the large amount of unpublished data available in the files of the U.S. Geological Survey and it describes the extent, character, and present utilization of the aquifer and its potential for additional development. The Winona-Tallahatta aquifer, which contains freshwater having less than 1,000 mg/liter of dissolved solids in about 25 percent of the State occurs in northwestern and central Mississippi. The water-bearing zones extend into Tennessee and become part of the Memphis aquifer. In Arkansas and Louisiana the aquifer is in the Cane River Formation. The Tallahatta Formation which is the basal unit of the Claiborne Group includes, in ascending order, the Meridian Sand, Basic City Shale, and Neshoba Sand Members. The Winona-Tallahatta aquifer is the source of water for only a few large water users, but is the source of water for hundreds of small-yield domestic and stock wells less than 200 feet deep. Total water use in the State in 1977 from the Winona-Tallahatta is estimated to be about 3 mdg. (Woodard-USGS)

Mississippi↗
USGS1992

Water resources of Massachusetts

This report describes the water resources of Massachusetts. It contains sections describing the location, use, quality, and management of water resources in Massachusetts, followed by a summary of the surface water and ground-water resources of all 27 river basins designated by the State for planning purposes. The data for each basin include information about selected continuous record streamflow-gaging stations, the distribution and size of major lakes and streams, and the character of the principal aquifers. Each basin summary is accompanied by a map that shows basin and political boundaries, hydrography, locations of continuous-record streamflow-gaging stations, and aquifer areas. The aquifer areas were derived from the Hydrologic Investigations Atlases and generally show areas that are likely to yield 100 gallons per minute or more to individual wells. The report was compiled from many reports, including 30 U.S. Geological Survey Hydrologic Investigations Atlases that inventory water resources of the State.

Water-Resources Investigations Report↗
USGS1991

Bibliography of Regional Aquifer-System Analysis Program of the US Geological Survey, 1978-91

The Regional Aquifer-System Analysis (RASA) Program of the U.S. Geological Survey was initiated in 1978. The purpose of this program is to define the regional geohydrology and establish a framework of background information on geology, hydrology, and geochemistry of the Nation's important aquifer systems. This information is critically needed to develop an understanding of the Nation's major ground-water flow systems and to support better management of ground-water resources. As of May 1991, 28 of the Nation's major aquifer systems have been identified for study under this program. Of these, 17 regional aquifer-system studies have been completed, and 8 studies are ongoing. Starting in 1988, the program devoted part of its resources to compilation of a Nationwide ground-water atlas that presents a comprehensive summary of the Nation's major ground-water resources. The atlas, which is designed in a graphical format supported by descriptive text, will serve as a basic reference for the location, geography, geology, and hydrologic characteristics of the major aquifers in the Nation. This bibliography lists the published 876 reports resulting from various studies of the program, from 1978 through May 1991. The list of reports for each study is placed after a brief description of that study.

Water-Resources Investigations Report↗
USGS1997

Bibliography of Regional Aquifer-System Analysis Program of the US Geological Survey, 1978-96

The Regional Aquifer-System Analysis (RASA) Program of the U.S. Geological Survey was initiated in 1978 and was completed in 1995. The purpose of this program was to define the regional geohydrology and establish a framework of background information on geology, hydrology, and geochemistry of the Nation's important aquifer systems. This information is critically needed to develop an understanding of the Nation's major ground-water flow systems and to support better management of ground-water resources. Twenty-five of the Nation's major aquifer systems were studied under this program. Starting in 1988, the program devoted part of its resources to compilation of a National Ground Water Atlas that presets a comprehensive summary of the Nation's major ground-water resources. The atlas, which is designed in a graphical format supported by descriptive text, serves as a basic reference for the location, geography, geology, and hydrologic characteristics of the major aquifers in the Nation. This bibliography lists 1,105 reports that result from various studies of the program. The list of reports for each study follows a brief description of that study.

Water-Resources Investigations Report↗
USGS2002

Prioritizing High-Temperature Geothermal Resources in Utah

The Utah Geological Survey and the Utah Energy Office recently released geothermal resource information for Utah as a "digital atlas." We are now expanding this project to include economic analyses of selected geothermal sites and previously unavailable resource information. The enhancements to the digital atlas will include new resource, demographic, regulatory, economic, and other information to allow analyses of economic factors for comparing and ranking geothermal resource sites in Utah for potential electric power development. New resource information includes temperature gradient and fluid chemistry data, which was previously proprietary. Economic analyses are based upon a project evaluation model to assess capital and operating expenses for a variety of geothermal powerplant configuration scenarios. A review of legal and institutional issues regarding geothermal development coupled with water development will also be included.

Conference Paper↗
USGS1970

Field trip guidebook to the hydrogeology of the Rock-Fox River basin of Southeastern Wisconsin

On this trip we will examine some hydrogeologic characteristics of glacial features and emphasize ground-water management within the Rock-Fox River basin. Field stops will include the hydrogeology of a classical glacial terrane--the Kettle moraine--and the management of ground-water resources for industrial, municipal, agricultural, and fish-culture purposes. Descriptions of the geology, soils, water availability and characteristics, water quality, water use, and water problems within the basin are given in the accompanying U.S. Geological Survey Hydrologic Atlas (HA-360). This atlas is a product of the cooperative program of University Extension--the University of Wisconsin Geological and Natural History Survey.

Wisconsin↗
USGS1896

Pocahontas folio, Virginia-West Virginia

The territory represented by the Pocahontas atlas sheet is one-quater of a square degree of the earth's surface, extending from latitude 37° on the south to 37° 30' on the north, and from longitude 81° on the east to 81° 30' on the west. Its average width is 27.5 miles, its length 34.5 miles, and its area 951 square miles.

Virginia, West Virginia↗
USGS1896

Yellowstone National Park folio, Wyoming

The area covered by the maps of the Yellowstone National Park folio is represented upon four atlas sheets, known as the Gallatin, Canyon, Lake, and Shoshone sheets, and is embraced between the parallels of 44° and 45° north latitude and the meridians of 110° and 111°. It is situated in the northwest corner of the State of Wyoming, and includes 3,412 square miles.

Wyoming↗
USGS1903

Hartville folio, Wyoming

The Geological Survey is making a geologic map of the United States, which necessitates the preparation of a topographic bas map. The two are being issue together in the form of an atlas, the parts of which are called folios. Each folio consists of a topographic base map and geologic maps of a small area of country, together with explanatory and descriptive texts.

Wyoming↗
USGS1965

Calcium, sodium, sulfate, and chloride in stream water of the western conterminous United States to 1957

This Hydrologic Atlas shows concentrations of calcium, sodium (or sodium plus potassium), sulfate, and chloride in stream water of 11 of the Western States, regardless of the sources from which the mineral constituents came. The maps are, in a sense, a historical summary, showing concentrations observed to 1956 and reported in published references. Data on chemical quality of stream water has been obtained at various times and at various places; for no single year does the record even approach complete coverage of the area shown on the maps. It was necessary, therefore, to combine the records of many years in order to achieve this summary.

Hydrologic Atlas↗
USGS1971

Hydrogeology of the Pine Ridge Indian Reservation, South Dakota

An investigation of the geology and ground-water resources of the Pine Ridge Indian Reservation, South Dakota, was made at the request of the Bureau of Indian Affairs as part of the U.S. Department of the Interior's program for the development of the Missouri River basin. The area of investigation (about 3,930 square miles) includes all the land within the original boundaries of the Reservation, except for that part of Bennett County south of the U.S. Highway 18, where there are only small tracts of Indian land. Emphasis in the study was placed on mapping major rock units and on determining their potential as sources of water for domestic and stock use. The geologic map on sheet 1 shows the areal extent of the major rock units, and a summary of the stratigraphy and physical characteristics of the exposed geologic formations is given in the table on this sheet. The writers appreciate the cooperation of the personnel of the South Dakota State Geological Survey, who provided most of the well data for Bennett County, information about the stratigraphy and geology of selected areas, and copies of published and unpublished geologic maps. (See map showing areas mapped prior to this investigation.) Also, they appreciate the cooperation of ranch owners and tenants, who permitted access to their lands, and the personnel of the Bureau of Indian affairs, who supplied soils mps and other data. Data on which this report is based, including logs of wells and test holes, chemical analyses of water and records of wells and springs, have been summarized by the authors in a basic-data report published jointly by the South Dakota Geological Survey and South Dakota Water Resources Commission (Water Resources Report 4, Basic hydrogeologic data - Pine Ridge Indian Reservation, South Dakota). A selected bibliography of reports pertaining to the geology of the area has been included in the basic-data report. This atlas will be more useful if studied in conjunction with a copy of the basic-data report.

South Dakota↗
USGS1969

Water resources of Wisconsin: Rock-Fox River basin

PURPOSE AND SCOPE The purpose of this report is to describe the physical environment, availability, distribution, characteristics, movement, quality, water problems, and use of water within the Rock-Fox River basin in order to aid in planning future water management within the basin. This report presents general information on the basin that was derived from data obtained from Federal, State, and local agencies. In addition, new data were collected from areas where available data were scarce. The reader is referred to the section entitled “Agencies Having Additional Information” and to the list of selected references (sheet 4) for sources of more detailed information. This atlas is one of a series of 12 river-basin studies designed to describe in general terms the water resources of the State. More detailed studies of problem areas will be required in the future as the need for additional information increases. LOCATION AND EXTENT The Rock-Fox River basin in Wisconsin, covers about 4,750 square miles in the southeastern part of the State. It includes all or parts of the following 13 counties: Columbia, Dane, Dodge, Fond du Lac, Green Lake, Jefferson, Kenosha, Milwaukee, Racine, Rock, Walworth, Washington, and Waukesha. It includes the area drained by the Rock, Fox, and Des Plaines Rivers within the State of Wisconsin. Although the basin boundary is the topographic divide, part of the streamflow is derived from ground water that drains from an area similar to, but not having the same boundaries as, the topographic basin. The ground-water basin covers about 4,350 square miles, 400 square miles less than the topographic basin. Most of the reduction in basin area is along the eastern side of the basin.

Wisconsin↗
USGS1971

Water resources of Wisconsin — Central Wisconsin River basin

LOCATION AND EXTENT OF STUDY AREA The central Wisconsin River basin is the middle part of the entire Wisconsin River basin. The basin is about 5,050 square miles in area, and extends about 110 miles south from Merrill to Wisconsin Dells. The basin includes all or parts of the following counties: Adams, Clark, Columbia, Jackson, Juneau, Langlade, Lincoln, Marathon, Marquette, Monroe, Portage, Sauk, Taylor, Waushara, and Wood. PURPOSE AND SCOPE This study provides a background of hydrologic knowledge suitable for use by water-resource planners and managers, and it provides a framework for more detailed water-resource studies in the future. Specifically, the purposes of this report are to: (1) Describe the geologic and hydrologic environments of the central Wisconsin River basin. (2) Describe the water resources of the central Wisconsin River basin including their sources, uses, quality, interrelationships, availability, and behavior within the basin environment. Much of the information in this report has been generalized to allow presentation in the atlas format. Liberal use was made of available data from many sources and interpretations from published reports. Additional material was collected and analyzed to allow a balanced presentation on water resources and the physical environment. This study is part of an investigation of the water resources of the major river basins in Wisconsin. The completed basin studies and those being studied are shown on the cover envelope. The information in this report should be adequate for the broad aspects of planning water-resource development and management. However, individual problems and water needs will require more specific information than is given in this report.

Wisconsin↗