Search USGS⌕ Search

SEARCH · Search USGS

Results for “Topographic Map”

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 451 records · Page 25Linked to original sources
USGS1960

The physiographic provinces of Alaska

The wealth of recently accumulated geographic information on Alaska has made desirable a new classification of the state into physiographic divisions. Most of Alaska is now covered by topographic maps of high quality at scales of 1:63,360 and 1:250,000, prepared by multiplex methods from aerial photography. A classification made now is not likely to err through lack of knowledge of the geography and topography of the state; any changes it requires will reflect matters of judgment and taste, rather than ignorance. The accompanying classification was prepared intermittently between 1949 and 1959; most of the work was done between 1956 and 1959. It is hoped that it will bring about a clearer understanding of the geography of Alaska and will stimulate research into the history of development of Alaskan landforms.

Alaska↗
USGS1968

Flood profile study, Squaw Creek, Linn County, Iowa

This report is the result of a cooperative agreement between the city of Cedar Rapids and the U.S. Geological Survey that provides for the collection of hydrologic data by the Geologic Survey on small streams in and near the city. The city furnished the large-scale topographic map showing a stream reference line marked off in 100-foot stations and a part of the data on valley cross sections used in the preparation of this report. The purpose of this report is to show, for an 18,000-foot reach of Squaw Creek, (1) flood-inundation limits for a large flood under present channel and valley conditions, and (2) water-surface profiles for the above flood and for a lesser flood contained in a waterway restricted by two assumed degrees of encroachment. Mean velocities are also given at many places for the selected conditions. The information provided can be useful to State and local agencies involved in floodplain management. The purpose of this report is to show, for an 18,000-foot reach of Squaw Creek, (1) flood-inundation limits for a large flood under present channel and valley conditions, and (2) water-surface profiles for the above flood and for a lesser flood contained in a waterway restricted by two assumed degrees of encroachment. Mean velocities are also given at many places for the selected conditions. The information provided can be useful to State and local agencies involved in flood-plain management.

Iowa↗
USGS1968

Alaska Railroad Terminal Reserve, Anchorage, soil-stability study: Stability in the vicinity of boring lines 1 and 2

This report has been prepared in response to a request dated April 22, 1966, from the General Manager of The Alaska Railroad to the Director, U.S. Geological Survey, for an evaluation of the propriety of continued industrial expansion on land contained within The Alaska Railroad Terminal Reserve and nearby. It is based on field examination June 8-12, 1966, in company with Messrs. E. B. Eckel and E. G. Dobrovolny, field work September 19-October 3, 1966, and May 1-June 4, 1967, on discussions with the staff of The Alaska Railroad, my colleagues, and Professor H. B. Seed of the University of California, and on review of published and unpublished material pertinent to the area and its problems. During the fall of 1966 a detailed topographic map of the port area was prepared for The Alaska Railroad by Jay Whiteford and Associates. During late 1966 and early 1967 a drilling, sampling and soils testing program in an area of immediate interest along Boring Lines 1 and 2 was made by Adams, Corthell, Lee, Wince, and Associates (ACLW), a consultant engineering firm, under contract to The Alaska Railroad. Most of the basic data used in this report for stability analyses, such as the geometry of the ground surface and the physical properties of the materials, was derived from the Whiteford map and the ACLW investigations.

Alaska↗
USGS1973

Relation of channel slope to reaeration of Michigan streams

Reaeration coefficients (k 2 ), which are rate constants for the process of oxygen absorption from the atmosphere, have been computed for Michigan's streams using an equation developed by Bennett and Rathbun (1972). Mean velocity and mean depth data, which are necessary for the computation, have been extracted from discharge measurements made at gaging stations throughout the State. The computed k 2 values have been related to channel slopes obtained from topographic maps. Regression equations have been derived that express the relation of k 2 to slope for streams at mean flow, median flow, 7-day 2-year low flow, and 7-day 10-year low flow. The equations indicate that an increase in channel slope or a decrease in streamflow increases k 2 .

Michigan↗
USGS1974

Drainage area and river mileage of Nebraska streams part I

The value of stream discharge data for hydrologic studies is enhanced by the availability of accurate information on size of area drained, distance between selected sites along stream course, and hydraulic gradients. Information on the location of cultural and natural features that affect streamflow also is valuable for hydrologic studies, particularly those that involve engineering considerations. Although stream-discharge data have been collected for many years and at many points, relatively little accurate information on the physical features of the areas drained has been compiled. In the past, such information was compiled only when occasion demanded, and owing to a general lack of detailed topographic maps, many of the values obtained were not precise by present-day standards.

Nebraska↗
USGS1974

Geological Survey published reports on Alaska, 1940-1959, indexed by quadrangle

Geological Survey reports published as Professional Papers, Bulletins, Water Supply Papers, and Circulars are listed by the quadrangles (scale 1:250,000) into which Alaska has been divided for topographic mapping (p. 2). This index does not include reports that deal only with administrative matters or that were placed in open files but not formally published. Reports that deal with Alaska as a whole, with areas that cannot be identified with any specific quadrangle, or with offshore areas that are not within quadrangle boundaries, or that consist mainly of statistical data on the quality or quantity of water are listed under ALASKA - GENERAL, as are bibliographies, indexes, and similar publications. The ALASKA - GENERAL list appears before the alphabetically arranged quadrangle listings.

Alaska↗
USGS1974

Proposed hydrologic analyses of streamflow for Brazil

The objective of my assignment was to recommend what hydrologic analyses might be made using the records of stream discharge soon to be available at the gaging stations in Brazil. To attain this objective I (1) examined the streamflow records in part of the Rio Jacui basin in the state of Rio Grande do Sul for quality, length of record, and density of areal coverage; (2) locked at the available topographic maps; (3) spent one day in the field visiting gaging stations and observing general hydrologic conditions and (4) examined an isohyetal map of Brazil. The assignment was accomplished May 6-24, 1974.

Open-File Report↗
USGS1974

Geological Survey published reports on Alaska, 1915-1939, indexed by quadrangle

Geological Survey reports published as Professional Papers, Bulletins, Water Supply Papers, and Circulars are listed by the quadrangles (scale 1:250,000) into which Alaska has been divided for topographic mapping (p. 3). This index does not include reports that deal only with administrative matters or that were placed in open files but not formally published. Reports that deal with Alaska as a whole, with areas that can not be identified with any specific quadrangle, or with offshore areas that are not within quadrangle boundaries, or that consist mainly of statistical data on the quality or quantity of water are listed under ALASKAGENERAL, as are bibliographies, indexes, and similar publications. The ALASKA - GENERAL list appears before the alphabetically arranged quadrangle listings.

Alaska↗
USGS1974

Geological Survey published reports on Alaska, 1884-1914, indexed by quadrangle

Geological Survey reports published as Annual Reports, Monographs, Special Reports, Professional Papers, Bulletins, and Water Supply Papers are listed by the quadrangles (scale 1:250,000) into which Alaska has been divided for topographic mapping (p. 2). This index does not include any reports that deal solely with administrative matters. Reports that deal with Alaska as a whole or with areas that can not be identified with any specific quadrangle are listed under ALASKA - GENERAL, as are bibliographies, indexes, and similar publications. The ALASKAGENERAL list appears before the alphabetically arranged quadrangle listings.

Alaska↗
USGS1974

Selected U.S. Bureau of Mines reports on Alaska indexed by quadrangle

Most U.S. Bureau of Mines reports on the geology and mineral resources of Alaska that were published or placed in open files through April 30, 1974, are listed by the quadrangles (scale 1:250,000) into which Alaska has been divided for topographic mapping (p. 2). References to reports that deal with Alaska as a whole and cannot be readily assigned to individual quadrangles or deal with many scattered parts of the state are listed under ALASKA - GENERAL, which appears before the alphabetically arranged quadrangle listings. References to the Minerals Yearbook, published annually, are not included as this periodical contains mainly statistical data. Also omitted are reports on mining, milling, and metallurgical practices; compilations of coal, oil, and gas analyses unless data on geological occurrences are also given; and reports on permissible explosives, health, and safety. This index is the second in a planned series of specialized lists, arranged by quadrangle, that will facilitate library research on the geology and mineral resources of Alaska. The first in the series is "Geological Survey open-file reports on Alaska indexed by quadrangle," by Edward H. Cobb, which was released as open-file report 74-7 on May 16, 1974.

Alaska↗
USGS1978

Principal facts for a gravity survey of the Fly Ranch Extension Known Geothermal Resource Area, Pershing County, Nevada

During July 1977, forty-four gravity stations were obtained in the Fly Ranch Extension Known-Geothermal Resource Area and vicinity, northwestern Nevada. Elevations for three stations were estimated from lake bed topographic contours. Horizontal and vertical positions for stations FREX33 through FREX43 were determined from plane-table surveying. Positions for the remaining stations were taken from benchmarks or spot elevations shown on U.S. Geological Survey topographic maps at scales of 1:24,000.

Nevada↗
USGS1979

Gazetteer of coal-mine lakes in southwestern Indiana

This gazetteer is a catalog of lakes formed by surface coal mining in southwestern Indiana that are 0.5 acre or larger and in nonactive mine areas. Approximately 1,000 of the lakes are listed by 7.5-minute quadrangle topographic-map name, lake-identification number, latitude and longitude, and county. Other data given are shape of lake, maximum length, mean width, length and development of shoreline, surface area, orientation, presence of a stream inlet or outlet, and geologic data (geologic formation of area surrounding the lake and the mined coal-bed member). Field data (sampling date, pH, specific conductance, apparent color of lake, and general vegetation along the shoreline) were collected for 287 of the lakes. Two hundred eighty-seven lakes were sampled once for pH and specific conductance. Vegetation along the shoreline and apparent color of each lake were identified at the same time. Although these data are not sufficient to quantify the water quality of the lakes, they do illustrate the variability of these characteristics. The pH of the 287 lakes ranged from 2.5 to 10.0; however, the pH of 80 percent of them ranged from 6 to 9. Specific conductance ranged from 99 to 3,800 micromhos per centimeter at 25? Celsius. Specific conductance for approximately 70 percent of the lakes in the Staunton and Brazil formations was less than 500 micromhos per centimeter at 25? Celsius, but for approximately 65 percent in the Dugger and Petersburg Formations it was greater than 1,000 micromhos per centimeter at 25? Celsius. The apparent colors of the lakes observed were varying shades of aqua, blue, brown, lime green, red, and green. Eighty percent of the lakes sampled were green. Lake sizes ranged from a chosen minimum of 0.5 acre to a maximum of 344 acres. Maximum length ranged from 0.1 to 2 miles, and the mean width was generally less than 0.8 mile.

Open-File Report↗
USGS1979

Headwater locations of U.S. streams tributary to St. Lawrence River basin between western Ohio and eastern New York, excluding Lake Champlain basin

The headwater locations of several thousand U.S. streams tributary to Lakes Ontario and Erie and the St. Lawrence and Niagara Rivers, from the Maumee River in Ohio to the western border of the Lake Champlain basin in New York, including parts of Pennsylvania, are listed by quadrangle. The location of the headwater of each is given with reference to cultural and topographic features. ' Headwater ' in this report is defined as the first site downstream from which the average streamflow is 5 cubic feet per second. The site locations were determined from drainage areas as indicated on topographic maps. The size of the drainage area required to produce an average flow of 5 cubic feet per second was determined from equations, developed separately for each State by regression techniques, that define the relation between streamflow and hydrologic factors of the region. Drainage area and precipitation were factors in the equations for all three States: forest cover was found to be significant in Ohio. (Woodard-USGS)

Open-File Report↗
USGS1983

Drainage areas of selected sites on streams in North Carolina

For the past several years, drainage-area data have been determined for approximately 12,400 selected sites on streams in North Carolina. Location information, including distance of nearby towns or other landmarks, latitude and longitude coordinates, county in which the site lies, and the name of the latest topographic maps on which the site is located, are also provided.

North Carolina↗
USGS1983

Drainage-area data for Wisconsin streams

Drainage areas were determined for more than 7,000 sites in Wisconsin's 11 major river basins, including all named streams draining 5 or more square miles, and all unnamed streams draining 10 or more square miles. Also determined are drainage areas for gaging stations, sewage-treatment plants, dams, major highway crossings, and other sites where discharge measurements or water-quality data are available. Drainage areas were delineated on U.S. Geological Survey topographic maps. Drainage areas are shown in tabular form under six headings: station number; stream name, rank, and location; township, range, and section; county; type of site; and drainage area. Eleven major-river-basin maps show the location and station number of key sites.

Wisconsin↗
USGS1984

Drainage areas in New Jersey; Atlantic coastal basins, South Amboy to Cape May

Drainage areas of New Jersey streams in the coastal basin from South Amboy to Cape May are listed for more than 700 sites. Tables list the descriptive location of each site, the latitude and longitude, county, and National Topographic map name. For gaged sites established through 1982, the U.S. Geological Survey station name and site number are also shown. The data are presented alphabetically by stream name and in downstream order. Drainage areas were tabulated for named streams and unnamed streams with a drainage area greater than 5 square miles. The methods used to delineate the drainage divides, measure areas, and determine mouths of streams follow the guidelines developed by the U.S. Water Resources Council. (USGS)

Open-File Report↗
USGS1985

Drainage areas in the Big Sioux River basin in eastern South Dakota

The Big Sioux River basin of eastern South Dakota contains an important surface water supply and a sizeable aquifer system of major importance to the economy of South Dakota. The aquifers are complex, consisting of many small aquifers that are hydrologically associated with several large aquifers and the Big Sioux River. The complexity and interrelation of the surface water/groundwater systems has already created management problems. As development continues and increases, the problems will increase in number and complexity. To aid in planning for future development, an accurate determination of drainage areas for all basins, sub-basins, and noncontributing areas in the Big Sioux River basin is needed. All named stream basins, and all unnamed basins > 10 sq mi within the Big Sioux River basin in South Dakota are shown and are listed by stream name. Stream drainage basins in South Dakota were delineated by visual interpretation of contour information shown on U.S. Geological Survey 77-1/2 minute topographic maps. One table lists the drainage areas of major drainage basins in the Big Sioux River basin that do not have a total drainage area value > 10 sq mi. Another shows the drainage area above stream gaging stations in the Big Sioux River basin. (Lantz-PTT)

Open-File Report↗