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1. COVERAGE STUDY AREA -- Outline of study area boundary of Denver Basin [USGS_ofr02-338_studyarea]
This data set was created to display the outline of the study area as depicted in (Robson and others, 1998). This digital geospatial data set consists of outlines of the study area in the report ...


2. COVERAGE ARAPBASE -- Structure contours of base of upper Arapahoe aquifer [USGS_arapbase]
This data set was created to display the altitude of the base of the upper Arapahoe aquifer as depicted in Robson and others (1998). This digital geospatial data set consists of structure contours ...


3. COVERAGE LFHTOP -- Structure contours of top of Laramie-Fox Hills aquifer [USGS_lfhtop]
This data set was created to display maps of the altitude of the top of the Laramie-Fox Hills aquifer (Robson and others, 1998). This digital geospatial data set consists of structure contours of ...


4. A Coupled Surface Water and Ground-Water Model to Simulate Past, Present, and Future Hydrologic Conditions in DOI Managed Lands [USGS_SOFIA_coupled_sw-gw_model]
This project has two objectives: 1) update and reconfigure the Flow and Transport in a Linked Overland/Aquifer Density-Dependent System (FTLOADDS) modeling code to include all version modifications ...


5. Configuration of the Base of the Surficial Aquifer System in Dade County, USGS WRIR 90-4108, figure 13 [USGS_SOFIA_dade_config_base_surficial_arc]
Contours of the base of the surficial aquifer system are shown on this map. The base of the aquifer system occurs at a relatively uniform elevation of 180 to 220 ft. below sea level over most of Dade ...


6. Linking Land, Air and Water Management in the Southern Everglades and Coastal Zone to Water Quality and Ecosystem Restoration: Task 2, Sulfur and Nutrient Contamination, Biogeochemical Cycling, and Effects [USGS_SOFIA_LinkingLandAirManagement_Task2]   PARENT DIF
The scientific focus of this project is to examine the complex interactions (synergistic and antagonistic) of contaminants (externally derived nutrients, mercury, sulfur, pesticides, herbicides, polycyclic ...


7. Blue Water Footprint of National Production [geodata_2252]
Blue water footprint ? Volume of surface and groundwater consumed as a result of the production of a good or service. Consumption refers to the volume of freshwater used and then evaporated or incorporated ...


8. Water Resources - Overlap between Surface Water and Groundwater [geodata_1947]
Overlap between surface water and groundwater: Part of the renewable water resources which is common to both surface water and groundwater. It is equal to groundwater drainage into rivers (typically, ...


9. Water Resources - Total Internal Renewable [geodata_1004]
Total Internal renewable water resources (IRWR): long-term average annual flow of rivers and recharge of aquifers generated from endogenous precipitation. Double counting of surface water and groundwater ...


10. GIS Coverage for the National Water-Quality Assessment (NAWQA) Program Retrospective Database for Nutrients in Surface Water: Monitoring Locations [NAWQAHIS]
The retrospective database is a compilation of historical water-quality and ancillary data collected before NAWQA Study Units initiated sampling in 1993. This coverage contains the point locations ...


11. GIS Coverage of the National Water-Quality Assessment (NAWQA) Program Trace Elements Sampling Sites for the EPA Clean Air Mapping and Analysis Program (C-MAP) [NAWQA_TE]
This is a point coverage of the sampling sites for the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program Study-Unit investigations of Trace Elements for the conterminous United ...


12. GIS Coverage of the National Water-Quality Assessment Study-Unit Investigations in the conterminous United States (NAWQA) [NAWQA]
This is a coverage of the boundaries and codes used for the U.S. Geological Survey National Water-Quality Assessment (NAWQA) Program Study-Unit investigations for the conterminous United States, excluding ...


13. Maryland Biological Stream Survey [MD_DNR_BSS]
The Maryland Biological Stream Survey developed as a response to questions raised by the Maryland Synoptic Stream Survey of 1987 (see "Acid Deposition" pages for full discussion) and the MBSS Pilot ...


14. WRIR 99-4036-Ground-Water and Water-Chemistry Data for the Willamette Basin, Oregon [WRIR_99_4036]
This report presents ground-water data collected and compiled as part of a study of the ground-water resources of the Willamette River Basin, Oregon. The report includes tabulated information and ...


15. Digital boundaries of the Antlers aquifer in southeastern Oklahoma [USGS_OFR_aqbound]
This data set was created for a project to develop data sets to support ground-water vulnerability analysis. The objective was to create and document a digital geospatial data set from a published ...


16. Estimated Water Use in Puerto Rico, 2000 [USGS_OFR_2005_1201]
Water-use data were compiled for the 78 municipios of the Commonwealth of Puerto Rico for 2000. Five offstream categories were considered: public-supply water withdrawals, domestic self-supplied water ...


17. National Atlas of the United States of America from the U.S. Geological Survey (USGS) [USGS_NATIONALATLAS]
The National Atlas updates a large bound collection of paper maps that was published in 1970. Like its predecessor, this edition promotes greater national geographic awareness. It delivers ...


18. Estimates for Self-Supplied Domestic Withdrawals and Population Served, for Selected Principal Aquifers, Calendar Year 2005 [USGS_OFR_2010_1223]
The National Water-Quality Assessment Program of the U.S. Geological Survey has groundwater studies that focus on water-quality conditions in principal aquifers of the United States. The Program specifically ...


19. Right-to-Know GIS Atlas of the United States [Right_to_Know]
The Right-to-Know GIS Atlas of the United States CD is a comprehensive collection of public knowledge GIS data. The maps work with the free ArcExplorer GIS viewer, ArcView GIS, and many other GIS ...


20. Groundwater-Surface Water Interactions and Relation to Water Quality in the Everglades [USGS_SOFIA_gw-sw_wq_everglades]
At present there are few reliable estimates of hydrologic fluxes between groundwater and surface water in the Everglades. This gap in hydrological investigations not only leaves the water budget of ...


21. Hydrological Map of the Arab Region and the Adjacent Areas; 1988 [CE1d0027_173]
This data asset contains various layers / coverages, such as: - Polygon features that describe aquifer types and its characteristics. - Hydrological point features that describe the ground water quality ...


22. LBA-ECO LC-04 MACROHYDROLOGICAL ROUTING DATA FOR THE AMAZON AND TOCANTINS RIVER BASIN [LC04_MACROHYDROLOGY]
This data set provides continental-scale hydrological river flow routing parameter data for the Amazon and Tocantins River basins at 5 minute (~9 km) resolution (Costa et al., 2002). The data set ...


23. Ground Water Atlas of the United States: Alaska [ggd617]
The Ground Water Atlas of the United States includes summary information on permafrost in Alaska, and the relation of permafrost and ground water. The Atlas includes figures showing permafrost zones ...


24. Data on freshwater and hydrochemistry in the Antarctic Peninsula region. [CNDP-ESP_GEOANT-UAM_Freshwater]   PARENT DIF
In English: Surface freshwater, snow and groundwater studies in the Antarctic Peninsula region and Ellsworth Mountains. Hydrochemical data. From projects of the research group on Geology of the University ...


25. Data on geomorphology, neotectonics, soils, permafrost and freshwater in the Antarctic Peninsula region. [CNDP-ESP_GEOANT-UAM]   CHILD DIFs
In English: This dataset contains registered data on studies carried out by the research group on Geology from the University Autonoma of Madrid (GEOANT). Data about geomorphology, neotectonics, ...


26. Altitude of the base of the gray limestone aquifer, southern Florida, USGS WRIR 99-4213 figure 15 [USGS_SOFIA_glime_altbase_arc]
The base of the gray limestone aquifer is shallowest in Collier and Hendry Counties and slopes to the southeast and east. The altitude of the base of the aquifer generally ranges from 50 to 160 ft ...


27. Altitude of the base of the surficial aquifer system in eastern Palm Beach, Martin, and St. Lucie counties, Florida, USGS WRIR 99-4214, fig. 1 [USGS_SOFIA_ch1999cont_arc]
The surficial aquifer system underlies Palm Beach, Martin, and St. Lucie Counties and primarily consists of sand, clay, silt, shell, and limestone of Holocene, Pleistocene, and Pliocene age. Its thickness ...


28. Altitude of the top of the gray limestone aquifer, southern Florida, USGS WRIR 99-4213 figure 14 [USGS_SOFIA_glime_alttop_arc]
The top of the gray limestone aquifer is shallowest in Collier and Hendry Counties and slopes to the southeast and east. The altitude of the top of the gray limestone aquifer generally ranges between ...


29. Altitude of the top of the upper confining unit of the gray limestone aquifer, southern Florida, USGS WRIR 99-4213 figure 21 [USGS_SOFIA_glime_alt_ucu_arc]
The map shows the altitude of the top of the confining unit which ranges from 10 ft above sea level to 50 ft below sea level in much of the study area, and slopes downward to the east and southeast. ...


30. Approximate Eastern Limit of the Gray Limestone Aquifer in Broward County, USGS WRIR 87-4034, figure 36 [USGS_SOFIA_glime_limit_brwd_east_arc]
An investigation of the surficial aquifer system in Broward County, begun in 1981, is part of a regional study of the aquifer system in southeast Florida. Test drilling for lithologic samples, flow ...


31. Approximate Eastern Limit of the Gray Limestone Aquifer in Dade County, USGS WRIR 90-4108, figure 14 [USGS_SOFIA_glime_limit_dade_east_arc]
An aquifer identified by Fish (1988) in Broward County, composed of predominantly gray (in places, greenish-gray or tan) limestone of the lower part and locally the middle part of the Tamiami Formation, ...


32. Approximate Western Limit of the Biscayne Aquifer in Dade County, USGS WRIR 90-4108, figure 16 [USGS_SOFIA_dade_biscayne_limit_west_arc]
The map shows the approxiamte western limit of the Biscayne aquifer in Miami-Dade County. Southeastern Florida is underlain by geologic units of varying permeability from land surface ...


33. Approximate Western and Northern Limit of the Biscayne Aquifer in Broward County, USGS WRIR 87-4034, figure 37 [USGS_SOFIA_brwd_biscayne_limit_west_arc]
The approximate western and northern limits of the Biscayne aquifer are shown in this map. The limit is drawn where the thickness of very highly permeable limestone or calcareous sandstone is estimated ...


34. Configuration of the Base of the Biscayne Aquifer in Dade County, USGS WRIR 90-4108, figure 16 [USGS_SOFIA_dade_config_base_biscayne_arc]
The map shows the altitude below sea level of the base of the Biscayne aquifer in Miami-Dade County. The contour interval is 10 feet. Southeastern Florida is underlain by geologic units ...


35. Configuration of the Base of the Gray Limestone Aquifer in Dade County, Fl, USGS WRIR 90-4108, figure 15 [USGS_SOFIA_dade_config_base_glime_arc]
Contours of the altitude below sea level of the base of the highly permeable gray limestone aquifer in the Tamiami Formation are shown in this map. The aquifer, as mapped, includes all intervals of ...


36. Configuration of the Top of the Gray Limestone Aquifer in Dade County, USGS WRIR 90-4108, figure 14 [USGS_SOFIA_dade_config_top_glime_arc]
Contours of the elevation of the top of the highly permeable gray limestone aquifer in the Tamiami Formation are shown in this map. The aquifer, as mapped, includes all intervals of the gray limestone ...


37. Everglades Hydrology and Water Quality Data [USGS_SOFIA_ever_hydro_wq_data]
At present there are few reliable estimates of hydrologic fluxes between groundwater and surface water in the Everglades. This gap in hydrological investigations not only leaves the water budget of ...


38. Extent of gray limestone aquifer (interpreted to be unconfined), southwestern Florida, USGS WRIR 99-4213, figure 29 [USGS_SOFIA_glime_ext_aq_polygon]
Leakance, which is the vertical hydraulic conductivity of the confining unit divided by its thickness, can be used to provide an indication of the degree of confinement of the aquifer. For purposes ...


39. Generalized Configuration of the Base of the Biscayne Aquifer in Broward County, USGS WRIR 87-4034, figure 37 [USGS_SOFIA_brwd_config_base_biscayne_arc]
The base of the Biscayne aquifer are shown in this map. The base is drawn on the bottom of highly permeable limestone or sandstone in the Tamiami Formation that is virtually contiguous with overlying ...


40. Generalized Configuration of the Base of the Gray Limestone Aquifer in Broward County, USGS WRIR 87-4034, figure 36 [USGS_SOFIA_brwd_glime_altbase_arc]
This map contains contours of the base of the highly permeable gray limestone aquifer in the Tamiami Formation. The contour interval is 10 feet. Provide fundamental background information ...


41. Generalized Configuration of the Base of the Surficial Aquifer System in Broward County, USGS WRIR 87-4034, figure 35 [USGS_SOFIA_brwd_config_base_surficial_arc]
This map shows the altitude of the base of the surficial aquifer system below sea level. In addition to the test holes drilled in this study, eight others from Parker and others (1955) or from the ...


42. Generalized Configuration of the Top of the Gray Limestone Aquifer in Broward County, USGS WRIR 87-4034, figure 36 [USGS_SOFIA_brwd_glime_alttop_arc]
This is map contains contours of the top of the highly permeable gray limestone aquifer in the Tamiami Formation. The contour interval is 10 feet. Provide fundamental background information ...


43. Geochemical Parameters to Evaluate Aquifer Storage and Recovery Reactions with Native Water and Aquifer Materials [USGS_SOFIA_geochem_asr_lo]
The objective of this project was to determine geochemically significant water-quality characteristics of possible aquifer storage and recovery (ASR) source and receiving waters north of Lake Okeechobee ...


44. Limit of Gray Limestone Aquifer, Southeastern Florida, USGS WRIR 99-4213 [USGS_SOFIA_glime_limit_arc]
The maps shows the limit of the gray limestone aquifer in southern Florida. The lower Tamiami aquifer is mapped as being present in most of western and northeastern Hendry County, which are outside ...


45. Limit of the Upper Confining Unit of the Gray Limestone Aquifer, Southwestern Florida, USGS WRIR 99-4213, fig. 21 [USGS_SOFIA_glime_lim_ucu_arc]
The upper confining unit of the gray limestone aqifer in southwestern Florida ranges from 20 to 60 ft in thickness in most of the study area, but is absent to the west and southwest in much of Collier ...


46. Postulated Fault in the Gray Limestone Aquifer, Collier county, Fl, USGS WRIR 99-4213 figure 15 [USGS_SOFIA_glime_fault_arc]
A northwest-southeast trending fault is suggested in eastern Collier County based on well-control data for the base of the gray limestone aquifer. Displacement could be as large as 60 ft. The northeast ...


47. Thickness of the Gray Limestone Aquifer, Southern Florida, USGS WRIR 99-4213 figure 16 [USGS_SOFIA_glime_thkness_arc]
The thickness of the gray limestone aquifer generally ranges from 30 to 100 ft. The map shows the thickness of the gray limestone aquifer in southern Florida. The contour interval is 50 feet. ...


48. Thickness of the upper confining unit of the gray limestone aquifer, southern Florida, USGS WRIR 99-4213 figure 22 [USGS_SOFIA_glime_thk_ucu_arc]
The upper confining unit of the gray limestone aquifer ranges from 20 to 60 ft in thickness in most of the study area, but is absent to the west and southwest in much of Collier County and most of ...


49. Traces of hydrogeologic sections A-A', A'-A", B-B', and C-C' in the study area, southern Florida, WRIR 99-4213 figure 9 [USGS_SOFIA_glimehydrogeo_arc]
Four hydrogeologic sections show lithostratigraphic units and structure in the study area. Hydrogeologic sections A-A' and A'-A" extend northwest to southeast from southern Hendry County to southern ...


50. Non-Potential Drinking Water Source Areas [MassGIS_GISDATA.NPDWSA_POLY]
Non-Potential Drinking Water Source Areas (NPDWSA) are regulatory in nature, representing one of many considerations used in determining the standards to which ground water must be cleaned in the ...


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