Publications

Regional aquifers underlying the 15,600-square-mile Snake River Plain in southern Idaho and eastern Oregon was studied as part of the U.S. Geological Survey's Regional Aquifer-System Analysis program. The largest and most productive aquifers in the Snake River Plain are composed of Quaternary basalt of the Snake River Group, which underlies most of the 10,8000-square-mile eastern plain. Aquifer te

This volume presents statistical summaries of streamflow data for 257 gaging stations with 10 or more years of continuous record through September 1990. The gaging stations are located in Idaho and adjacent States. Volume 2 presents statistical summaries of streamflow data for 76 gaging stations with 5 to 9 years of continuous record, or with records of discharge measurements from springs, through

Water samples were collected from 903 wells in the Boise River Valley, Idaho, from January 1990 through December 1995. Selected well information and analyses of 1,357 water samples are presented. Analyses include physical properties ad concentrations of nutrients, bacteria, major ions, selected trace elements, radon-222, volatile organic compounds, and pesticides.

A comparison of 1970 and 1992 water-table configuration maps for the Boise area shows that the water table has declined about 10 feet in about 90 percent of the area. Declines exceeded 10 feet in about 50 percent of the area, 20 feet in about 10 percent of the area, and 30 feet in about 5 percent of the area. The largest declines were south of the Boise River between the Ridenbaugh and New York Ca

The 35,800-square-mile upper Snake River Basin in eastern Idaho and western Wyoming was one of 20 areas selected for water-quality study under the National Water-Quality Assessment Program. As part of the initial phase of the study, data were compiled to describe the current (1992) and historical aquatic biological conditions of surface water in the basin. This description of natural and human env

The 35,800-square-mile upper Snake River Basin is one of 20 areas studied as part of the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey. Objectives of NAWQA are to study ground- and surface-water quality, biology, and their relations to land-use activities. Major land and water uses that affect water quality in the basin are irrigated agriculture, grazing, a

The U.S. Environmental Protection Agency requires information on the volume and quality of urban storm-water runoff to apply for a permit to discharge this water into the Boise River under the National Pollutant Discharge Elimination System Program. Concentrations of selected chemical constituents in storm runoff were determined from samples collected at four storm-sewer outfalls in Boise from

This report presents hydrographs of water levels in 578 observation wells in the statewide monitoring network during 1944-93. The monitoring network is operated by the U.S. Geological Survey in cooperation with the Idaho Department of Water Resources, Bureau of Reclamation, and other Federal and State agencies.

Many individual springs and groups of springs discharge water from volcanic rocks that form the north canyon wall of the Snake River between Milner Dam and King Hill. Previous estimates of annual mean discharge from these springs have been used to understand the hydrology of the eastern part of the Snake River Plain. Four methods that were used in previous studies or developed to estimate annual m

This volume presents statistical summaries of streamflow data for 76 gaging stations with 5 to 9 years of continuous record, or with records of discharge measurements from springs, through September 1990. The gaging stations are located in Idaho and western Wyoming. Some of the gaging stations at which spring discharge is measured have 10 or more years of record. Volume 1 presents statistical summ

No abstract available.

The U.S. Geological Survey investigated nutrient and trace-element enrichment in Coeur d'Alene Lake, northern Idaho, during 1991-92.  The objectives of the investigation were to characterize limnology, quantify hydrologic and nutrient budgets, and develop a nutrient-load/lake-response model.  The model required bathymetric data to compute mass balances of water and nutrients within many depth laye