Dissolved nutrient and suspended particulate matter data for the San Francisco Bay estuary, California, October 1991 through November 1993
Stephen W. Hager
1994, Open-File Report 94-471
The U.S. Geological Survey conducted hydrologic investigations in San Francisco Bay between October 1991 and November 1993. Dissolved inorganic plant nutrients, nitrate, nitrite, ammonium, silica, and reactive phosphorus were measured in surface and in near-bottom waters at previously established locations in both northern and southern reaches of the bay. Salinity,...
Comparison of vertical discretization techniques in finite-difference models of ground-water flow; example from a hypothetical New England setting
Philip T. Harte
1994, Open-File Report 94-343
Proper discretization of a ground-water-flow field is necessary for the accurate simulation of ground-water flow by models. Although discretiza- tion guidelines are available to ensure numerical stability, current guidelines arc flexible enough (particularly in vertical discretization) to allow for some ambiguity of model results. Testing of two common types of...
Flood data for the Sacramento River and Butte Basin, Sacramento Valley, California, 1980-90
Jerry G. Harmon
1994, Open-File Report 93-68
Floodflows and peak states of floods were measured and channel cross sections were surveyed at sites along the Sacramento River and in Butte Basin, Sacramento Valley, California, during 1980-90 to document magnitudes of flooding and channel changes. The study reach extends from rivermile 200 near Hamilton City to rivermile 134...
Potentiometric surface of the intermediate aquifer system, west-central Florida, May 1994
P. A. Metz, D. L. Brendle
1994, Open-File Report 94-529
A map of the May 1994 potentiometric surface of the intermediate aquifer system in west-central Florida depicts water levels for the annual low water-level period. Water levels were generally lower than those reported for May 1993. In 135 wells with paired measurements, the May 1994 water levels averaged about 3.84...
Particulate carbon and nitrogen and suspended particulate matter in the Sacramento River at Rio Vista, California, January 3 - May 26, 1983 and October 31, 1983 - November 29, 1984
Stephen W. Hager
1994, Open-File Report 94-470
Particulate matter was collected at Rio Vista, California, in two study periods; the first, from January 3 to May 26, 1983; the second from October 31, 1983 to November 29, 1984. Concentrations of suspended particulate matter were measured gravimetrically on silver membrane filters. The pooled standard deviation on replicated samples...
Temporal, spatial and petrologic variations of lava flows from the Mount Bachelor volcanic chain, central Oregon High Cascades
Cynthia A. Gardner
1994, Open-File Report 94-261
Preliminary geologic map of the Sitka quadrangle and parts of the Sitka SW, Sugarloaf, and Trout Creek quadrangles, Clark County, Kansas
M. W. Green, G. M. Fairer
1994, Open-File Report 94-658
No abstract available....
Historical land-use changes and potential effects on stream disturbance in the Ozark Plateaus, Missouri
Robert B. Jacobson, Alexander T. Primm
1994, Open-File Report 94-333
Land-use changes have been blamed for creating disturbance in the morphology of streams in the Ozark Plateaus, Missouri (hereafter referred to as the Ozarks). Historical evidence and stratigraphic observations document that streams have been aggraded by substantial quantities of gravel beginning sometime at or near the time of European settlement...
Preliminary determination of epicenters; monthly listing April-June 1994
National Earthquake Information Center
1994, Open-File Report 94-600-B
Preliminary geologic map of the Mount Jesus Quadrangle and parts of the Mount Jesus NW, Lexington, and Turkey Creek quadrangles, Clark County, Kansas
M. W. Green, G. M. Fairer
1994, Open-File Report 94-656
Bibliography of well-log applications, annual update; October 1, 1993 to September 30, 1994
Stephen E. Prensky
1994, Open-File Report 94-652-A
Guidelines for collecting and processing samples of stream bed sediment for analysis of trace elements and organic contaminants for the National Water-Quality Assessment Program
Larry R. Shelton, Paul D. Capel
1994, Open-File Report 94-458
A major component of the U.S. Geological Survey's National Water-Quality Assessment program is to assess the occurrence and distribution of trace elements and organic contaminants in streams. The first phase of the strategy for the assessment is to analyze samples of bed sediments from depositional zones. Fine-grained particles deposited in...
Water-quality, lithologic, and water-level data for wells in Tulare Basin, Kings, Kern, and Tulare Counties, California, August 1990 to February 1993
Sherrill Beard, Roger Fujii, W. Gary Shanks
1994, Open-File Report 94-334
Much of the Tulare Basin is characterized by saline shallow ground water containing elevated concen- trations of arsenic, selenium, and other trace elements. A comprehensive investigation of ground-water geochemist, and, to a limited extent, hydrology was initiated in response to concerns related to (1) adverse effects on migratory waterfowl of...
Simulation of the effects of ground-water withdrawals and recharge on ground-water flow in Cape Cod, Martha's Vineyard, and Nantucket Island basins, Massachusetts
John P. Masterson, Paul M. Barlow
1994, Open-File Report 94-316
The effects of changing patterns of ground-water pumping and aquifer recharge on the surface-water and ground-water hydrologic systems were determined for the Cape Cod, Martha's Vineyard, and Nantucket Island Basins. Three-dimensional, transient, ground-water-flow modelS that simulate both freshwater and saltwater flow were developed for the f1ow cells of Cape Cod...
Ground-water quality and geochemistry, Carson Desert, western Nevada
Michael S. Lico, R. L. Seiler
1994, Open-File Report 94-31
Aquifers in the Carson Desert are the primary source of drinking water, which is highly variable in chemical composition. In the shallow basin-fill aquifers, water chemistyr varies from a dilute calcium bicarbonate-dominated water beneath the irrigated areas to a saline sodium chloride- dominated water beneath unirrigated areas. Water samples from...
ALK.BIB : a selected bibliography of alkaline igneous rocks and related mineral deposits, with an emphasis on western North America
Felix E. Mutschler, D. Chad Johnson, Thomas C. Mooney
1994, Open-File Report 94-624-A
Water resources activities of the Mississippi District, 1993-94
Carol P. Moss
1994, Open-File Report 94-452
Earthquake data report, May 1994
National Earthquake Information Center
1994, Open-File Report 94-605-B
Earthquake data report, June 1994
National Earthquake Information Center
1994, Open-File Report 94-606-B
Assessment of the hydrologic interaction between Imikpuk Lake and the adjacent airstrip site near Barrow, Alaska, 1993
Kathleen A. McCarthy, Gary L. Solin, Dennis Trabant
1994, Open-File Report 94-367
Imikpuk Lake serves as the drinking water source for the Ukpeagvik Inupiat Corporation-National Arctic Research Laboratory (UIC-NARL), formerly known as the Naval Arctic Research Laboratory, near Barrow, Alaska. During the 1970's and 1980's, accidental releases of more than 1,300 cubic meters of various types of fuel occurred at the airstrip...
Preliminary bedrock geologic map of the Plymouth quadrangle and eastern portion of the Killington Peak quadrangle, Windsor and Rutland Counties, Vermont
Gregory J. Walsh, Nicholas M. Ratcliffe
1994, Open-File Report 94-225-A
No abstract available....
Preliminary bedrock geologic map of the Plymouth Quadrangle and eastern portion of the Killington Peak Quadrangle, Windsor and Rutland counties, Vermont
Gregory J. Walsh, Nicholas M. Ratcliffe
1994, Open-File Report 94-225-B
Earthquake data report, April 1994
National Earthquake Information Center
1994, Open-File Report 94-604-B
Earthquake data report, April 1994
National Earthquake Information Center
1994, Open-File Report 94-604-A
Methods of analysis and quality-assurance practices of the U.S. Geological Survey organic laboratory, Sacramento, California: Determination of pesticides in water by solid-phase extraction and capillary-column gas chromatography/mass spectrometry
Kathryn L. Crepeau, Joseph L. Domagalski, Kathryn Kuivila
1994, Open-File Report 94-362
Analytical method and quality-assurance practices were developed for a study of the fate and transport of pesticides in the Sacramento-San Joaquin Delta and the Sacramento and San Joaquin River. Water samples were filtered to remove suspended parti- culate matter and pumped through C-8 solid-phase extraction cartridges to extract the pesticides....
