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Page 4864, results 121576 - 121600

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Not all publications have extents, not all extents are completely accurate
A summary of phosphate-rock resources of the United States-an analysis of past estimates
James Bachelder Cathcart, Richard Porter Sheldon, Robert A. Gulbrandsen
1981, Open-File Report 81-789
The United States produced in 1980 about 54 million tons of phosphate rock, which was 40 percent of the world production. About 62 percent of this production was exported, 28 percent as phosphate rock and 34 percent is manufactured fertilizers and chemicals. The remainder was used domestically, largely (88 percent)...
Preliminary data report for the San Juan Basin-Crownpoint surveillance study
Peter F. Frenzel, Steven D. Craigg, Elizabeth T. Padgett
1981, Open-File Report 81-484
Geohydrologic data that may be used to predict the effects of mining on Navajo water resources in the San Juan structural basin are reported as well as the current availability of data from other government agencies. Emphasis is on the vicinity of Crownpoint, New Mexico....
Quality assurance practices for the chemical and biological analyses of water and fluvial sediments
Linda C. Friedman, David E. Erdman
1981, Open-File Report 81-650
This chapter contains practices used by the U.S. Geological Survey to assure the quality of analytical data for water, fluvial sediment, and aquatic organisms.These practices are directed primarily toward personnel making water-quality measurements. Some detail specific quality control techniques, others document quality assurance procedures being used by the Central Laboratories...
Probable high ground-water levels in Massachusetts
M. H. Frimpter
1981, Open-File Report 80-1205
Water-level records from an observation-well network are analyzed for utility in estimating probable high ground-water levels in three different geohydrologic environments in Massachusetts. Analyses were made of 83 observation wells with between 8 and 37 years of records. Maximum annual water levels occur most frequently in March and April. The...
Hydrologic effects of highway-deicing chemicals in Massachusetts
L.R. Frost Jr., S.J. Pollock, R.F. Wakelee
1981, Open-File Report 81-209
Methods of estimating annual mean and annual maximum chloride concentrations and sodium concentrations in streams were developed using multiple and simple linear regression techniques and data collected during the 1972-77 water years. Independent variables are easily obtainable parameters such as total salt application within a basin, annual precipitation, and drainage...
Hydrologic effects of highway-deicing chemicals in Massachusetts; executive summary
L.R. Frost Jr., S.J. Pollock, R.F. Wakelee
1981, Open-File Report 81-210
Methods of estimating annual mean and annual maximum chloride concentrations in streams were developed through multiple and simple linear regression techniques using data collected during the 1972-77 water years. Independent variables are easily obtainable parameters, such as total salt application within a basin, annual precipitation, and drainage basin characteristics. Methods...
Water-quality data for the Potomac-Raritan-Magothy aquifer system, Trenton to Pennsville, New Jersey, 1980
Thomas V. Fusillo, Lois M. Voronin
1981, Open-File Report 81-814
Samples for chemical analysis were collected from June to December 1980 from 262 wells tapping the Potomac-Raritan-Magothy aquifer system. The samples were analyzed for common ions, dissolved metals, nutrients, dissolved organic carbon, volatile organic compounds, pH, temperature, and specific conductance. This report contains the results of the analyses, well construction...
Approximate water-level changes in wells in the Chicot and Evangeline aquifers, 1977-81 and 1980-81, and measured compaction, 1973-81, in the Houston-Galveston region, Texas
R.K. Gabrysch, C.E. Ranzau
1981, Open-File Report 81-341
This report consists of: (1) Four maps that present data on water-level changes during 1977-81 and 1980-81 in the Chicot and Evangeline aquifers and (2) one set of graphs that present data on the compaction of subsurface materials for 1973-81. During these periods, ground-water pumping decreased in Galveston County and...
Hydrologic data of the Lake Cochituate drainage basin, Framingham-Natick, Massachusetts
Frederick B. Gay
1981, Open-File Report 82-342
Lake Cochituate is about 16 miles due west of Boston, Massachusetts, in the southeastern part of Middlesex County. The drainage basin is 17.7 mi2 at the outlet of Lake Cochituate in Framingham. Principal tributaries to the lake are Beaverdam, Course, Pegan, and Snake Brooks. Beaverdam and Course Brooks flow into...
Hydrologic data of the Shawsheen River basin, Massachusetts
Frederick B. Gay, David F. Delaney
1981, Open-File Report 81-802
The Shawsheen River basin drains a 77-square-mile area northwest of metropolitan Boston in eastern Massachusetts and discharges into the Merrimack River. Principal tributaries to the Shawsheen River are: Content, Elm, Heath, Hussey, Kiln, Rogers, Spring, Strong Water, Vine, and Webb Brooks....
Low-flow characteristics of streams in the central Wisconsin River basin, Wisconsin
W.A. Gebert
1981, Open-File Report 81-495
This report describes low-flow characteristics of streams in the central Wisconsin River basin where streamflow data have been collected and presents equations for estimating low-flow characteristics at ungaged sites. Included are estimates of low-flow frequency at 34 gaging stations, flow duration at 24 gaging stations, and low-flow frequency characteristics at...