Geology Reports⌕ Search

SEARCH · Geology Reports

Results for “Biology”

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 775 records · Page 43Linked to original sources
USGS1977

Reconnaissance examination of the biology, chemistry, and physical characteristics of selected streams in California and Nevada

This report contains hydrological data from several California and Nevada streams. Emphasis is placed upon water-quality data, but stream discharge at the time of making the water-quality measurements also is given. The purpose of the report is to provide personnel of the U.S. Bureau of Land Management with baseline hydrological data from the selected streams and one well. The streams, the stream sites selected for sampling, and the parameters measured, were chosen in consultation with U.S. Bureau of Land Management personnel.

California, Nevada↗
USGS1978

Chemical and biological quality of Lakes Faith, Hope, and Charity at Maitland, Florida, with emphasis on the effects of storm runoff and bulk precipitation, 1971-1974

Located in a closed basin, near Orlands, Fla., Lake Faith, Hope, and Charity cover a combined area of 132 acres and are surrounded by residential, citrus grove and undeveloped areas. All of these areas affect the water quality of the lakes through storm runoff and transport of windborne material. During a study from April 1971 to June 1974, stages of Lakes Faith, Hope, and Charity declined 1.5, 1.4, and 3.0 ft, respectively, because the rainfall was 3.78 in. below average for the area. Inflow to the lakes during this 3-year period was approximately 1,966 acre-ft of which 84 percent was by rainfall and 16 percent was by storm runoff. Rainfall and runoff brought in 82 tons of dissolved solids of which storm runoff carried 51 tons and bulk precipitation carried 32 tons. Dissolved solids concentrations in the lakes were relatively low, averaging 91, 132, and 212 mg/liter for Lakes Faith, Hope, and Charity, respecetively. Major ions, trace elements and nutrients were present in the lakes in relatively low concentrations. Phytoplankton and coliform population showed sharp seasonal fluctuations with the maximum population generally occurring during the warmer months. Blue-green algae predominated in all three lakes. (Woodard-USGS)

Open-File Report↗
USGS1981

Quality assurance practices for the chemical and biological analyses of water and fluvial sediments

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 System of the U.S. Geological Survey, and still others describe various statistical techniques and give examples of their use in evaluating and assuring the quality of analytical data. The practices are arranged into eight sections: Analytical Methods Development Procedures Standard Quantitative Analysis Techniques Instrumental Techniques Reference Material Laboratory Quality Control Quality Assurance Monitoring Documentation, Summary, and Evaluation of Data Materials Evaluation Each section is preceded by a brief description of the material covered. Similarly within each section, each practice is preceded by a description of its application or scope.

Open-File Report↗
USGS1992

Streamflow, water-quality, and biological data on streams in an area of longwall coal mining, southern Ohio, water years 1987-89

This report presents data on the first 3 years of a 5-year study of the effects of longwall coal mining on six streams near a mining complex in Meigs, Gallia, and Vinton Counties, Ohio. Longwall coal mining is method of underground mining in which 75 to 90 percent of the coal is removed; conventional methods, such as room-and-pillar mining, remove only about 50 percent of the coal. Use of the longwall method is expected to increase in Ohio. Collapse or subsidence of the overburden and land surface occurs immediately after the removal of the coal. Such collapse can disrupt surface drainage and the recharge of ground water. The data include streamflow, water quality, and the abundance and diversity of aquatic macroinvertebrates and fish. The data were collected from eight sites on six streams from July 1987 through September 1989. The drainage areas of these sites range from 2.04 to 80.8 square miles and include the major drainages of the area being mined. Total precipitation in 1987 and 1988 in the study area was 78 and 81 percent, respectively, of the annual average (from 1939 to 1989) of 39.59 inches. The total precipitation in 1989 was 135 percent of the annual average. Streams at six of the eight sites were dry for parts of the first 2 years. Specific conductance ranged from 180 to 3,500 microsiemens per centimeter at 25 degrees Celsius, pH ranged from 6.9 to 8.0, and the concentration of total recoverable iron ranged from 80 to 1,800 micrograms per liter. Macroinvertebrate and fish populations indicate a warmwater-habitat rating of fair to good according to Ohio Environmental Protection Agency standards. This information will help provide a data base from which the effects of longwall mining on streams in southern Ohio can be evaluated. Correlations of surface-water quality and quantity with longwall mining were not attempted in this study.

Open-File Report↗