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Ground-water data for Georgia, 1981
S.E. Matthews, Willis G. Hester, K.W. McFadden
1982, Open-File Report 82-904
More than 2,000 water-level measurements made in Georgia in 1981 provide the basic data for this report. Daily mean water-level fluctuations and trends are shown in hydrographs for the previous year (1980) and fluctuations of the monthly mean water levels are shown for selected years in some observation wells in...
Production and decomposition of forest litter fall on the Apalachicola River flood plain, Florida: Chapter B, Apalachicola River quality assessment
John F. Elder, Duncan J. Cairns
1982, Water Supply Paper 2196-B
Measurements of litter fall (leaves and other particulate organic material) and leaf decomposition were made on the bottom-land hardwood swamp of the Apalachicola River flood plain in 1979-80. Litter fall was collected monthly from nets located in 16 study plots. The plots represented five forest types in the swamp and...
Aeromagnetic measurements in the Cascade Range and Modoc Plateau of northern California; report on work done from June 1, 1980, to November 30, 1980
Richard Couch, Michael Gemperle
1982, Open-File Report 82-932
Aeromagnetic measurements made along flightlines oriented east- west and spaced at 1.6-km intervals and along lines oriented north- south and spaced at 8-km intervals, over approximately 30,000 square km of northern California, exhibit crossing errors of less than 5 nanoTeslas. The measurements show short-wavelength magnetic anomalies associated with near-surface volcanics over and...
Habitat suitability index models: Creek chub
Thomas E. McMahon
1982, FWS/OBS 82/10.4
The creek chub is a widely-distributed cyprinid ranging from the Rocky Mountains to the Atlantic Coast and from the Gulf of Mexico to southern Manitoba and Quebec (Scott and Crossman 1973). Within its range, it is one of the most characteristic and common fishes of small, clear streams (Trautman 1957)....
Use of flumes in metering discharge at gaging stations
F. A. Kilpatrick, V.R. Schneider
1982, Open-File Report 82-871
Flumes for metering discharge are usually of two general types--critical-flow flumes and supercritical-flow flumes. In this report the principles underlying the design of each are discussed, the most commonly used flumes of each of the two types are described, and discharge ratings for each are presented. Considerations in choosing and...
A generic guide to the larvae of the Nearctic Tanytarsini, (Chironomidae:diptera)
J.W. Steiner, J.S. Doughman, C.R. Moore
1982, Open-File Report 82-768
Larvae of the tribe Tanytarsini occur in nearly every aquatic habitat in North America where they act as primary consumers in the food chain. This new taxonomic guide overcomes some deficiencies in existing keys to this tribe and the reviewed and updated taxonomy enables identification of the larvae that may...
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: October 1982
John B. Townshend, J.E. Papp, E.A. Sauter, L.Y. Torrence, T.K. Cunningham
1982, Open-File Report 82-300-J
The preliminary geomagnetic data included here is made available to scientific personnel and organizations, as part of a cooperative effort and on a data exchange basis because of the early need by some users. To avoid delay, all of the data is copied from original forms processed at the observatory;...
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: November 1982
John B. Townshend, J.E. Papp, E.A. Sauter, L.Y. Torrence, T.K. Cunningham
1982, Open-File Report 82-300-K
The preliminary geomagnetic data included here is made available to scientific personnel and organizations, as part of a cooperative effort and on a data exchange basis because of the early need by some users. To avoid delay, all of the data is copied from original forms processed at the observatory;...
An annotated key to the identification of commonly occurring and dominant genera of algae observed in the phytoplankton of the United States
Phillip E. Greeson
1982, Water Supply Paper 2079
In early 1979, a retrieval was made for all phytoplankton data contained in the computerized data file of the U. S. Geological Survey. The retrieval revealed the analytical results of 17,959 samples collected and processed between October 1973 and October 1978. Of the approximately 500 genera of freshwater algae reported...
Water-level maps of the alluvial aquifer, northwestern Mississippi, September 1981
Daphne Darden
1982, Open-File Report 82-574
The study area, locally known as "the Delta", covers the Mississippi River Alluvial Plain in northwestern Mississippi. The Delta is a nearly flat southward sloping surface characterized by oxbow lakes, abandoned stram channels, natural levees, backswamp areas, and bayous.The accompanying maps were prepared to show the effects of ground-water withdrawal...