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Page 4833, results 120801 - 120825

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Potentiometric surface of the Floridan Aquifer in the St. Johns River Water Management District and vicinity, Florida, May 1982
George R. Schiner, Eugene C. Hayes
1982, Open-File Report 82-915
This map presents the potentiometric surface of the Floridan aquifer in the St. Johns River Water Management District and vicinity for May 1982. The Floridan aquifer is the principal source of potable water in the area. Water-level measurements were made on approximately 1,000 wells and on several springs. The potentiometric...
Habitat suitability index models: Channel catfish
Thomas E. McMahon, James W. Terrell
1982, FWS/OBS 82/10.2
The native range of channel catfish (Ictalurus Runctatus) extends from the southern portions of the Canadian prairie provinces south to the Gulf states, west to the Rocky Mountains, and east to the Appalachian Mountains (Trautman 1957; Miller 1966; Scott and Crossman 1973). They have been widely introduced outside this range...
Potentiometric surface of the Floridan aquifer in the St. Johns River Water Management District and vicinity, Florida, September 1982
George R. Schiner, Eugene C. Hayes
1982, Open-File Report 83-30
This map presents the potentiometric surface of the Floridan aquifer in the St. Johns River Water Management District and vicinity for September 1982. The Floridan aquifer is the principal source of potable water in the area. Water-level measurements were made on approximately 1,000 wells and on several springs. The potentiometric...
Map showing geochemical characteristics of rock samples from the Kalmiopsis Wilderness, southwestern Oregon
Carl A. Carlson, Norman J. Page, David J. Grimes, Reinhard W. Leinz
1982, Miscellaneous Field Studies Map 1240-C
This report summarizes 1,307 semiquantitative chemical analyses of rocks collected to aid int he evaluation of the mineral resources of the Kalmiopsis Wilderness, Oreg. Chemical analyses and sample location maps are presented by Grimes, Leinz, and Speckman (1981). The area is located in the Kilamath Mountains geoporphic province of southwestern...
Design of surface-water data networks for regional information
Marshall E. Moss, E.J. Gilroy, Gary D. Tasker, M.R. Karlinger
1982, Water Supply Paper 2178
This report describes a technique, Network Analysis of Regional Information (NARI), and the existing computer procedures that have been developed for the specification of the regional information-cost relation for several statistical parameters of streamflow. The measure of information used is the true standard error of estimate of a regional logarithmic...
Drainage divides, Massachusetts; Blackstone and Thames River basins
Bruce E. Krejmas, S. William Wandle
1982, Open-File Report 82-631
Drainage boundaries for selected subbasins of the Blackstone and Thames River basins in eastern Hampden, eastern Hampshire, western Norfolk, southern Middlesex, and southern Worcester Counties, Massachusetts, are delineated on 12 topographic quadrangle maps at a scale of 1:24,000. Drainage basins are shown for all U.S. Geological Survey data-collection sites and...
Preliminary evaluation of the ground-water-flow system in the Twin Cities Metropolitan area, Minnesota
John H. Guswa, Donald I. Siegel, Daniel C. Gillies
1982, Water-Resources Investigations Report 82-44
A preliminary quasi-three-dimensional finite-difference ground-water-flow model of the seven-county Twin Cities Metropolitan area was constructed and used to evaluate parameter sensitivity and adequacy of available data. Fourteen geologic units that underlie the study area were grouped into nine hydr,bgeologic units and were incorporated into a five-layer model. The layers in...
Magnitude and frequency of floods in eastern Oregon
D.D. Harris, L.E. Hubbard
1982, Water-Resources Investigations Report 82-4078
A method for estimating the magnitude and frequency of floods is presented for unregulated streams in eastern Oregon. Equations relating flood magnitude to basin characteristics were developed for exceedance probabilities of 0.5 to 0.01 (2- to 100-year recurrence intervals). Separate equations are presented for four regions: Southeast, Northeast, North Central,...
Hydrology of the sand-and-gravel aquifer, southern Okaloosa and Walton Counties, northwest Florida
L. R. Hayes, D. E. Barr
1982, Water-Resources Investigations Report 82-4110
The sand-and-gravel aquifer in southern Okaloosa and Walton Counties, northwest Florida, extends from land surface to depth of 50 to 150 feet. Intervening layers of clay generally separate the aquifer into an unconfined surficial zone, composed principally of fine to medium sand, and a lower confined zone, consisting of variable...