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Page 5238, results 130926 - 130950

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Preliminary appraisal of the geohydrologic aspects of drainage wells, Orlando area, central Florida
Joel O. Kimrey
1978, Water-Resources Investigations Report 78-37
The Floridan aquifer contains two highly transmissive cavernous zones in the Orlando area: an upper producing zone about 150-600 feet below land surface; and a lower producing zone about 1,100-1,500 feet below land surface. Natural head differences are downward and there is hydraulic connection between the two producing zones. Drainage...
Progress report on hydrologic investigations of small drainage areas in New Hampshire: preliminary relations for estimating peak discharges on rural, unregulated streams
Denis R. LeBlanc
1978, Water-Resources Investigations Report 78-47
The magnitude and frequency of floods on rural, unregulated streams in New Hampshire with drainage areas between 0.27 and 622 square miles may be estimated from drainage area, main-channel slope, and a precipitation intensity index. Based on multiple-regression analyses of data from 59 gaged sites in New Hampshire and adjacent...
Evaluation of thermograph data for California streams
J.T. Limerinos
1978, Water-Resources Investigations Report 78-66
Statistical analysis of water-temperature data from California streams indicates that, for most purposes, long-term operation of thermographs (automatic water-temperature recording instruments) does not provide a more useful record than either short-term operation of such instruments or periodic measurements. Harmonic analyses were made of thermograph records 5 to 14 years in...
Quality and movement of ground water in Otter Creek - Dry Creek basin, Cortland County, New York
William Buller, Wallace J. Nichols, J. F. Harsh
1978, Water-Resources Investigations Report 78-3
A steady increase in the chloride and nitrate content of water in a sand and gravel aquifer of glacial origin in the Cortland, N.Y., area prompted a study to obtain data on the extent and source of these constituents. Chloride concentration in the upper part of the aquifer increased generally...
Map showing ground-water conditions in the House Rock area, Coconino County, Arizona-- 1976
G. W. Levings, C. D. Farrar
1978, Water-Resources Investigations Report 78-15
The House Rock area includes about 1,500 sq mi in north-central Arizona. Ground water is present in several aquifers that are made up of one or more formations. In the Paria Plateau and Wahweap areas ground water is obtained from the N aquifer, which includes the Navajo Sandstone, Kayenta Formation,...
Low-flow frequency of Georgia streams
R.F. Carter, S.A. Putnam
1978, Water-Resources Investigations Report 77-127
This report contains analyses of low-flow data and tabulations of computed low-flow frequency for all stream sites in Georgia where suitable flow records have been collected. These include 134 continuous-record gaging stations and 102 partial-record gaging stations. Frequency records for gaging stations with short records have been adjusted where possible...
Digital-model simulation of the glacial-outwash aquifer, Otter Creek-Dry Creek basin, Cortland County, New York
O. J. Cosner, J. F. Harsh
1978, Water-Resources Investigations Report 78-71
The city of Cortland, New York, and surrounding areas obtain water from the highly productive glacial-outwash aquifer underlying the Otter Creek-Dry Creek basin. Pumpage from the aquifer in 1976 was approximately 6.3 million gallons per day and is expected to increase as a result of population growth and urbanization. A...
Flood profiles for Cypress Creek, west-central Florida
W. R. Murphy Jr.
1978, Water-Resources Investigations Report 78-8
Flood profiles are included for selected recurrence-interval floods in west-central Florida for a 27-mile reach of Cypress Creek, for a 4-mile tributary reach, and for a 1.2-mile distributary reach. The procedure for constructing flood profiles is based on flood heights computed in a step-backwater analysis using the following data: 2-,...
Altitude and configuration of the top of the Floridan Aquifer, Duval County, Florida
G.W. Leve
1978, Water-Resources Investigations Report 77-114
Structural contours on the top of the Floridan aquifer in Duval County, Florida, show that the top of the aquifer ranges from less than 300 feet below sea level to more than 600 feet below sea level. Two inferred concealed faults occur in the aquifer; one trending northeast-southwest in the...
Magnitude and frequency of flooding on the Myakka River, Southwest Florida
K.M. Hammett, J.F. Turner Jr., W. R. Murphy Jr.
1978, Water-Resources Investigations Report 78-65
Myakka River is a coastal stream that drains approximately 550 square miles in southwest Florida. Under natural conditions, Tatum Sawgrass, a large depression, served as a flood overflow area for the upper part of the Myakka River basin. A recently constructed (1974) dike system across the lower part of Tatum...
Bedrock topography of north-central Iowa
R.E. Hansen
1978, IMAP 1080
The bedrock in Iowa (Hershey, 1969) is generally overlain by deposits of glacial drift and alluvium, which range in thickness from less than 1 ft to more than 400 ft, and from less than 1 ft to about 60 ft respectively. The configuration of the bedrock surface is the result...
Technique for estimating magnitude and frequency of floods in Virginia
Earley M. Miller
1978, Water-Resources Investigations Report 78-5
A technique is presented for estimating the magnitude and frequency of floods in Virginia. For 299 gaged sites, the magnitudes of floods having recurrence intervals of 2 to 100 years are provided in tables. For ungaged sites, regression relations are presented that allow the estimation of flood magnitudes based on...
Availability and quality of water from shallow aquifers in Duval County, Florida
Lawson V. Causey, G. G. Phelps
1978, Water-Resources Investigations Report 78-92
The shallow-aquifer system in Duval County, Fla., overlies the Florida aquifer and is composed chiefly of sand, clay, sandy clay, and limestone. Thickness of the system ranges from about 300 to 600 feet. The upper 150 feet of deposits, consisting of the water-table and shallow-rock zones, are the most dependable...
Geologic map of the Aeolis Quadrangle of Mars
D. H. Scott, M.N. West
1978, IMAP 1111
Two principal physiographic provinces of Mars are represented in the Aeolis quadrangle: (1) Elysium Planitia in the north is part of a broad planet-encircling belt of relatively young lowland plains, and (2) cratered highlands in the south consist<span...
Geohydrology of the northern Louisiana salt-dome basin pertinent to the storage of radioactive wastes; a progress report
R. L. Hosman
1978, Water-Resources Investigations Report 78-104
Salt domes in northern Louisiana are being considered as possible storage sites for nuclear wastes. The domes are in an area that received regional sedimentation through early Tertiary (Eocene) time with lesser amounts of Quaternary deposits. The Cretaceous-Tertiary accumulation is a few thousand feet thick; the major sands are regional...
Computer model of two-dimensional solute transport and dispersion in ground water
Leonard F. Konikow, J.D. Bredehoeft
1978, Techniques of Water-Resources Investigations 07-C2
This report presents a model that simulates solute transport in flowing ground water. The model is both general and flexible in that it can be applied to a wide range of problem types. It is applicable to one- or two-dimensional problems involving steady-state or transient flow. The model computes changes...