A conceptual framework for assessing cumulative impacts on the hydrology of nontidal wetlands
Thomas C. Winter
1988, Environmental Management (12) 605-620
Wetlands occur in geologic and hydrologic settings that enhance the accumulation or retention of water. Regional slope, local relief, and permeability of the land surface are major controls on the formation of wetlands by surface-water sources. However, these landscape features also have significant control over groundwater flow systems, which commonly...
Photolysis of rhodamine-WT dye
D. Y. Tai, R. E. Rathbun
1988, Chemosphere (17) 559-573
Photolysis of rhodamine-WT dye under natural sunlight conditions was determined by measuring the loss of fluorescence as a function of time. Rate coefficients at 30° north latitude ranged from 4.77 × 10−2 day−1 for summer to 3.16 × 10−2 day−2 for winter. Experimental coefficients were in good agreement with values calculated using a laboratory-determined...
Bacterial ethane formation from reduced, ethylated sulfur compounds in anoxic sediments
R.S. Oremland, Michael J. Whiticar, F.E. Strohmaier, R.P. Kiene
1988, Geochimica et Cosmochimica Acta (52) 1895-1904
Trace levels of ethane were produced biologically in anoxic sediment slurries from five chemically different aquatic environments. Gases from these locations displayed biogenic characteristics, having 12C-enriched values of δ13CH4 (−62 to −86%.), δ13C2H6 (−35 to −55%.) and high ratios (720 to 140,000) of CH4[C2H6+ C3H8]">CH4[C2H6+ C3H8]. Endogenous...
Compilation of hydrologic data for the Edwards Aquifer, San Antonio area, Texas, 1987, with 1934-87 summary
G.M. Nalley, P.L. Rettman
1988, Edwards Underground Water District Bulletin 47
No abstract available....
Compilation of hydrologic data for the Edwards aquifer, San Antonio area, Texas, 1986, with 1934-86 summary
G. B. Ozuna, G.M. Nalley, W.G. Stein
1988, Edwards Underground Water District Bulletin 46
No abstract available....
Hydrologic Unit Map – 1988, states of Massachusetts, Rhode Island and Connecticut
Water Resources Division, U.S. Geological Survey
1988, Hydrologic Unit 21
No abstract available....
Maps for America: cartographic products of the U.S. Geological Survey and others
Morris M. Thompson
1988, Report
"Maps for America" was originally published in 1979 as a Centennial Volume commemorating the Geological Survey's hundred years of service (1879 - 1979) in the earth sciences. It was an eminently fitting Centennial Year publication, for, since its establishment, the Geological Survey has continuously carried on an extensive program of...
Climate and ephemeral-stream processes: Twentieth-century geomorphology and alluvial stratigraphy of the Little Colorado River, Arizona
Richard Hereford
1988, GSA Bulletin (95) 654-668
During the first 40 years of the twentieth century, erosion was the dominant geomorphic process affecting the morphology of the Little Colorado River channel. The discharge regimen was one of frequent large floods and high annual discharge that created a wide sandy channel free of vegetation. In the 1940s and...
Bibliography of U.S. Geological Survey water-resources reports for Utah
1987, Utah Division of Water Rights Information Bulletin 28
This bibliography contains a complete listing to December 31, 1986, of reports relating to the water resources of Utah prepared by personnel of the U.S. Geological Survey. Discussions of the related subjects of geology, hydrology, and chemical quality of the water are included in many of the reports. The reports...
A detailed chronology of the most recent eruption period at Mount Hood, Oregon
Kenneth A. Cameron, P. T. Pringle
1987, Geological Society of America Bulletin (99) 845-851
The most recent eruptive period of Mount Hood volcano, the Old Maid eruptive period, was characterized by volcano-hydrologic events (hydrologic events initiated by volcanic activity) which resulted in extensive lahar inundation in the White, Sandy, and Zigzag River drainages and produced a lithic pyroclastic flow which traveled at least 9...
State hydrologic unit maps
Water Resources Division, U.S. Geological Survey
1987, Report
A series of uniform, nationally consistent State Hydrologic Unit Maps that accurately delineate the hydrographic boundaries of major U.S. river basins has been prepared by the U.S. Geological Survey in cooperation with the U.S. Water Resources Council. These maps provide a standardized base for use by Federal and State water...
Use of historical information in a maximum-likelihood framework
T.A. Cohn, J.R. Stedinger
1987, Journal of Hydrology (96) 215-223
This paper discusses flood-quantile estimators which can employ historical and paleoflood information, both when the magnitudes of historical flood peaks are known, and when only threshold-exceedance information is available. Maximum likelihood, quasi-maximum likelihood and curve fitting methods for simultaneous estimation of 1, 2 and 3 unknown parameters are examined. The...
Origins of seawater intrusion in a coastal aquifer - A case study of the Pajaro Valley, California
L.D. Bond, J.D. Bredehoeft
1987, Journal of Hydrology (92) 363-388
Seawater may enter and contaminate stratified coastal aquifers through a number of different pathways. These pathways and their relative contribution are examined in the Pajaro Valley, California, a coastal area with extensive groundwater development. This study considers three pathways of possible intrusion of the primary confined aquifer: (1) onshore leakage...
Probability plotting position formulas for flood records with historical information
R.M. Hirsch
1987, Journal of Hydrology (96) 185-199
For purposes of evaluating fitted flood frequency distributions or for purposes of estimating distributions directly from plots of flood peaks versus exceedance probabilities (either by subjective or objective techniques), one needs a probability plotting position formula which can be applied to all of the flood data available: both systematic and...
Quantifying peak discharges for historical floods
J.L. Cook
1987, Journal of Hydrology (96) 29-40
It is usually advantageous to use information regarding historical floods, if available, to define the flood-frequency relation for a stream. Peak stages can sometimes be determined for outstanding floods that occurred many years ago before systematic gaging of streams began. In the United States, this information is usually not available...
Analysis of saltwater upconing beneath a pumping well
T. E. Reilly, A.S. Goodman
1987, Journal of Hydrology (89) 169-204
Aquifer systems that contain freshwater and saltwater are usually stratified, with the more dense saltwater underlying the freshwater. A groundwater well discharging from the freshwater zone causes the saltwater to move upwards towards the well. This phenomenon is known as saltwater upconing. Two methods of analysis, the sharp-interface method and...
Errors in slope-area computations of peak discharges in mountain streams
R.D. Jarrett
1987, Journal of Hydrology (96) 53-67
During an evaluation of 70 slope-area measurements on higher-gradient streams (stream slopes greater than 0.002) throughout the United States, peak discharge measurements were found to be affected by n values, scour, expansion and contraction losses, viscosity, unsteady flow, number of cross sections, state of flow and stream slope. Problems due to measurement...
The local effects of groundwater pumpage within a fault-influenced groundwater basin, Ash Meadows, Nye County, Nevada, U.S.A.
S. Rojstaczer
1987, Journal of Hydrology (91) 319-337
Large-scale groundwater pumpage and water-level decline data are used in a preliminary attempt to identify the hydraulic connection between several wells and Devils Hole, a small pond in Nye County, Nevada, U.S.A. Results indicate that despite the discontinuous nature of the local aquifers, many wells have good hydraulic connection with...
A comparison of the largest rainfall-runoff floods in the United States with those of the People's Republic of China and the world
J. E. Costa
1987, Journal of Hydrology (96) 101-115
The maximum historic rainfall-runoff floods measured in the United States, the People's Republic of China and the world all plot close to a smooth curve of drainage area versus discharge. In the United States, the possibility that flood peaks were overestimated and the closeness of these peaks to the probable...
Regional regression of flood characteristics employing historical information
Gary D. Tasker, J.R. Stedinger
1987, Journal of Hydrology (96) 255-264
Streamflow gauging networks provide hydrologic information for use in estimating the parameters of regional regression models. The regional regression models can be used to estimate flood statistics, such as the 100 yr peak, at ungauged sites as functions of drainage basin characteristics. A recent innovation in regional regression is the...
Linear error analysis of slope-area discharge determinations
W.H. Kirby
1987, Journal of Hydrology (96) 125-138
The slope-area method can be used to calculate peak flood discharges when current-meter measurements are not possible. This calculation depends on several quantities, such as water-surface fall, that are subject to large measurement errors. Other critical quantities, such as Manning's n, are not even amenable to direct measurement but can only...
Microclimate and actual evapotranspiration in a humid coastal-plain environment
K.F. Dennehy, P.B. McMahon
1987, Journal of Hydrology (93) 295-312
Continuous hourly measurements of twelve meteorologic variables recorded during 1983 and 1984 were used to examine the microclimate and actual evapotranspiration at a low-level radioactive-waste burial site near Barnwell, South Carolina. The study area is in the Atlantic Coastal Plain of southwestern South Carolina. Monthly, daily, and hourly trends in...
Hydraulics and basin morphometry of the largest flash floods in the conterminous United States
J. E. Costa
1987, Journal of Hydrology (93) 313-338
The maximum rainfall-runoff floods measured by indirect methods in small basins (0.39-370 km2) in the conterminous United States are examined. This analysis identified twelve floods that were the largest ever measured. These floods all occurred in semiarid to arid areas. For eleven of the twelve largest rainfall-runoff floods measured in...
Analysis of an anisotropic coastal aquifer system using variable-density flow and solute transport simulation
W. R. Souza, C.I. Voss
1987, Journal of Hydrology (92) 17-41
The groundwater system in southern Oahu, Hawaii consists of a thick, areally extensive freshwater lens overlying a zone of transition to a thick saltwater body. This system is analyzed in cross section with a variable-density groundwater flow and solute transport model on a regional scale. The simulation is difficult, because...
AQMAN; linear and quadratic programming matrix generator using two-dimensional ground-water flow simulation for aquifer management modeling
L.J. Lefkoff, S.M. Gorelick
1987, Water-Resources Investigations Report 87-4061
A FORTRAN-77 computer program code that helps solve a variety of aquifer management problems involving the control of groundwater hydraulics. It is intended for use with any standard mathematical programming package that uses Mathematical Programming System input format. The computer program creates the input files to be used by the...
