Groundwater Seepage Vectors and the Potential for Hillslope Failure and Debris Flow Mobilization
Richard M. Iverson, Jon J. Major
1986, Water Resources Research (22) 1543-1548
Insight for understanding the effect of groundwater flow on the potential for hillslope failure and liquefaction is provided by a novel limit‐equilibrium analysis of infinite slopes with steady, uniform Darcian seepage of arbitrary magnitude and direction. Normalization of the limit‐equilibrium solution shows that three dimensionless parameters govern completely the Coulomb...
The cross section
Water Resources Division, U.S. Geological Survey
1986, Report
No abstract available....
Landform modifications at a nuclear-waste burial site
J. R. Gray
1986, Conference Paper, Proceedings, Fourth Federal Interagency Sedimentation Conference: Interagency Advisory Committee on Water Data, Subcommittee on Sedimentation, Las Vegas
No abstract available....
Meeting the challenge of policy-relevant science: lessons from a water resource project
Berton L. Lamb
1986, Journal of the American Water Resources Association (22) 811-815
Water resource scientists face complex tasks in evaluating aspects of water projects, but relatively few assessment procedures have been applied and accepted as standard applications. Decision-makers often rely on environmental assessments to evaluate the value and operation of projects. There is often confusion about scientists' role in policy decisions. The...
Chemical qualities of water that contribute to human health in a positive way
Howard C. Hopps
1986, Science of Total Environment (54) 207-216
The emphasis on harmful substances that may occur in potable waters has almost obscured the fact that important beneficial constituents are commonly present.The chemical substances in water that make positive contributions to human health act mainly in two ways: (i) nutritionally, by supplying essential macro and micro elements that the...
A new formula for the analytical solution of the radial dispersion problem
Paul A. Hsieh
1986, Water Resources Research (22) 1597-1605
A new formula is presented for the analytical solution of the radial dispersion problem, which analyzes the dispersive transport of a tracer in radial flow from a recharge well. This formula is simpler than a solution presented by previous investigators, but the two solutions are shown to be equivalent. Because...
Quantification of instream flow needs of a wild and scenic river for water rights litigation
Herbert S. Garn
1986, Journal of the American Water Resources Association (22) 745-751
The lower 4 miles of the Red River, a tributary of the Rio Grande in northern New Mexico, was designated as one of the “instant” components of the National Wild and Scenic River System in 1968. The Bureau of Land Management (BLM), as the managing agency of the wild and...
Development and evaluation of habitat suitability criteria for use in the instream flow incremental methodology
Ken D. Bovee
1986, Report, Instream Flow Information Paper #21
The Instream Flow Incremental Methodology (IFIM) is a habitat-based tool used to evaluate the environmental consequences of various water and land use practices. As such, knowledge about the conditions that provide favorable habitat for a species, and those that do not, is necessary for successful implementation of the methodology. In...
Introduction to stream network habitat analysis
John M. Bartholow, Terry J. Waddle
1986, Report
Increasing demands on stream resources by a variety of users have resulted in an increased emphasis on studies that evaluate the cumulative effects of basinwide water management programs. Network habitat analysis refers to the evaluation of an entire river basin (or network) by predicting its habitat response to alternative...
Theory, construction and operation of simple tensiometers
David I. Stannard
1986, Groundwater Monitoring and Remediation (6) 70-78
The tensiometer, introduced by Richards and Gardner (1936) has been a tool often ignored in unsaturated zone investigations. Hazardous waste disposal studies that require values of unsaturated zone matric potentials will expand tensiometer use. Familiarity with operation and installation principles is necessary to ensure quality data collection.The essential elements of...
The temperature dependence of isothermal moisture vs. potential characteristics of soils
J. R. Nimmo, E.E. Miller
1986, Soil Science Society of America Journal (50) 1105-1113
A method has been developed for rapid, transient measurement of hysteretic soil-moisture characteristics as a function of temperature. While a varying soil-water pressure was imposed on a thin sample by means of flexible membranes held in firm contact with the soil, water content was measured by gamma-ray attenuation, and matric...
Water-resources activities of the U.S. Geological Survey in the Red River Valley, Minnesota fiscal year 1986
T. A. Winterstein
1986, Report
No abstract available....
Correlations between stream sulphate and regional SO2 emissions
R. A. Smith, R. B. Alexander
1986, Nature (322) 722-724
The relationship between atmospheric SO2 emissions and stream and lake acidification has been difficult to quantify, largely because of the limitations of sulphur deposition measurements. Precipitation sulphate (SO4) records are mostly <5 yr in length1 and do not account for dry sulphur deposition2. Moreover, a variable fraction of wet- and dry-deposited sulphur...
Continuous measurement of suspended-sediment concentration
J. V. Skinner, J.P. Beverage
1986, Conference Paper
No abstract available....
Effects of nozzle orientation on sediment sampling
T. A. Winterstein, H.G. Stefan
1986, Conference Paper
No abstract available....
Use of borehole neutron logs to estimate moisture content in the unsaturated zone of an alluvial aquifer
Vicente Quinones-Aponte, Ramon A. Carrasquillo
Ferdinand Quinones, A.V. Sanchez, H. Smith, editor(s)
1986, Conference Paper, Proceedings of the Third Caribbean Islands Water-Resources Congress
he neutron borehole logging tool was calibrated for the determination of moisture content in theunsaturated zone of an alluvial aquifer. A continuous core sample was collected to a depth of 15 ft from the unsaturated zone.Moisture content and other soil properties were determined by standard soil-laboratory techniques. The neutron logs profile was correlated...
Sampling suspended sediment in ice-covered rivers
J. V. Skinner
1986, Conference Paper
No abstract available....
Role of blanket deposits on the hydrology and water chemistry of the limestone water-table aquifer within the north coast of Puerto Rico through interpretation of geochemical data
Angel Roman-Mas
Ferdinand Quinones, A.V. Sanchez, H. Smith, editor(s)
1986, Conference Paper, Proceedings of the Third Caribbean Islands Water-Resources Congress
Estimating ground-water influx to a portion of the Rio Grande de Manati River basin in Puerto Rico through the measurement of 222Rn
K. Kelly Ellins, Angel Roman-Mas, Roger W. Lee
Ferdinand Quinones, A.V. Sanchez, H. Smith, editor(s)
1986, Conference Paper, Proceedings of the Third Caribbean Islands Water-Resources Congress
Water has become a critical commodity in the Caribbean Region. In spite of a relative abundance of rainfall even on the smaller islands, the region is faced with severe seasonal shortages as well as increasing water quality problems. The supply of thewater needs in the area will become even more critical...
Population trends, reproductive success, and organochlorine chemical contaminants in waterbirds nesting in Galveston Bay, Texas
Kirke A. King, Alexander J. Krynitsky
1986, Archives of Environmental Contamination and Toxicology (15) 367-376
The effects of environmental contaminants on the reproductive success of olivaceous cormorants (Phalacrocorax olivaceus), laughing gulls (Larus atricilla), and black skimmers (Rhynchops niger) nesting in Galveston Bay, Texas were investigated from 1980 through 1982. Populations of cormorants and gulls have remained stable in recent years, but skimmer numbers may have...
Hydrogeochemistry of sulfide and arsenic-rich tailings and alluvium along Whitewood Creek, South Dakota (Part 1 of 3 parts)
F. M. M. Morel, J. Rouse, J. L. Schnoor, M. G. Wolman, J. A. Cherry
1986, Mineral & Energy Resources (29)
During 100 years prior to 1977, Whitewood Creek, SD, received about 1 billion tons of arsenic-rich and sulfide-mineral rich tailings from gold mining operations. A hydrogeochemical investigation conducted in 1983-84 focused on four local study areas on the flood plain where tailings deposits exist on top of moderately permeable alluvium....
Recent developments in hydrologic instrumentation
Vito J. Latkovich, James C. Futrell II
Douglas L. Kane, editor(s)
1986, American Water Resources Association Technical Publication Series 86-1
The programs of the U.S. Geological Survey require instrumentation for collecting and monitoring hydrologic data in cold regions. The availability of space-age materials and implementation of modern electronics and mechanics is making possible the recent developments of hydrologic instrumentation, especially in the area of measuring streamflow under ice cover. Material...
Transient electromagnetic soundings in the Michigan Basin for ground water evaluation
D.V. Fitterman
1986, Conference Paper, Proceedings of the Surface and Borehole Geophysical Methods and Ground Water Instrumentation Conference and Exposition
No abstract available....
Marine cobalt resources
F.T. Manheim
1986, Science (232) 600-608
Ferromanganese oxides in the open oceans are more enriched in cobalt than any other widely distributed sediments or rocks. Concentrations of cobalt exceed 1 percent in ferromanganese crusts on seamounts, ocean ridges, and other raised areas of the ocean. The cobalt-rich crusts may be the slowest growing of any earth...
Unsteady, nonuniform landslide motion: 2. Linearized theory and the kinematics of transient response
Richard M. Iverson
1986, Journal of Geology (94) 349-364
Unsteady, nonuniform landslide motion is caused by temporal and spatial variations in driving and resisting forces. Common sources of these variations include stream undercutting of landslide toes, episodic headscarp slumping, and ground-water potentiometric fluctuations. A linear theory for the kinematics of unsteady,...
