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Modeling coliform-bacteria concentrations and pH in the salt-wedge reach of the Duwamish River Estuary, King County, Washington
W.L. Haushild, Edmund A. Prych
1976, Open-File Report 76-415
Total- and fecal-coliform bacteria, plus pH, alkalinity, and dissolved inorganic carbon are water-quality parameters that have been added to an existing numerical model of water quality in the salt-wedge reach of the Duwamish River estuary in Washington. The coliform bacteria are modeled using a first-order decay (death) rate, which is...
Preliminary investigation of faults and folds along the inner edge of the coastal plain in northeastern Virginia
Robert B. Mixon, Wayne L. Newell
1976, Open-File Report 76-330
Four en-echelon northeast-trending structures, including southeast-dipping monoclines and northwest-dipping high-angle reverse-faults, have been mapped along the inner edge of the Coastal Plain in northeastern Virginia -- an area generally considered to be undeformed. Although displacements are small (15to 60 m), the structures markedly affect the present distribution and thickness of...
Geothermal investigations in Idaho, Part IV, Isotopic and geochemical analyses of water from the Bruneau-Grand View and Weiser areas, Southwest Idaho
Craig T. Rightmire, H.W. Young, R.L. Whitehead
1976, Open-File Report 76-166
Variations of deuterium and oxygen-18 concentrations in thermal ground waters and local nonthermal springs have been used to aid in describing the source of recharge in the Bruneau-Grand View and Weiser areas, southwest Idaho. Isotope and geochemical data for the Bruneau-Grand View area suggest that recharge to the area may...
Heat flow and near-surface radioactivity in the Australian continental crust
J.H. Sass, J.C. Jaeger, Robert J. Munroe
1976, Open-File Report 76-250
Heat-flow data have been obtained at 44 sites in various parts of Australia. These include seven sites from the old (~ 2500 m.y.) Precambrian shield of Western Australia, seventeen from the younger (~ 600- 2000 m.y.) Precambrian rocks of South Australia, the Northern Territory, and Queensland, and twenty within the...
Time-of-travel studies, Susquehanna River, Binghamton, New York, to Clarks Ferry, Pennsylvania
C.D. Kauffman, J.T. Armbruster, Andrew Voytik
1976, Open-File Report 76-247
Results of time-of-travel studies are presented in both tabular and graphical form for several flow conditions in the Susquehanna River from Binghamton, N.Y., to Clarks Ferry, Pa. This reach is approximately 240 miles (386 kilometres) long, measured along the center of the channel, and has a drainage area of about...
Measurement of "turbidity" and related characteristics of natural waters
R.J. Pickering
1976, Open-File Report 76-153
The U.S. Geological Survey, Water Resources Division has adopted the following principles to be used in selecting methods for the measurement of light transmitting characteristics of natural waters: (1) standard instruments and methods are to be adopted to measure and report in optical units, avoiding ' turbidity ' as a...