Conference Papers

Science Quality and Integrity

The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.

Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.

Filter Total Items: 5326

Topics

Node Release Date

Fulltext search

Advanced filters

Location(s)

January 1, 1985

U. S. G. S. MODULAR GROUND-WATER FLOW MODEL: DESIGNED TO BE UNDERSTOOD AND ADAPTED.

The paper discusses a carefully designed model program and its complementary complete description of all of the physical and mathematical concepts used in the model. The model program consists of a series of independent subroutines called modules. Modules are grouped by hydrologic function into 'packages. ' A report describing the model was written in three levels. At one level the hydrologic conc

Authors

Michael G. McDonald, Arlen W. Harbaugh

January 1, 1985

URBAN STORMWATER INVESTIGATIONS BY THE U. S. GEOLOGICAL SURVEY.

Urban stormwater hydrology studies in the U. S. Geological Survey are currently focused on compilation of national data bases containing flood-peak and short time-interval rainfall, discharge and water-quality information for urban watersheds. Current data bases, updated annually, are nationwide in scope. Supplementing the national data files are published reports of interpretative analyses, a map

Authors

Marshall E. Jennings

January 1, 1985

VOLATILIZATION OF ALKYLBENZENES FROM WATER.

Volatilization is a physical process of importance in determining the fate of many organic compounds in streams and rivers. This process is frequently described by the conceptual-two-film model. The model assumes uniformly mixed water and air phases separated by thin films of water and air in which mass transfer is by molecular diffusion. Mass-transfer coefficients for the water and air films are

Authors

R. E. Rathbun, D. Y. Tai

January 1, 1985

WATER CHEMISTRY AND MINERALOGY OF MORGAN AND GROWLER HOT SPRINGS, LASSEN KGRA, CALIFORNIA.

Because these springs contain substantial amounts of dissolved chloride, halite and sylvite are found above the water level as evaporitic deposits, along with gypsum. One spring is depositing pyrite that contains significant amounts of arsenic, antimony, and thallium. A yellow compound, composed of arsenic and sulfur, is being deposited in another spring. Arsenic and antimony concentrations are hi

Authors

J. Michael Thompson, Terry E.C. Keith, Jerry J. Consul

January 1, 1985

WATER INFORMATION AVAILABLE FROM THE U. S. GEOLOGICAL SURVEY.

As a part of the Geological Survey's program of releasing water data to the public, two large-scale computerized systems are maintained. The National Water Data Storage and Retrieval System was developed to provide more effective and efficient management of data-releasing activities and provides for the processing, storage, and retrieval of surface-water, ground-water and water-quality data. Anoth

Authors

Charles R. Showen

January 1, 1985

YELLOWSTONE MAGMATIC-HYDROTHERMAL SYSTEM, U. S. A.

At Yellowstone National Park, the deep permeability and fluid circulation are probably controlled and maintained by repeated brittle fracture of rocks in response to local and regional stress. Focal depths of earthquakes beneath the Yellowstone caldera suggest that the transition from brittle fracture to quasi-plastic flow takes place at about 3 to 4 km. The maximum temperature likely to be attain

Authors

R.O. Fournier, A. M. Pitt

December 31, 1984