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Page 371, results 9251 - 9275

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Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of nonpurgeable suspended organic carbon by wet-chemical oxidation and infrared spectrometry
Mark R. Burkhardt, James A. Kammer, Virendra K. Jha, Peggy G. O’Mara-Lopez, Mark T. Woodworth
1997, Open-File Report 97-380
Precision and accuracy results are described for the determination of nonpurgeable suspended organic carbon (SOC) by silver-filter filtration, wet-chemical oxidation, and infrared determination of hte resulting carbon dioxide (CO2) used at the U.S. Geological Survey's nationalWater Quality Laboratory. An aliquot of raw water isfiltered through a 0.45-micrometer silver filter....
Digital data sets that describe aquifer characteristics of the Enid isolated terrace aquifer in northwestern Oklahoma
C.J. Becker, D. L. Runkle, Alan Rea
1997, Open-File Report 96-450
ARC/INFO export and nonproprietary format files The data sets in this report include digitized aquifer boundaries and maps of hydraulic conductivity, recharge, and ground-water level elevation contours for the Enid isolated terrace aquifer in northwestern Oklahoma. The Enid isolated terrace aquifer covers approximately 82 square miles and supplies water for irrigation,...
Digital data sets that describe aquifer characteristics of the High Plains aquifer in western Oklahoma
C.J. Becker, D. L. Runkle, Alan Rea
1997, Open-File Report 96-451
ARC/INFO export files This diskette contains digitized aquifer boundaries and maps of hydraulic conductivity, recharge, and ground-water level elevation contours for the High Plains aquifer in western Oklahoma. This area encompasses the panhandle counties of Cimarron, Texas, and Beaver, and the western counties of Harper, Ellis, Woodward, Dewey, and Roger Mills....
Impacts of volcanic gases on climate, the environment, and people
Kenneth A. McGee, Michael P. Doukas, Richard Kessler, Terrence M. Gerlach
1997, Open-File Report 97-262
Gases from volcanoes give rise to numerous impacts on climate, the environment, and people. U.S. Geological Survey (USGS) scientists are inventorying gas emissions at many of the almost 70 active volcanoes in the United States. This effort helps build a better understanding of the dynamic processes at work on the...
Digital data sets that describe aquifer characteristics of the Tillman terrace and alluvial aquifer in southwestern Oklahoma
C.J. Becker, D. L. Runkle, Alan Rea
1997, Open-File Report 96-452
ARC/INFO export and nonproprietary format files This diskette contains digitized aquifer boundaries and maps of hydraulic conductivity, recharge, and ground-water level elevation contours for the Tillman terrace and alluvial aquifer in southwestern Oklahoma. The Tillman terrace aquifer encompasses the unconsolidated terrace deposits and alluvium associated with the North Fork of the...
Digital data sets that describe aquifer characteristics of the Vamoosa-Ada aquifer in east-central Oklahoma
Marvin M. Abbott, D. L. Runkle, Alan Rea
1997, Open-File Report 96-444
Nonproprietary format files This diskette contains digitized aquifer boundaries and maps of hydraulic conductivity, recharge, and ground-water level elevation contours for the Vamoosa-Ada aquifer in east-central Oklahoma. The Vamoosa-Ada aquifer is an important source of water that underlies about 2,320-square miles of parts of Osage, Pawnee, Payne, Creek, Lincoln, Okfuskee, and...
Modified level II streambed-scour analysis for structure I-70-69-5185 crossing East Fork White Lick Creek in Hendricks County, Indiana
B.A. Robinson, D. C. Voelker, R. L. Miller
1997, Open-File Report 97-309
Level II scour evaluations follow a process in which hydrologic, hydraulic, and sediment transport data are evaluated to calculate the depth of scour that may result when a given discharge is routed through a bridge opening. The results of the modified Level II analysis for structure 1-70-69-5185 on Interstate 70...
Digital data sets that describe aquifer characteristics of the Central Oklahoma Aquifer in central Oklahoma
D. L. Runkle, S. C. Christenson, Alan Rea
1997, Open-File Report 96-454
ARC/INFO export files The data sets in this report include digitized aquifer boundaries and maps of hydraulic conductivity, recharge, and ground-water level elevation contours for the Central Oklahoma aquifer in central Oklahoma. This area encompasses all or part of Cleveland, Lincoln, Logan, Oklahoma, Payne, and Pottawatomie Counties. The Central Oklahoma aquifer...
Digital data sets that describe aquifer characteristics of the Rush Springs Aquifer in western Oklahoma
D. L. Runkle, M.F. Becker, Alan Rea
1997, Open-File Report 96-453
This diskette contains digitized aquifer boundaries and maps of hydraulic conductivity, recharge, and ground-water level elevation contours for the Rush Spring aquifer in western Oklahoma. This area encompasses all or part of Blaine, Caddo, Canadian, Comanche, Custer, Dewey, Grady, Stephens, and Washita Counties. These digital data sets were developed by...
User's guide for MODTOOLS: Computer programs for translating data of MODFLOW and MODPATH into geographic information system files
Leonard L. Orzol
1997, Open-File Report 97-240
MODTOOLS is a set of computer programs for translating data of the ground-water model, MODFLOW, and the particle-tracker, MODPATH, into a Geographic Information System (GIS). MODTOOLS translates data into a GIS software called ARC/INFO. MODFLOW is the recognized name for the U.S. Geological Survey Modular Three-Dimensional Finite-Difference Ground-Water Model. MODTOOLS...
Hydrologic data, Colorado River and major tributaries, Glen Canyon Dam to Diamond Creek, Arizona, water years 1990-95
John J. Rote, Marilyn E. Flynn, D. J. Bills
1997, Open-File Report 97-250
The U.S. Geological Survey collected hydrologic data at 12 continuous-record stations along the Colorado River and its major tributaries between Glen Canyon Dam and Diamond Creek. The data were collected from October 1989 through September 1995 as part of the Bureau of Reclamation's Glen Canyon Environmental Studies. The data include...
Streamflow and sediment data collected to determine the effects of a controlled flood in March and April 1996 on the Colorado River between Lees Ferry and Diamond Creek, Arizona
Alice D. Konieczki, Julia B. Graf, Michael C. Carpenter
1997, Open-File Report 97-224
An 8-day period of planned release of water at 1,275 cubic meters per second from Glen Canyon Dam in March and April 1996 provided an opportunity to collect data on river stage, streamflow, water chemistry, and sediment transport at discharges above powerplant releases. The U.S. Geological Survey collected data at...