Surface-Water, Water-Quality, and Ground-Water Assessment of the Municipio of Mayaguez, Puerto Rico, 1999-2002
Jesús Rodríguez-Martínez, Luis Santiago-Rivera, Senen Guzman-Rios, Fernando Gómez-Gómez, Mario L. Oliveras-Feliciano
2004, Water-Resources Investigations Report 2003-4317
The surface-water assessment portion of this study focused on analysis of low-flow characteristics in local streams and rivers, because the supply of safe drinking water was a critical issue during recent dry periods. Low-flow characteristics were evaluated at one continuous-record gaging station based on graphical curve-fitting techniques and log-Pearson Type...
Urban growth in American cities : glimpses of U.S. urbanization
Roger Auch, Janis Taylor, William Acevedo
2004, Circular 1252
The Earth's surface is changing rapidly. Changes are local, regional, national, and even global in scope. Some changes have natural causes, such as earthquakes or drought. Other changes, such as urban expansion, agricultural intensification, resource extraction, and water resources development, are examples of human-induced change that have significant impact upon...
Conjunctive-use optimization model and sustainable-yield estimation for the Sparta aquifer of southeastern Arkansas and north-central Louisiana
Paul W. McKee, Brian R. Clark, John B. Czarnecki
2004, Water-Resources Investigations Report 2003-4231
Conjunctive-use optimization modeling was done to assist water managers and planners by estimating the maximum amount of ground water that hypothetically could be withdrawn from wells within the Sparta aquifer indefinitely without violating hydraulic-head or stream-discharge constraints. The Sparta aquifer is largely a confined aquifer of regional importance that comprises...
Shifting shoals and shattered rocks: How man has transformed the floor of west-central San Francisco Bay
John L. Chin, Florence L. Wong, Paul R. Carlson
2004, Circular 1259
San Francisco Bay, one of the world's finest natural harbors and a major center for maritime trade, is referred to as the 'Gateway to the Pacific Rim.' The bay is an urbanized estuary that is considered by many to be the major estuary in the United States most modified by...
Simulated effects of ground-water augmentation on the hydrology of Round and Halfmoon Lakes in northwestern Hillsborough County, Florida
Richard M. Yager, P. A. Metz
2004, Water-Resources Investigations Report 2003-4322
Pumpage from the Upper Floridan aquifer in northwest Hillsborough County near Tampa, Florida, has induced downward leakage from the overlying surficial aquifer and lowered the water table in many areas. Leakage is highest where the confining layer separating the aquifers is breached, which is common beneath many of the lakes...
Estimates of median flows for streams on the 1999 Kansas Surface Water Register
Charles A. Perry, David M. Wolock, Joshua C. Artman
2004, Scientific Investigations Report 2004-5032
The Kansas State Legislature, by enacting Kansas Statute KSA 82a?2001 et. seq., mandated the criteria for determining which Kansas stream segments would be subject to classification by the State. One criterion for the selection as a classified stream segment is based on the statistic of median flow being equal to...
Estimates of flow duration, mean flow, and peak-discharge frequency values for Kansas stream locations
Charles A. Perry, David M. Wolock, Joshua C. Artman
2004, Scientific Investigations Report 2004-5033
Streamflow statistics of flow duration and peak-discharge frequency were estimated for 4,771 individual locations on streams listed on the 1999 Kansas Surface Water Register. These statistics included the flow-duration values of 90, 75, 50, 25, and 10 percent, as well as the mean flow value. Peak-discharge frequency values were estimated...
Guidelines for Evaluating Ground-Water Flow Models
Thomas E. Reilly, Arlen W. Harbaugh
2004, Scientific Investigations Report 2004-5038
Ground-water flow modeling is an important tool frequently used in studies of ground-water systems. Reviewers and users of these studies have a need to evaluate the accuracy or reasonableness of the ground-water flow model. This report provides some guidelines and discussion on how to evaluate complex ground-water flow models used...
Development of a 2001 National Land Cover Database for the United States
Collin G. Homer, Chengquan Huang, Limin Yang, Bruce K. Wylie, Michael Coan
2004, Photogrammetric Engineering and Remote Sensing (70) 829-840
Multi-Resolution Land Characterization 2001 (MRLC 2001) is a second-generation Federal consortium designed to create an updated pool of nation-wide Landsat 5 and 7 imagery and derive a second-generation National Land Cover Database (NLCD 2001). The objectives of this multi-layer, multi-source database are two fold: first, to provide consistent land cover...
Assessment of smolt condition: Biological and environmental interactions -- The impact of prey and predators on juvenile salmonids
Sally T. Sauter, Robin M. Schrock, James H. Petersen, Alec G. Maule
2004, Report
The Bonneville Power Administration (BPA) has funded the Assessment of Smolt Condition project since 1987. During that time the project changed frequently to meet the information needs of fish managers by conducting studies throughout the Columbia River basin. Past research has examined the influence of smolt physiological development and health...
Urbanization impacts on the structure and function of forested wetlands
Stephen Faulkner
2004, Urban Ecosystems (7) 89-106
The exponential increase in population has fueled a significant demographic shift: 60% of the Earth's population will live in urban areas by 2030. While this population growth is significant in its magnitude, the ecological footprint of natural resource consumption and use required to sustain urban populations is even greater. The...
Geophysical data reveal the crustal structure of the Alaska range orogen within the aftershock zone of the Mw 7.9 Denali fault earthquake
M. A. Fisher, N. Ratchkovski, Warren Nokleberg, Louise Pellerin, Jonathan M.G. Glen
2004, Bulletin of the Seismological Society of America (94) S107-S131
Geophysical information, including deep-crustal seismic reflection, magnetotelluric (mt), gravity, and magnetic data, cross the aftershock zone of the 3 November 2002 Mw 7.9 Denali fault earthquake. These data and aftershock seismicity, jointly interpreted, reveal the crustal structure of the right-lateral-slip Denali fault and the eastern Alaska Range orogen, as well as...
A national fish-tissue mercury model--Implications for monitoring program design
Stephen P. Wente
2004, Conference Paper
No abstract available....
Evaluation of and insights from ALFISH: a spatially explicit landscape-level simulation of fish populations in the Everglades
Holly Gaff, John Chick, Joel Trexler, Donald L. DeAngelis, Louis Gross, Rene Salinas
2004, Hydrobiologia (520) 73-86
We present an evaluation of a spatially explicit, age-structured model created to assess fish density dynamics in the Florida Everglades area. This model, ALFISH, has been used to compare alternative management scenarios for the Florida Everglades region. This area is characterized by periodic dry downs and refloodings. ALFISH uses spatially...
Water quality in the Cook Inlet Basin Alaska, 1998-2001
Roy L. Glass, Timothy P. Brabets, Steven A. Frenzel, Matthew S. Whitman, Robert T. Ourso
2004, Circular 1240
This report contains the major findings of a 1998?2001 assessment of water quality in the Cook Inlet Basin. It is one of a series of reports by the National Water-Quality Assessment (NAWQA) Program that present major findings in 51 major river basins and aquifer systems across the Nation. In these...
Water quality in the Mobile River Basin, Alabama, Georgia, Mississippi, and Tennessee, 1999-2001
J. Brian Atkins, Humbert Zappia, James L. Robinson, Ann K. McPherson, Richard S. Moreland, Douglas A. Harned, Brett F. Johnston, John S. Harvill
2004, Circular 1231
This report contains the major findings of a 1999?2001 assessment of water quality in the Mobile River Basin. It is one of a series of reports by the National Water-Quality Assessment (NAWQA) Program that present major findings in 51 major river basins and aquifer systems across the Nation. In these...
Water quality in the lower Tennessee River Basin, Tennessee, Alabama, Kentucky, Mississippi, and Georgia, 1999-2001
Michael D. Woodside, Anne B. Hoos, James A. Kingsbury, Jeffrey R. Powell, Rodney R. Knight, Jerry W. Garrett, Reavis L. Mitchell III, John A. Robinson
2004, Circular 1233
This report contains the major findings of a 1999?2001 assessment of water quality in the Lower Tennessee River Basin. It is one of a series of reports by the National Water-Quality Assessment (NAWQA) Program that present major findings in 51 major river basins and aquifer systems across the Nation. In...
Water Quality in the Delaware River Basin, Pennsylvania, New Jersey, New York, and Delaware, 1998-2001
Jeffrey M. Fischer, Karen Riva-Murray, R. Edward Hickman, Douglas C. Chichester, Robin A. Brightbill, Kristin M. Romanok, Michael D. Bilger
2004, Circular 1227
This report contains the major findings of a 1998-2001 assessment of water quality in the Delaware River Basin. It is one of a series of reports by the National Water-Quality Assessment (NAWQA) Program that present major findings in 51 major river basins and aquifer systems across the Nation.In these reports,...
Glossary of glacier terminology: a glossary providing the vocabulary necessary to understand the modern glacier environment
Bruce F. Molnia
2004, Open-File Report 2004-1216
No abstract available....
Water Quality in the Delmarva Peninsula, Delaware, Maryland, and Virginia, 1999-2001
Judith M. Denver, Scott W. Ator, Linda M. Debrewer, Matthew J. Ferrari, Jeffrey R. Barbaro, Tracy C. Hancock, Michael J. Brayton, Mark R. Nardi
2004, Circular 1228
This report contains the major findings of a 1999-2001 assessment of water quality in the Delmarva Peninsula. It is one of a series of reports by the National Water-Quality Assessment (NAWQA) Program that present major findings in 51 major river basins and aquifer systems across the Nation. In these reports,...
Results of a Two-Dimensional Hydrodynamic and Sediment-Transport Model to Predict the Effects of the Phased Construction and Operation of the Olmsted Locks and Dam on the Ohio River near Olmsted, Illinois
Chad R. Wagner
2004, Water-Resources Investigations Report 2003-4336
The Olmsted two-dimensional hydrodynamic and sediment-transport model was developed in cooperation with the U.S. Army Corps of Engineers, Louisville District. The model was used to estimate the effects that the phased-construction sequence and operation of the Olmsted Locks and Dam had on sediment-transport patterns in the 11.9-mile study reach (Ohio...
Water quality in the upper Illinois River basin: Illinois, Indiana, and Wisconsin, 1999-2001
George E. Groschen, Terri Arnold, Mitchell A. Harris, David H. Dupre, Faith A. Fitzpatrick, Barbara C. Scudder, William S. Morrow, Paul J. Terrio, Kelly L. Warner, Elizabeth A. Murphy
2004, Circular 1230
This report contains the major findings of a 1999?2001 assessment of water quality in the upper Illinois River Basin. It is one of a series of reports by the National Water-Quality Assessment (NAWQA) Program that present major findings in 51 major river basins and aquifer systems across the Nation. In...
Water quality in the Great and Little Miami River Basins, Ohio and Indiana, 1999-2001
Gary L. Rowe, David C. Reutter, Donna L. Runkle, Julie A. Hambrook, Stephanie D. Janosy, Lee H. Hwang
2004, Circular 1229
This report contains the major findings of a 1999?2001 assessment of water quality in the Great and Little Miami River Basins. It is one of a series of reports by the National Water-Quality Assessment (NAWQA) Program that present major findings in 51 major river basins and aquifer systems across the...
Stratiform barite deposits in the Roberts Mountains allochthon, Nevada: A review of potential analogs in modern sea-floor environments
Randolph A. Koski, James R. Hein
2004, Bulletin 2209-H
The United States is a net importer of barite, a critical mineral for the oil and gas industry; more than 80 percent of current domestic consumption of barite is imported from China. Nearly all of the domestic production of barite comes from stratiform deposits in Nevada. The 'modern analogs' approach...
Water Quality in the Santa Ana Basin, California, 1999-2001
Kenneth Belitz, Scott N. Hamlin, Carmen A. Burton, Robert Kent, Ronald G. Fay, Tyler D. Johnson
2004, Circular 1238
This report contains the major findings of a 1999-2001 assessment of water quality in the Santa Ana River Basin. It is one of a series of reports by the National Water-Quality Assessment (NAWQA) Program that present major findings in 51 major river basins and aquifer systems across the Nation. In...
