Preliminary Isostatic Gravity Map of Joshua Tree National Park and Vicinity, Southern California
V.E. Langenheim, Shawn Biehler, D.K. McPhee, C.A. McCabe, J. T. Watt, M.L. Anderson, B. A. Chuchel, P. Stoffer
2007, Open-File Report 2007-1218
This isostatic residual gravity map is part of an effort to map the three-dimensional distribution of rocks in Joshua Tree National Park, southern California. This map will serve as a basis for modeling the shape of basins beneath the Park and in adjacent valleys and also for determining the location and...
Occurrence of Uranium and 222Radon in Glacial and Bedrock Aquifers in the Northern United States, 1993-2003
Joseph D. Ayotte, Sarah M. Flanagan, William S. Morrow
2007, Scientific Investigations Report 2007-5037
Water-quality data collected from 1,426 wells during 1993-2003 as part of the U.S. Geological Survey National Water-Quality Assessment (NAWQA) program were evaluated to characterize the water quality in glacial and bedrock aquifers of the northern United States. One of the goals of the NAWQA program is to synthesize data from...
Effects of the temporal variability of evapotranspiration on hydrologic simulation in central Florida
Andrew M. O’Reilly
2007, Scientific Investigations Report 2007-5100
The transient response of a hydrologic system can be of concern to water-resource managers, because it is often extreme relatively short-lived events, such as floods or droughts, that profoundly influence the management of the resource. The water available to a hydrologic system for stream flow and aquifer recharge is determined...
Modeling 3-D slope stability of coastal bluffs using 3-D ground-water flow, Southwestern Seattle, Washington
Dianne L. Brien, Mark E. Reid
2007, Scientific Investigations Report 2007-5092
Landslides are a common problem on coastal bluffs throughout the world. Along the coastal bluffs of the Puget Sound in Seattle, Washington, landslides range from small, shallow failures to large, deep-seated landslides. Landslides of all types can pose hazards to human lives and property, but deep-seated landslides are of significant...
The geology of Six Mile Reef, eastern Long Island Sound
L.J. Poppe, J. F. Denny, S.J. Williams, M. S. Moser, N.A. Forfinski, H.F. Stewart, E. F. Doran
2007, Open-File Report 2007-1191
Digital terrain models, which can be produced from multibeam bathymetric data, are ordered arrays of depths for a number of sea-floor positions sampled at regularly spaced intervals. These models provide valuable base maps for marine geological interpretations that help define the variability of the sea floor (one of the primary...
Predicting water quality by relating secchi-disk transparency and chlorophyll a measurements to Landsat satellite imagery for Michigan inland lakes, 2001-2006
L. M. Fuller, R. J. Minnerick
2007, Fact Sheet 2007-3022
The State of Michigan has more than 11,000 inland lakes; approximately 3,500 of these lakes are greater than 25 acres. The USGS, in cooperation with the Michigan Department of Environmental Quality (MDEQ), has been monitoring the quality of inland lakes in Michigan through the Lake Water Quality Assessment monitoring program....
MODFLOW Ground-Water Model - User Guide to the Subsidence and Aquifer-System Compaction Package (SUB-WT) for Water-Table Aquifers
S. A. Leake, D. L. Galloway
2007, Techniques and Methods 6-A23
A new computer program was developed to simulate vertical compaction in models of regional ground-water flow. The program simulates ground-water storage changes and compaction in discontinuous interbeds or in extensive confining units, accounting for stress-dependent changes in storage properties. The new program is a package for MODFLOW, the U.S. Geological...
Marl prairie vegetation response to 20th century hydrologic change
Christopher E. Bernhardt, Debra A. Willard
2007, Open-File Report 2006-1355
We conducted geochronologic and pollen analyses from sediment cores collected in solution holes within marl prairies of Big Cypress National Preserve to reconstruct vegetation patterns of the last few centuries and evaluate the stability and longevity of marl prairies within the greater Everglades ecosystem. Based on radiocarbon dating and pollen...
Watershed Effects on Streamflow Quantity and Quality in Six Watersheds of Gwinnett County, Georgia
Mark N. Landers, Paul D. Ankcorn, Keith W. McFadden
2007, Scientific Investigations Report 2007-5132
Watershed management is critical for the protection and enhancement of streams that provide multiple benefits for Gwinnett County, Georgia, and downstream communities. Successful watershed management requires an understanding of how stream quality is affected by watershed characteristics. The influence of watershed characteristics on stream quality is complex, particularly for the...
Water Budgets: Foundations for Effective Water-Resources and Environmental Management
Richard W. Healy, Thomas C. Winter, James W. LaBaugh, O. Lehn Franke
2007, Circular 1308
INTRODUCTION Water budgets provide a means for evaluating availability and sustainability of a water supply. A water budget simply states that the rate of change in water stored in an area, such as a watershed, is balanced by the rate at which water flows into and out of the area. An...
Ecological Status of Wyoming Streams, 2000-2003
David A. Peterson, Eric G. Hargett, Peter R. Wright, Jeremy R. Zumberge
2007, Scientific Investigations Report 2007-5130
The ecological status of perennial streams in Wyoming was determined and compared with the status of perennial streams throughout 12 States in the western United States, using data collected as part of the Western Pilot Environmental Monitoring and Assessment Program (EMAP-West). Results for Wyoming are compared and contrasted in the...
Three-Dimensional Geologic Framework Model for a Karst Aquifer System, Hasty and Western Grove Quadrangles, Northern Arkansas
Kenzie J. Turner, Mark R. Hudson, Kyle E. Murray, David N. Mott
2007, Scientific Investigations Report 2007-5095
Understanding ground-water flow in a karst aquifer benefits from a detailed conception of the three-dimensional (3D) geologic framework. Traditional two-dimensional products, such as geologic maps, cross-sections, and structure contour maps, convey a mental picture of the area but a stronger conceptualization can be achieved by constructing a digital 3D representation...
Quantifying the benthic source of nutrients to the water column of Upper Klamath Lake, Oregon
James S. Kuwabara, Dennis D. Lynch, Brent R. Topping, Fred Murphy, James L. Carter, Nancy S. Simon, Francis Parcheso, Tamara M. Wood, Mary K. Lindenberg, Katryn Wiese, Ronald J. Avanzino
2007, Open-File Report 2007-1276
Executive Summary Five sampling trips were coordinated in April, May and August 2006, and May and July 2007 to sample the water column and benthos of Upper Klamath Lake, OR (Fig. 1; Table 1), before, during and after the annual cyanophyte bloom of Aphanizomenon flos-aquae (AFA). A pore-water profiler was designed...
Water-balance simulations of runoff and reservoir storage for the Upper Helmand watershed and Kajakai Reservoir, central Afghanistan
Kevin C. Vining, Aldo V. Vecchia
2007, Scientific Investigations Report 2007-5148
A study was performed to provide information on monthly historical and hypothetical future runoff for the Upper Helmand watershed and reservoir storage in Kajakai Reservoir that could be used by Afghanistan authorities to make economic and demographic decisions concerning reservoir design and operation, reservoir sedimentation, and development along the Helmand...
Occurrence of radium-224, radium-226 and radium-228 in water from the Vincentown and Wenonah-Mount Laurel aquifers, the Englishtown aquifer system, and the Hornerstown and Red Bank Sands, southwestern and south-central New Jersey
Vincent T. dePaul, Zoltan Szabo
2007, Scientific Investigations Report 2007-5064
This investigation is the first regionally focused study of the presence of natural radioactivity in water from the Vincentown and Wenonah-Mount Laurel aquifers, Englishtown aquifer system, and the Hornerstown and Red Bank Sands. Geologic materials composing the Vincentown and Wenonah-Mount Laurel aquifers and the Hornerstown and Red Bank Sands previously...
MF2KtoMF05UC, a Program To Convert MODFLOW-2000 Files to MODFLOW-2005 and UCODE_2005 Files
Arlen W. Harbaugh
2007, Open-File Report 2007-1204
The program MF2KtoMF05UC has been developed to convert MODFLOW-2000 input files for use by MODFLOW-2005 and UCODE_2005. MF2KtoMF05UC was written in the Fortran 90 computer language. This report documents the use of MF2KtoMF05UC....
Influence of Locally Derived Recharge on the Water Quality and Temperature of Springs in Hot Springs National Park, Arkansas
Richard W. Bell, Phillip D. Hays
2007, Scientific Investigations Report 2007-5004
The hot springs of Hot Springs National Park consist of a mixture of water from two recharge components: a primary hot-water component and a secondary cold-water component. Widespread distribution of fractures enables mixing of the hot- and cold-water components of flow near the discharge area for the springs. Urbanization in...
Development of relations of stream stage to channel geometry and discharge for stream segments simulated with Hydrologic Simulation Program-Fortran (HSPF), Chesapeake Bay Watershed and adjacent parts of Virginia, Maryland, and Delaware
Douglas Moyer, Mark Bennett
2007, Scientific Investigations Report 2007-5135
The U.S. Geological Survey (USGS), U.S. Environmental Protection Agency (USEPA), Chesapeake Bay Program (CBP), Interstate Commission for the Potomac River Basin (ICPRB), Maryland Department of the Environment (MDE), Virginia Department of Conservation and Recreation (VADCR), and University of Maryland (UMD) are collaborating to improve the resolution of the Chesapeake Bay...
Description and User Manual for a Web-Based Interface to a Transit-Loss Accounting Program for Monument and Fountain Creeks, El Paso and Pueblo Counties, Colorado
Gerhard Kuhn, Gary S. Krammes, Vivian J. Beal
2007, Scientific Investigations Report 2007-5028
The U.S. Geological Survey, in cooperation with Colorado Springs Utilities, the Colorado Water Conservation Board, and the El Paso County Water Authority, began a study in 2004 with the following objectives: (1) Apply a stream-aquifer model to Monument Creek, (2) use the results of the modeling to develop a transit-loss...
USGS Reference Materials Program: Serving the Needs of the Global Analytical Community
Ruth E. Wolf, Stephen A. Wilson
2007, Fact Sheet 2007-3056
Every year in the United States, millions of measurements are made on the chemical composition of items that affect us on a daily basis. The accuracy of these measurements is routinely determined by the analysis of appropriate reference materials. In the field of earth science, reference materials are particularly important...
Ultrahigh resolution topographic mapping of Mars with HiRISE stereo images: Methods and first results
Randolph L. Kirk, Elpitha Howington-Kraus, Mark R. Rosiek, Debbie Cook, Jeffery A. Anderson, Kris J. Becker, Brent A. Archinal, Laszlo P. Keszthelyi, R. King, Alfred S. McEwen
2007, Conference Paper, Proceedings, XXIII International Cartographic Conference
The Mars Reconnaissance Orbiter (MRO) arrived at Mars on 10 March 2006 and began its primary science phase in November. The High Resolution Imaging Science Experiment (HiRISE) on MRO is the largest, most complex camera ever flown to another planet. Plans call for this scanner to image roughly 1% of...
Cartography for lunar exploration: Current status and planned missions
Randolph L. Kirk, Brent A. Archinal, Lisa R. Gaddis, Mark R. Rosiek
2007, Conference Paper, Proceedings: XXIII International Cartographic Conference
The initial spacecraft exploration of the Moon in the 1960s–70s yielded extensive data, primarily in the form of film and television images, that were used to produce a large number of hardcopy maps by conventional techniques. A second era of exploration, beginning in the early 1990s, has produced digital data...
Relation between precipitation and the 25th percentile of June and September flows in streams in the Great Lakes, Ohio, and Upper Mississippi River Basins
Thomas A. Winterstein, David L. Lorenz
2007, Scientific Investigations Report 2007-5129
Regression models were developed for the 25th percentile of June and September flows (first quartile of flow) for 47 streamflow-gaging stations (gaging stations) in the Upper Mississippi, Ohio, and Great Lakes drainage basins. The gaging stations that were selected for this analysis are on unregulated rivers, have at least 40...
Fate and Transport Modeling of Selected Chlorinated Organic Compounds at Operable Unit 1, U.S. Naval Air Station, Jacksonville, Florida
J. Hal Davis
2007, Scientific Investigations Report 2007-5043
The U.S. Naval Air Station occupies 3,800 acres adjacent to the St. Johns River in Jacksonville, Florida. The Station was placed on the U.S. Environmental Protection Agency's National Priorities List in December 1989 and is participating in the U.S. Department of Defense Installation Restoration Program, which serves to identify and...
Escherichia coli Concentrations in the Mill Creek Watershed, Cleveland, Ohio, 2001-2004
Amie M. G. Brady
2007, Open-File Report 2007-1171
Mill Creek in Cleveland, Ohio, receives discharges from combined-sewer overflows (CSOs) and other sanitary-sewage inputs. These discharges affect the water quality of the creek and that of its receiving stream, the Cuyahoga River. In an effort to mitigate this problem, the Northeast Ohio Regional Sewer District implemented a project to...
