Assessment of arsenic concentrations in domestic well water, by town, in Maine 2005-09
M.G. Nielsen, P.J. Lombard, L.F. Schalk
2010, Scientific Investigations Report 2010-5199
Prior studies have established that approximately 10 percent of domestic wells in Maine have arsenic levels greater than the U.S. Environmental Protection Agency maximum contaminant limit (10 micrograms per liter (ug/L)). Of even greater concern are multiple discoveries of wells with very high arsenic levels (> 500 ug/L) in several...
The Difference Between the Potentiometric Surfaces of the Aquia Aquifer in Southern Maryland, September 1982 and September 2009
Stephen E. Curtin, David C. Andreasen, Andrew W. Staley
2010, Open-File Report 2010-1202
This report presents a map showing the change in the potentiometric surface of the Aquia aquifer in the Aquia Formation of Paleocene age in Southern Maryland between September 1982 and September 2009. The map, based on water level differences obtained from 49 wells, shows that the potentiometric surface during the...
The Difference Between the Potentiometric Surfaces of the Magothy Aquifer in Southern Maryland, September 1975 and September 2009
Stephen E. Curtin, David C. Andreasen, Andrew W. Staley
2010, Open-File Report 2010-1204
This report presents a map showing the change in the potentiometric surface of the Magothy aquifer in the Magothy Formation of Late Cretaceous age in Southern Maryland between September 1975 and September 2009. The map, based on water level differences obtained from 48 wells, shows that during the 34-year period,...
The difference between the potentiometric surfaces of the Upper Patapsco aquifer in southern Maryland, September 1990 and September 2009
Stephen E. Curtin, David C. Andreasen, Andrew W. Staley
2010, Open-File Report 2010-1206
This report presents a map showing the change in the potentiometric surface of the upper Patapsco aquifer in the Patapsco Formation of Early Cretaceous age in Southern Maryland between September 1990 and September 2009. The map, based on water level differences obtained from 33 wells, shows that during the 19-year...
Potentiometric Surface of the Patuxent Aquifer in Southern Maryland, September 2009
Stephen E. Curtin, David C. Andreasen, Andrew W. Staley
2010, Open-File Report 2010-1209
This report presents a map showing the potentiometric surface of the Patuxent aquifer in the Patuxent Formation of Early Cretaceous age in Southern Maryland during September 2009. The map is based on water-level measurements in 42 wells. The highest measured water level was 169 feet above sea level in the...
Hydrologic Data for Deep Creek Lake and Selected Tributaries, Garrett County, Maryland, 2007-08
William S.L. Banks, William J. Davies, Allen C. Gellis, Andrew E. LaMotte, Wendy S. McPherson, Daniel J. Soeder
2010, Open-File Report 2010-1092
Introduction Recent and ongoing efforts to develop the land in the area around Deep Creek Lake, Garrett County, Maryland, are expected to change the volume of sediment moving toward and into the lake, as well as impact the water quality of the lake and its many tributaries. With increased development,...
Improved USGS methodology for assessing continuous petroleum resources
Ronald R. Charpentier, Troy A. Cook
2010, Data Series 547
This report presents an improved methodology for estimating volumes of continuous (unconventional) oil and gas resources within the United States and around the world. The methodology is based on previously developed U.S. Geological Survey methodologies that rely on well-scale production data. Improvements were made primarily to how the uncertainty about...
Social Values for Ecosystem Services (SolVES): using GIS to include social values information in ecosystem services assessments
B.C. Sherrouse, D.J. Semmens
2010, Fact Sheet 2010-3118
Ecosystem services can be defined in various ways; simply put, they are the benefits provided by nature, which contribute to human well-being. These benefits can range from tangible products such as food and fresh water to cultural services such as recreation and esthetics. As the use of these benefits continues...
Potentiometric surface of the Upper Patapsco aquifer in southern Maryland, September 2009
Stephen E. Curtin, David C. Andreasen, Andrew W. Staley
2010, Open-File Report 2010-1205
This report presents a map showing the potentiometric surface of the upper Patapsco aquifer in the Patapsco Formation of Early Cretaceous age in Southern Maryland during September 2009. The map is based on water-level measurements in 65 wells. The highest measured water level was 118 feet above sea level near...
Potentiometric Surface of the Lower Patapsco Aquifer in Southern Maryland, September 2009
Stephen E. Curtin, David C. Andreasin, Andrew W. Staley
2010, Open-File Report 2010-1207
This report presents a map showing the potentiometric surface of the lower Patapsco aquifer in the Patapsco Formation of Early Cretaceous age in Southern Maryland during September 2009. The map is based on water-level measurements in 64 wells. The highest measured water level was 110 feet above sea level near...
Potentiometric Surface of the Magothy Aquifer in Southern Maryland, September 2009
Stephen E. Curtin, David C. Andreasen, Andrew W. Staley
2010, Open-File Report 2010-1203
This report presents a map showing the potentiometric surface of the Magothy aquifer in the Magothy Formation of Late Cretaceous age in Southern Maryland during September 2009. The map is based on water-level measurements in 66 wells. The highest measured water level was 85 feet above sea level near the...
Occurrence and Distribution of Organic Wastewater Compounds in Rock Creek Park, Washington, D.C., 2007-08
Daniel J. Phelan, Cherie V. Miller
2010, Scientific Investigations Report 2010-5162
The U.S. Geological Survey, and the National Park Service Police Aviation Group, conducted a high-resolution, low-altitude aerial thermal infrared survey of the Washington, D.C. section of Rock Creek Basin within the Park boundaries to identify specific locations where warm water was discharging from seeps or pipes to the creek. Twenty-three...
Estimation of selected streamflow statistics for a network of low-flow partial-record stations in areas affected by Base Realignment and Closure (BRAC) in Maryland
Kernell G. Ries III, Ken Eng
2010, Scientific Investigations Report 2010-5170
The U.S. Geological Survey, in cooperation with the Maryland Department of the Environment, operated a network of 20 low-flow partial-record stations during 2008 in a region that extends from southwest of Baltimore to the northeastern corner of Maryland to obtain estimates of selected streamflow statistics at the station locations. The...
Calculation of aftershock accumulation from observed postseismic deformation: M6 2004 Parkfield, California, earthquake
James C. Savage
2010, Geophysical Research Letters (37) 1-4
[1] The postseismic stress accumulation τ(t) over the interval 0.004 to 880 days following the 2004 Parkfield earthquake (M6) can be inferred from GPS measurements of postseismic deformation. The stress relaxation τ(t) − τ′lt, where τ′l is the interseismic loading rate and t is the time after the earthquake, plotted as a function of the number of...
Quantifying effects of climate change on the snowmelt-dominated groundwater resources of northern New England
Robert W. Dudley, Glenn A. Hodgkins, James B. Shanley, Thomas J. Mack
2010, Fact Sheet 2010-3104
Recent U.S. Geological Survey (USGS) climate studies in New England have shown substantial evidence of hydrologic changes during the last 100 years, including trends toward earlier snowmelt runoff, decreasing occurrence of river ice, and decreasing winter snowpack. These studies are being expanded to include investigation of trends in groundwater levels...
Report of the IAU Working Group on cartographic coordinates and rotational elements: 2009
Brent A. Archinal, Michael F. A’Hearn, Edward Bowell, Al Conrad, Guy J. Consolmagno, Regis Courtin, Toshio Fukushima, Daniel Hestroffer, James L. Hilton, Georgij A. Krasinsky, Gregory Neumann, Jurgen Oberst, P. Kenneth Seidelmann, Philip Stooke, David J. Tholen, Peter C. Thomas, Iwan P. Williams
2010, Celestial Mechanics and Dynamical Astronomy (109) 101-135
Every three years the IAU Working Group on Cartographic Coordinates and Rotational Elements revises tables giving the directions of the poles of rotation and the prime meridians of the planets, satellites, minor planets, and comets. This report takes into account the IAU Working Group for Planetary System Nomenclature (WGPSN) and...
Occurrence of Escherichia coli in the Cuyahoga River in the Cuyahoga Valley National Park, Ohio
Amie M. G. Brady, Meg B. Plona
2010, Fact Sheet 2010-3068
There are several measures of the 'cleanliness' of a natural body of water, including concentrations of indicator bacteria, anthropogenic chemicals (chemicals derived from human activities), and nutrients, such as nitrogen and phosphorous. Escherichia coli (E. coli) is a bacterium that lives in the intestinal tract of warm-blooded animals, such as...
Groundwater-flow assessment of the Mississippi River Valley alluvial aquifer of northeastern Arkansas
John B. Czarnecki
2010, Scientific Investigations Report 2010-5210
The Mississippi River Valley alluvial aquifer is a water-bearing assemblage of gravels and sands that underlies about 32,000 square miles of Arkansas, Kentucky, Louisiana, Mississippi, Missouri, and Tennessee. Pumping of groundwater from the alluvial aquifer for agriculture started in the early 1900s in the Grand Prairie area for the irrigation...
Water quality (2000-08) and historical phosphorus concentrations from paleolimnological studies of Swamp and Speckled Trout Lakes, Grand Portage Reservation, northeastern Minnesota
Victoria G. Christensen, Perry M. Jones, Mark B. Edlund, Joy M. Ramstack
2010, Scientific Investigations Report 2010-5192
A paleolimnological approach was taken to aid the Grand Portage Reservation, in northeastern Minnesota, in determining reference conditions for lakes on the reservation. The U.S. Geological Survey, in cooperation with the Grand Portage Band of Chippewa Indians and the Science Museum of Minnesota, conducted a study to describe water quality...
Southeast Ecological Science Center
Rachel J. Pawlitz
2010, Fact Sheet 2010-3111
Aquatic ecosystems, from deep sea reefs and coastal marshes to freshwater springs and wetlands, are home to diverse assemblages of life. These commercially and ecologically important systems are part of our national heritage, and are often treasured places or refuges that protect rare or threatened species. In the water-rich Southeastern...
Drought Monitoring with VegDRI
Jesslyn F. Brown
2010, Fact Sheet 2010-3114
Drought strikes somewhere in the United States every year, turning green landscapes brown as precipitation falls below normal levels and water supplies dwindle. Drought is typically a temporary climatic aberration, but it is also an insidious natural hazard. It might last for weeks, months, or years and may have many...
Thunderstorms and flooding of August 17, 2007, with a context provided by a history of other large storm and flood events in the Black Hills area of South Dakota
Daniel G. Driscoll, Matthew J. Bunkers, Janet M. Carter, John F. Stamm, Joyce E. Williamson
2010, Scientific Investigations Report 2010-5187
The Black Hills area of western South Dakota has a history of damaging flash floods that have resulted primarily from exceptionally strong rain-producing thunderstorms. The best known example is the catastrophic storm system of June 9-10, 1972, which caused severe flooding in several major drainages near Rapid City and resulted...
Geochemical evolution processes and water-quality observations based on results of the National Water-Quality Assessment Program in the San Antonio segment of the Edwards aquifer, Texas, 1996-2006
MaryLynn Musgrove, Lynne Fahlquist, Natalie A. Houston, Richard J. Lindgren, Patricia B. Ging
2010, Scientific Investigations Report 2010-5129
As part of the National Water-Quality Assessment Program, the U.S. Geological Survey collected and analyzed groundwater samples during 1996-2006 from the San Antonio segment of the Edwards aquifer of central Texas, a productive karst aquifer developed in Cretaceous-age carbonate rocks. These National Water-Quality Assessment Program studies provide an extensive dataset...
Assessment of goods and valuation of ecosystem services (AGAVES) San Pedro River Basin, United States and Mexico
Darius J. Semmens, William Kepner, David Goodrich
2010, Fact Sheet 2010-3082
A consortium of federal, academic, and nongovernment organization (NGO) partners have established a collaborative research enterprise in the San Pedro River Basin to develop methods, standards, and tools to assess and value ecosystem goods and services. The central premise of ecosystem services research is that human condition is intrinsically linked...
Possible effects of groundwater pumping on surface water in the Verde Valley, Arizona
Stanley A. Leake, Jeanmarie Haney
2010, Fact Sheet 2010-3108
The U.S. Geological Survey (USGS), in cooperation with The Nature Conservancy, has applied a groundwater model to simulate effects of groundwater pumping and artificial recharge on surface water in the Verde Valley sub-basin of Arizona. Results are in two sets of maps that show effects of locations of pumping or...
