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Societal water-use estimates were required for the other four components of the Coastal Carolinas focus area study. Estimates of water withdrawals related to the societal water use included categories of public supply, self-supplied domestic, industrial, thermoelectric power, irrigation for crops and golf courses, livestock, mining, and aquaculture. Estimates for wastewater returns to surface water bodies were also needed for the surface-water modeling component of the project. These estimates were derived from site-specific data when available or disaggregated from county level information previously published in the USGS series of national water-use reports. These reports were facilitated by the USGS National...
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This layer represents fundamentally suitable and unsuitable habitat for freshwater mussels in the Meramec Basin as modeled by these authors on May 17, 2017 based on spatial data ranging from 1990 to 2014. Identification of habitat characteristics associated with the presence of freshwater mussels is challenging but crucial for the conservation of this declining fauna. Most mussel species are found in multi-species assemblages suggesting that physical factors influence presence similarly across species. In lotic environments, geomorphic and hydraulic characteristics appear to be important factors for predicting mussel presence. We used maximum entropy (MaxEnt) modeling to evaluate hydrogeomorphic variables associated...
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An existing biological response model of fish populations in the Tennessee and Apalachicola, Chattahoochee, Flint (ACF) River basins, and an existing biological response model of invertebrates in Delaware and NC will serve as the starting points for the development of empirical flow-biology response models for the Yadkin/Pee Dee/Waccamaw and Cape Fear River basins. The existing ecological response models will be used to determine if the land-use and streamflow characteristics that are important in determining biological responses in the existing models are also important in the Yadkin/Pee Dee/Waccamaw and Cape Fear River basins or whether other variables are more important in determining responses. These comparisons...
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The Red River Basin of New Mexico, Oklahoma, Texas, Arkansas, and Louisiana was chosen as a focus area study (FAS) as part of the U.S. Geological Survey (USGS) National Water Census (NWC). The objective of the NWC is to place technical information and tools in the hands of stakeholders so that they can make decisions on water availability. With this set objective, the USGS Water Science Centers in New Mexico, Oklahoma, Texas, Arkansas, and Louisiana conducted a study of water use and availability for the Red River Basin to improve water withdrawal estimates and investigate trends in water resources under future climate conditions and increased water withdrawals using groundwater and surface-water models (MODFLOW...
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Integrated land- and water-use planning strategies are gaining attention as means to inform consideration of more water-efficient urbanization patterns in response to uncertain water availability. We coupled climate and land change projections with empirically-derived coefficient estimates of development-related water demand to project water demand under future conditions of environmental change. Development-related water demand, used to characterize the water footprint of urbanization, is classified as the combined use of public water supply, domestic self-supply and industrial self-supply. We simulated two scenarios of urban growth from 2012 to 2065 using the FUTure Urban-Regional Environment Simulation (FUTURES)...
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In 2014, the Upper Rio Grande Basin (URGB) of Colorado, New Mexico, Texas, and northern Mexico was chosen as a focus area study (FAS) for the U.S. Geological Survey (USGS) National Water Census. The three main objectives of the USGS National Water Census are to (1) provide a nationally consistent set of indicators that reflect each status and trend relating to the availablity of water resources in the United States, (2) provide information and tools that allow users to better understand the flow requirements for ecological purposes, and (3) report on areas of significant competition over water resources and the factors that have led to the competition. The URGB FAS will help meet these objectives through an integrated,...
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The Coastal Carolinas Focus Area Study (CC FAS) examines water availability and use to meet competing societal and ecological needs in Southeastern Atlantic Coastal Basins of the Carolinas. The study area is focused along the coastline of the Carolinas, extending from Georgetown, South Carolina to Wilmington, North Carolina, and includes lower parts of the Cape Fear River and Pee Dee River basins. Projected changes in population, land-use, and climate is expected to place significant stress on water resources in the Coastal Carolinas. To investigate impacts from these stressors, this study was divided into five distinct components: (1) Societal Water-Use Data Compilation and Refinement, (2) Land-use, Population,...
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Surface-water models are being developed to simulate streamflow at existing USGS gaging stations and other ungaged locations in and upstream of the Coastal Basins of the Carolinas. The models will be used to simulate the potential effects of projected changes in water-use, climate, and urbanization through the year 2065. The Soil and Water Assessment Tool (SWAT) is being used to develop the models. The SWAT model is a physically-based watershed model with the capability of incorporating water-use data. The model operates on a daily time step, which is necessary to support the data input requirements of future ecological response modeling. The models are being calibrated to the period 2000-2014 and will subsequently...
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The Atlantic Coastal Plain aquifers and confining units of North and South Carolina are composed of crystalline carbonate rocks, sand, clay, silt, and gravel and contain large volumes of high-quality groundwater. Some of these aquifers have a long history of use dating back to the earliest days of European settlement in the late 1600’s. Groundwater use from the Atlantic Coastal Plain aquifers in North and South Carolina has increased during the past 70 years as the population has increased along with demands for municipal, industrial, and agricultural water needs. While North and South Carolina work to increase development of water supplies in response to the rapid growth occurring in these coastal areas, the States...
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    map background search result map search result map Coastal Carolinas Focus Area Study Upper Rio Grande Basin Focus Area Study Red River Focus Area Study Ecological Response Modeling Surface-water Modeling Land-use, Population, Water-Use and Climate Change Scenarios Niche model results predicting fundamentally suitable and unsuitable habitat for freshwater mussel concentrations in the Meramec Basin Niche model results predicting fundamentally suitable and unsuitable habitat for freshwater mussel concentrations in the Meramec Basin Coastal Carolinas Focus Area Study Ecological Response Modeling Surface-water Modeling Upper Rio Grande Basin Focus Area Study Land-use, Population, Water-Use and Climate Change Scenarios Red River Focus Area Study