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Showing 1 to 20 of 38 for “"Chesapeake Bay Watershed"”.
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Urban Tree Canopy Assessments in the Chesapeake Bay Watershed
… been conducted for numerous localities in the Chesapeake Bay watershed (CBW) as part of a strategy to enhance urban tree canopy (UTC) and reduce stormwater runoff that pollutes the Chesapeake Bay. Our research examined how local governments employ these UTCAs and identified barriers to and …
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Essays on Water Quality Management for the Chesapeake Bay Watershed
… nitrogen (N) loading goals for Mahantango watershed, Pennsylvania. We use the results from two climate models and the mean of the ensemble of seven climate models to estimate expected climate changes and the Soil and Water Assessment Tool-Variable Source Area (SWAT-VSA) model to predict …
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Evaluating Changes in Terrestrial Hydrological Components Due to Climate Change in the Chesapeake Bay Watershed
… Water Requirement (NIWR) throughout the Chesapeake Bay watershed in the mid-Atlantic region of the United States. The Noah-MP land surface model is calibrated and evaluated against the observed datasets of United States Geological Survey (USGS) streamflow gages, actual evapotranspiration …
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An Assessment of Impediments to Low-Impact Development in the Virginia Portion of the Chesapeake Bay Watershed
… properly will impede efforts to restore the Chesapeake Bay.Water quantity, as well as quality, must be considered, and Low Impact Development(LID) is an innovative stormwater management approach that addresses both. LID seeks to mimic a site's predevelopment hydrologic regime by retaining and …
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Quantifying the Impact of Climate Change on Water Availability and Water Quality in the Chesapeake Bay Watershed
… and greenhouse gas (GHG) emissions. The Chesapeake Bay and its watershed are subject to the largest and most expensive Total Maximum Daily Load (TMDL) ever developed. It is unclear if the TMDL can be met given climate change and variability (e.g., extreme weather events). The objective of …
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Assessing Landowner Level Costs for Riparian Forest Buffer System Adoption on Farms in Virginia's Chesapeake Bay Watershed
… characteristics and functions of RFBS in the Chesapeake Bay Watershed. Section A argues that RFBS design and site characteristics alter the physical ability of RFBS to produce environmental services. Altering design specifications may come at little environmental loss but might greatly reduce …
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Simulating the Cost and Legacy N Reduction Potential of Denitrifying Spring Bioreactors Installation in the Chesapeake Bay Watershed
The nitrogen reduction goals for the Chesapeake Bay are proving particularly difficult achieve. One of the contributing sources of N loading to the Bay is legacy N from groundwater springs. Denitrifying spring bioreactors are a best management practice that offers an opportunity to abate N from …
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Effect of Golf Course Turfgrass Management on Water Quality of Non-tidal Streams in the Chesapeake Bay Watershed
… have been identified as a possible source of Chesapeake Bay nutrient pollution. Total Maximum Daily Load goals are in place to reduce nutrient amounts entering the Bay. Dissertation investigations include (1) the role of golf course turfgrass management in nutrient deposition or attenuation in …
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Invasion Genetics of the Blue Catfish (Ictalurus Furcatus) Range Expansion into Large River Ecosystems of the Chesapeake Bay Watershed
… invasive, nonnative species of concern in the Chesapeake Bay watershed. This species, intentionally introduced to three major tributaries and a number of impoundments between 1974 and 1989 for sport fishing, has spread into three additional tributaries. Using samples from the introduced …
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Meteorological Impacts on Streamflow: Analyzing Anthropogenic Climate Change's Effect on Runoff and Streamflow Magnitudes in Virginia's Chesapeake Bay Watershed
… 31 general circulation models (GCMs) used by the Chesapeake Bay Program (CBP). Trends are compared with surface runoff generation patterns for a variety of land uses to investigate climate's effect on runoff generation. Scenarios representing pairings of the tenth, fiftieth, and ninetieth …
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The Economic Feasibility of Partially Replacing Coal with Poultry Litter during the Production fo Energy in Virginia's Chesapeake Bay Watershed
… excess land application of poultry litter in the Chesapeake Bay Watershed has caused damage to the Chesapeake Bay and lead to the need for alternative poultry litter disposal methods. This study provided an economic feasibility analysis of the use of poultry litter as a partial replacement of coal …
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Comparing Two Methods for Developing Local Sediment TMDLs to Address Benthic Impairments
… often determined using a non-impaired reference watershed, i.e., the reference watershed approach (RWA). The RWA has historically been used in Virginia to establish TMDL target sediment loads because there is no numeric ambient water quality criterion for sediment. The difference between the …
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Soil Moisture-driven Drought Evaluation under Present and Future Conditions
… to derive multiple drought indices for the Chesapeake Bay watershed and five river basins in Virginia. The results indicate that current climate change projections will lead to increased drought in the entire Chesapeake Bay watershed and Virginia river basins because of increases in the sum …
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Toward Conservation of Magnolia Bogs on Utility Rights-Of-Way: Increasing Imageability
… known only to the gravelly sands of the inner Chesapeake Bay watershed. Scattered across upland landscapes just east of the fall-line, these habitats occur where lenses of clay intersect the rolling terrain and groundwater seeps along the faces of hillsides. Most Magnolia Bogs have been lost to …
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Rising Water: Harnessing the Process of Sedimentation for a Flood Resilient Coastal Landscape
… vulnerable land, and sedimentation within the Chesapeake Bay watershed. Climate induced sea level rise threatens low lying coastal land, especially in regions of continuing subsidence such as the Chesapeake Bay. Alterations to shorelines over time have impacted the ability of coastal landscapes …
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Best Management Practice Use and Efficacy for the Virginia Nursery and Greenhouse Industry
… on contaminants entering waters such as the Chesapeake Bay Watershed. Research is lacking on which BMPs are most widely used or most efficacious for Virginia nursery and greenhouse growers. Objectives of this work were to determine BMP use, barriers to adoption, and scientific efficacy. We …
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Hetero-functional Graph Theory for Convergent Systems of Systems: Model-Based Applications in Watershed and Economic Systems
… The approach is then extended to larger watershed systems and instantiated for the Chesapeake Bay Watershed. The approach classifies watershed systems under the HFGT meta-architecture then develops a watershed-specific Weighted Least Squares Error HFGT State Estimator to infer nitrogen …
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Performance Analysis of the Ashby Stormwater Retention Pond in Fairfax City, Virginia
… urbanized tributary of the Potomac River and Chesapeake Bay that is listed on the State of Virginia 303(d) list for multiple impairments. The entire multi-state Chesapeake Bay Watershed is subject to Total Maximum Daily Load (TMDL) restrictions on sediment, phosphorus and nitrogen. Virginia …
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Using Monte Carlo Analysis to Assess Outcome-based Payment for Environmental Services for Denitrifying Bioreactors in the Chesapeake Bay
… simulation to a case study bioreactor in the Chesapeake Bay Watershed to estimate the financial risks and rewards to N removal service providers under different outcome-based PES contractual conditions. Results indicate that under a fifteen-year contract term and price of $25/lb/yr of nitrogen …
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