A5089803875- Hydrology and Watershed Management Studies
- Urban Stormwater Management Solutions
- Land Use and Ecosystem Services
- Flood Risk Assessment and Management
- Peatlands and Wetlands Ecology
- Soil and Water Nutrient Dynamics
- Hydrology and Sediment Transport Processes
- Economic and Environmental Valuation
- Soil erosion and sediment transport
- Fire effects on ecosystems
- Forest Management and Policy
- Atmospheric and Environmental Gas Dynamics
- Coastal wetland ecosystem dynamics
- Remote-Sensing Image Classification
- Urban Heat Island Mitigation
- Phosphorus and nutrient management
- Optical Polarization and Ellipsometry
- Climate change and permafrost
- Scientific Computing and Data Management
- Remote Sensing and LiDAR Applications
- Urban Green Space and Health
- Water resources management and optimization
- Geographic Information Systems Studies
- Urban Planning and Valuation
- Sustainable Agricultural Systems Analysis
United States Geological Survey
2011-2022
Western Geographic Science Center
2011-2018
George Mason University
2004-2007
Abstract A novel form of urbanization, low impact development (LID), aims to engineer systems that replicate natural hydrologic functioning, in part by infiltrating stormwater close the impervious surfaces generate it. We sought statistically evaluate changes a base flow regime because urbanization with LID, specifically magnitude, seasonality, and rate change. used case study watershed Clarksburg, Maryland, which streamflow was monitored during whole‐watershed from forest agricultural...
ABSTRACT Stormwater management infrastructure is utilized in urban areas to alleviate flooding caused by decreased landscape permeability from increased impervious surface cover (ISC) construction. In this study, we examined two types of stormwater detention basins, SDB‐BMPs (stormwater basin‐best practice), and SDB‐FCs basin–flood control). Both are constructed retain peak flows for flood mitigation. However, the also designed using basin topography wetland vegetation provide water quality...
Abstract Distributed, infiltration‐based approaches to stormwater management are being implemented mitigate effects of urban development on water resources. One the goals this type storm management, sometimes called low impact or green infrastructure, is maintain groundwater recharge and stream base flow at predevelopment levels. However, connection between not straightforward. Water infiltrated through facilities may be stored in soil moisture, taken up by evapotranspiration contribute...
Urban development is a well-known stressor for stream ecosystems, presenting challenge to managers tasked with mitigating its effects. For the past 20 y, streamflow, water quality, geomorphology, and benthic communities were monitored in 5 watersheds Montgomery County, Maryland, USA. This study presents synthesis of multiple studies monitoring efforts area new analysis more recent data document primary lessons learned from monitoring. The include forested control, an urban control...
Abstract This collaborative study examined urbanization and impacts on area streams while using the best available sediment erosion control (S&EC) practices in developing watersheds Maryland, United States. During conversion of agricultural forested to urban land use, surface topography was graded vegetation removed creating a high potential for generation release during storm events. The currently S&EC facilities were used development process mitigate runoff water quality, quantity,...
Abstract Stormwater runoff and associated pollutants from urban areas in the greater Chesapeake Bay Watershed ( CBW ) impair local streams downstream ecosystems, despite urbanized land comprising only 7% of area. More recently, stormwater best management practices BMP s) have been implemented a low impact development LID manner to treat closer its source. This approach included novel model compare traditional design, pioneering use comprehensively digitized storm sewer infrastructure design...
Urbanization can degrade water quality and alter watershed hydrology, with profound effects on the structure function of both riparian wetlands (RWs) aquatic ecosystems downstream. We used freshwater RWs in Fairfax County, Virginia, USA, as a model system to examine: (1) increasing urbanization (indexed by percentage impervious surface cover [%ISC] surrounding watershed) nitrogen (N) phosphorus (P) concentrations soils plant tissues, soil P saturation, iron (Fe) chemistry; (2) relationships...
Carbon storage potential has become an important consideration for land management and planning in the United States. The ability to assess ecosystem carbon balance can help managers understand benefits tradeoffs between different strategies. This paper demonstrates application of Land Use Scenario Simulator (LUCAS) model developed local-scale at Great Dismal Swamp National Wildlife Refuge. We estimate net by considering past disturbances resulting from storm damage, fire, actions including...
The Great Dismal Swamp, a freshwater forested peatland, has accumulated massive amounts of soil carbon since the postglacial period. Logging and draining have severely altered hydrology forest composition, leading to drier soils, accelerated oxidation, vulnerability disturbance. once dominant Atlantic white cedar, cypress, pocosin types are now fragmented, resulting in maple-gum communities replacing over half remaining area. In order determine effect environmental variabes on emissions,...
Abstract Understanding the efficacy of revised watershed management methods is important to mitigating impacts urbanization on streamflow. We evaluated influence land use change, primarily as urbanization, and stormwater control measures relationship between precipitation stream discharge over an 8‐year period for five catchments near Clarksburg, Montgomery County, Maryland, USA. A unit‐hydrograph model based a temporal transfer function was employed account standardize variation in rainfall...
The South Florida Ecosystem Portfolio Model (EPM) prototype is a regional land-use planning Web tool that integrates ecological, economic, and social information values of relevance to decision-makers stakeholders. EPM uses multicriteria evaluation framework builds on geographic system-based (GIS) analysis spatially-explicit models characterize important societal endpoints consequences are sensitive land-use/land-cover (LULC) change. both economics (monetized) multiattribute utility...
Abstract Under‐representations of headwater channels in digital stream networks can result uncertainty the magnitude habitat loss, burial, and watershed function. Increased availability high‐resolution (<2 m) elevation data makes delineation more attainable. In this study, derived from light detection ranging was used to predict ephemeral across a forested urban Maryland Piedmont USA. A method developed using topographic openness (TO) wetness index remotely extent networks. Predicted were...
Abstract Stormwater best management practices (BMPs) are engineered structures that attempt to mitigate the impacts of stormwater, which can include nitrogen inputs from surrounding drainage area. The goal this study was assess bacterial community composition in different types stormwater BMP soils establish whether a particular type harbors more denitrification potential. Soil sampling took place over summer 2015 following precipitation events. Soils were sampled four bioretention...