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Harmful Algal Blooms (HABs) occur when aquatic conditions are optimal for algal growth, produce toxins that are harmful to humans and aquatic species, and are often triggered by warm temperatures and increased nutrient loads from human activity. Reactionary approaches can offer temporary solutions, but holistic site planning helps identify the full range of water quality […]
Among the challenges faced by municipal stormwater management programs, the management of invasive flora and fauna often prove as challenging as any. In recent years, Fairfax County, among only a handful of Virginia jurisdictions, has discovered an invasive plant that threatens both County stormwater quality as well as the functionality of the stormwater retention basins […]
The U.S. Geological Survey, in cooperation with Virginia Department of Environmental Quality, is conducting two studies to better understand the drivers of harmful algal blooms (HABs) in Lake Anna and the upper Shenandoah River Basin in Virginia. Excessive algae in streams and lakes may adversely impact the ecosystem, reduce the water quality, and, if toxigenic […]
American Society of Civil Engineers (ASCE)-Environmental and Water Resources Institute’s (EWRI) Total Maximum Daily Load (TMDL) Analysis and Modeling Task Committee is releasing a new Manual of Practice (MOP) No. 150 on TMDL Development and Implementation: Models, Methods, and Resources in February/March 2022. The MOP was written by members of the Task Committee, edited by […]
Urbanization results in higher runoff, sediment, and nutrients loadings, causing degraded water quality downstream. Event mean concentration (EMC) is a common method used in most watershed models for estimating nutrients and sediment loads in urban runoff. Land use and antecedent dry period (ADP) are known factors affecting water quality (WQ) EMCs; however, several studies have shown […]
Effects of Instantaneous and Continuous spill of Radium-226/224 and total uranium loading scenarios for Coles Hill Uranium Mine, Virginia was modeled to evaluate subsequent water quality impact to the Banister River, which feeds into the mouth of Lake Gaston that serves as the main drinking water supply source for Cities of Norfolk, Virginia Beach and […]
Almost every Virginia community is working diligently to incorporate green infrastructure and water quality improvement projects into their long-range master planning vision and goals. The City of Portsmouth identified Court Street, located in the Olde Towne Historic District, as an opportunity for a green street retrofit pilot project to improve water quality and reduce runoff […]
This study assessed the trade-offs inherent in stream restorations using the Regenerative Stream Conveyance (RSC) or restored stream-wetland technique. Specifically, it quantifies the aquatic vertebrate community trajectories that should be expected from RSC restorations implemented in lowland Coastal Plain streams with nutrient-rich waters. We defined the reference conditions (minimally-disturbed) for Coastal Plain aquatic vertebrate communities […]
The Total Maximum Daily Load (TMDL) Analysis and Modeling Task Committee of the American Society of Civil Engineers (ASCE) Environmental and Water Resources Institute (EWRI) was formed to address concerns over the current practices of analysis and modeling in TMDL development and implementation in terms of analysis technique and model selection, data requirement, calibration, validation, […]
State and federal regulations are becoming more stringent to combat the negative impacts of sediment and other contaminants that enter our water resources via erosion, stormwater, and dewatering. Sediment that is transported following erosion caused by land disturbing activities is one of the most prolific causes of pollution in our water resources. Strengthened erosion, sediment, […]
The Virginia Lakes and Watershed Association is a volunteer organization and its mission is to provide education on water resources in Virginia.
