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The role of the eight coastal planning district and regional commissions (PDCs/RCs) in regional environmental services has been growing with increased support from federal programs to provide technical assistance to member localities. The Virginia Department of Environmental Quality, administering federal funds for coastal zone management and water quality improvement programs, asks PDCs to prepare scopes […]
Chesapeake’s Greenbrier Drainage Area experienced significant street and parcel flooding during Hurricane Matthew, when more than 11 inches of rain fell on October 8th and 9th, 2016. Some streets became impassible, and key roadway intersections experienced prolonged flooding. The floodwaters were slow to recede. In response to this and other severe storm events, engineers from […]
Modeling stormwater facilities accurately in hydraulic programs depends greatly on facility specific characteristics, including stage-storage and elevation-discharge curves. It is typically assumed that these facilities are in ‘good’ operating condition with full design capacity. True field conditions, however, may uncover factors prohibiting these facilities from achieving true design capacities. It is imperative that best management […]
In August 2022, GKY and Associates, Inc. (GKY) submitted the Salters Creek Watershed Study report to the City of Hampton. GKY employed a combined 1D/2D model using PCSWMM to quantify existing condition flooding and then identified potential improvement projects to reduce that flooding. The study identified fifteen specific improvement projects to reduce the depth and […]
Like many coastal communities, Virginia Beach is experiencing more frequent flooding due to sea level rise, increased storm intensity, and aging infrastructure. These issues coupled with tidal impacts and low elevations has resulted in severe flooding in portions of the City. Hurricane Matthew (2016) resulted in the worst structural flooding ever experienced. As a result, […]
Due to frequent flooding, erosion, and debris collection at two stream crossings through a perimeter security road at Washington Dulles International Airport (IAD), the Metropolitan Washington Airports Authority (Authority) contacted JMT to identify the cause(s) of excessive stormwater discharge. Existing conditions on the site were posing critical environmental and safety concerns to IAD, and the […]
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.
