If you are not happy with the results below please do another search
The Brandywine Creek, which flows through a densely populated region of eastern Pennsylvania, flooded repeatedly in 2021, culminating in a record-setting flood resulting from the remnants of Hurricane Ida. The Brandywine Creek flood is one of many examples of unprecedented flooding that occurred in the Mid-Atlantic region in 2021, which suggests that any lessons learned […]
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 […]
Multi-core computer processing has made remarkable advances over the past three years and is now practically and affordably within reach of all modelers—not just those with big budgets. However, reaping the benefits of 32-, 64-, or 128-core CPU power in 2021 is not as straightforward as purchasing a dandy computer, installing software, and having at […]
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 […]
One of the first actions when evaluating a design is to select a hydrologic modeling program that evaluates the runoff-storage relationship within a contributing watershed. Sometimes this selection is made quickly without significant consideration of the end goal, or whether model results are comparable between different hydrologic programs. In theory, modelers can employ various hydrologic […]
Stormwater Master Planning helps to identify where future investments are needed by deficiencies of the existing stormwater system. At the planning stage, many assumptions are made, which are based on the best available information. But what happens when elements of that Master Plan move into design and field discoveries and phasing plans challenge these assumptions? […]
To investigate the effects of stormwater improvements (including new pump stations, stormwater bypasses and tide gates) on a small area near Annapolis harbor, an integrated 1D-2D model was developed. The effects of overland flow were pronounced in this area as tidal flooding was a consistent issue. The existing outfalls lacked functioning tide gates, resulting in […]
Driven by more intense rainfall, expansion of impervious surfaces, and aging drainage infrastructure, flash flooding in urban areas is becoming increasingly commonplace across the United States. Providing flood relief in fully developed areas is expensive and almost always subject to space constraints. Using the 2D modeling capabilities of software such as XPSWMM can reveal complexities […]
Willisburg Lake Dam is a high hazard structure which retains Willisburg Lake, the main water supply for the City of Springfield, KY and is used recreationally by the local communities. Known deficiencies at the dam include insufficient spillway capacity, seepage near the downstream toe, and an inoperable low-level outlet. The rehabilitation design had the objective […]
C.J. Bodnar, P.E.1 City of Virginia Beach When completing Stormwater Master Plans (SWMP) and formulating stormwater infrastructure improvement projects, municipalities and their consultants frequently face the difficult decisions of selecting an appropriate technical approach, developing infrastructure projects, and establishing criteria for prioritization of projects. Over the last 5 years, the City of Virginia Beach has […]
The Virginia Lakes and Watershed Association is a volunteer organization and its mission is to provide education on water resources in Virginia.
