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Streamflow conditions, and trends thereof, are critical drivers of all aspects of stream geomorphology, sediment and nutrient transport, and ecology. Using the non-parametric Mann-Kendall test, we analyzed annual streamflow trends from 1996 to 2021 for the Southern Appalachian region. The forested highlands receive high amounts of rain and act as a “water tower” for the […]
The Hare Snipe Creek watershed is a 7.2 square mile watershed located in northwestern Raleigh, North Carolina. The watershed is nearly fully developed and undergoing redevelopment, and experiences regular flooding events that negatively impact residents. Brown and Caldwell developed an integrated watershed study for the City of Raleigh to help identify and evaluate potential flood […]
Many communities in Virginia and across the country suffer from routine and often severe flooding due to a combination of riverine impacts and old, undersized stormwater collection systems. But how many communities have the opportunity to developed detailed hydrologic and hydraulic models of both systems on a watershed scale? The City of Fayetteville NC had […]
The Stormwater Management sector continues to develop and grow. With the passage of the 1987 Clean Water Act amendments, urban and suburban stormwater began to be addressed. While the legal and regulatory basis of stormwater has been around for 36 years, Phase I communities began to be permitted in 1990 and Phase II communities in […]
Decades-old dams often become higher risk as they age, but owners might have limited resources for assessing the actual risks. A semi-quantitative risk assessment (SQRA) offers a solution. South River Dam #19 (SR-19), a flood control structure built in 1956 by the USDA-Soil Conservation Service near Waynesboro, Virginia, was designed as a low hazard structure […]
To understand how a stormwater drainage system functions, calculations and analysis must be performed. This analysis and calculations can be performed via a large number of methodologies. Over the last 7 years, using PCSWMM, the City of Virginia Beach has developed a SWMM model of its Primary Stormwater Management System (PSMS). Each portion of developing […]
The flood control dams of the Beautiful Run Watershed were constructed during the 1960’s by the National Resources Conservation Service (NRCS) in Madison County, Virginia. The dams are sponsored by the Culpeper Soil and Water Conservation District (SWCD). Six of the eight total Beautiful Run dams were originally constructed with bituminous coated corrugated metal pipe […]
The National Watershed Research Network (NWRN) is a collaborative that helps communities achieve clean water and healthy watersheds by funding applied research on topics determined by its members. Together, we aim to provide insights into the impacts of land use activities on water resources, and identify regulations, programs, and practices that can best prevent or […]
About a decade ago, Timmons Group was contacted to help address localized flooding issues on the historic Virginia State University campus. Careful consideration by the University’s Capital Outlay and Facilities Management Department resulted in selection of a professional engineering services organization with a keen understanding of the state’s changing stormwater regulations and preference for sustainable […]
Many communities across the U.S. suffer from routine and severe flooding due to a combination of riverine impacts and old, undersized stormwater collection systems, especially in urban areas. But how many communities develop detailed hydrologic and hydraulic models of both systems on a watershed scale and use these models to transform their downtown with holistic […]
The Virginia Lakes and Watershed Association is a volunteer organization and its mission is to provide education on water resources in Virginia.
