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As streams incise and erode, their vital interaction with the abandoned floodplain, or terrace, continues to decrease. This not only flushes excess sediment and pollutants downstream but separates the floodplain ecosystem from its source of life: the stream. Reconnecting the stream to a floodplain is critical for a successful restoration and has been incentivized through […]
The National Flood Insurance Program is phasing in a new way of measuring flood risk and calculating flood insurance premiums. Here’s a hint-we will no longer be using Flood Insurance Rate Maps to rate flood insurance policies! Join us for an overview of our new methodology, new rating variables, and what it means to NFIP […]
The Integrated Flood Observing and Warning System (IFLOWS) has been a program housed within the Virginia Department of Emergency Management (VDEM) for 30+ years. The network was originally designed and funded by the National Weather Service (NWS) in the late 1970s and early 1980s in several Appalachian states including VA, WV, and KY. The primary […]
Timmons Group is providing drainage and environmental improvement services to reduce water/flooding impacts along a major waterway in Danville, VA. The Dan River is a 214 mile long and 3,300 square mile river basin in the Roanoke River Basin. The City of Danville straddles the river that spikes by ~10’ in a 100-year storm and […]
The Federal Emergency Management Agency’s (FEMA) Electronic Letter of Map Amendment (eLOMA) tool provides licensed land surveyors and professional engineers with a web-based system to submit a variety of LOMA requests as a faster alternative to the standard application process. The eLOMA tool offers users the advantage of swiftly generating an official FEMA determination document, […]
A storm system in the city of Suffolk, VA requires a structure replacement and pipe rehabilitation. Sounds like a typical day in the life of a stormwater engineer, right? However, there are a few extenuating circumstances that make this project unique. The upstream end of the storm pipe in need of rehabilitation can be […]
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 […]
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 […]
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 […]
The arrival of Artificial Intelligence for the masses in late 2022 opened a world of previously unimagined possibilities for anyone engaged in technical work. With a little perseverance and some natural language and logic skills, engineers now have problem-solving superpowers. Clearly, we’re not in Kansas anymore. Some have been quick to adapt, others not so […]
The Virginia Lakes and Watershed Association is a volunteer organization and its mission is to provide education on water resources in Virginia.
