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Urban stormwater management represents one of the most pervasive, significant environmental issues in the U.S. Due to shifts in the frequency and intensity of rainfall events, increasing economic development, and urbanization, cities and communities are faced with growing challenges around flood risk management and protection of property, public health, and safety. With advancements in technology, […]
Recent history has demonstrated how quickly and unexpectedly conditions and priorities can change, which can quickly diminish the value of a conventional stormwater master plan. New and increasingly accessible approaches including 2D modeling, dynamic dashboards, and interactive visualizations provide increased utility and longevity of master planning efforts, better addressing stormwater challenges and communicating those solutions […]
Accumulated sediments located in waterways require comprehensive characterization prior to removal to facilitate the selection of suitable disposal sites and minimize impacts to project schedule and budget. Sediments often contain a variety of environmental contaminants above regulated concentrations. The deposition process can concentrate heavy contaminants such as metals and create an anerobic environment that can […]
Despite increasing numbers of agricultural best management practices (BMPs) on the landscape and billions of dollars spent on BMP programs, stream health continues to decline in Virginia due to agricultural nonpoint-source pollution. The efficacy of BMPs for restoring stream health is potentially enhanced or constrained by conditions in the stream and watershed, as well as […]
Historical mining operations have left the country with abandoned mine lands and other nonpoint sources of pollution that produce Acid Mine Drainage (AMD). When subsurface sulfide materials are exposed to oxygen and water, a sulfuric acid is produced that is capable of dissolving heavy metals and mobilizing them into solution. This presentation will discuss analysis […]
High water quality is essential for aquatic life and human beings. The microbial communities are the major component of the river ecosystem. However, the microbial communities of the river water ecosystems are susceptible to changing climatic and other environmental factors, for instance, water pH, temperature, nutrient contents, and concentrations of metals and minerals. So, there […]
As part of the City of Chesapeake’s Elbow Road improvement efforts, GKY and Associates, Inc. was tasked with creating an existing condition Stormwater Management Model (SWMM). The primary goal of this modeling effort was to help the City and its roadway designers better understand and accommodate drainage in the highly undeveloped, low-lying, and flat watershed. […]
A resilience plan of the City of Chesapeake, Virginia, was completed in December 2023 to protect the city’s watersheds from current and future flooding expected from climate change and sea level rise. The plan was prepared by Timmons Group for the city and was supported by a grant from Virginia Department of Conservation and Recreation’s […]
The 2023 Infrastructure Report Card prepared by the American Society of Civil Engineers reported that national stormwater infrastructure earned a grade of “D”. The increasing need for stormwater retrofits and new stormwater infrastructure to combat more intense rainfall due to climate change is complicated by the fact that most of the high priority projects are […]
A stormwater “Resilience Plan” identifies specific drainage improvement projects that could be constructed to improve flood resiliency – specifically for extreme storm events. Resiliency planning addresses how fast and efficiently a system recovers after a major event. Here, resiliency specifically refers to the ability of streets and land parcels to recover from flooding. Improving resiliency […]
The Virginia Lakes and Watershed Association is a volunteer organization and its mission is to provide education on water resources in Virginia.
