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Stormwater best management practices (BMPs) designed as landscape amenities in a highly public setting require regular ongoing maintenance to remain effective and attractive. Thoughtful design features make it easier to maintain the landscaped BMPs to keep them beautiful. This highly public space also has underground manufactured treatment devices (MTDs) to provide water quality treatment. The […]
Wastewater reuse benefit water shortage and a variety purposes but effect to water quality of receiving body is a concern, especially when effluent of sewage treatment plant is introduced to source of drinking water facility. Indirect potable reclamation characterized as mixing effluent into either surface or groundwater source, subsequently flowing into drinking water treatment plant, […]
The design storm is a fundamental parameter for risk and vulnerability assessment of urban infrastructure. It is traditionally determined from historic observations. There is however growing recognition that design storm calculations based on historical data may misrepresent flood risk due to future climate change. To determine if and when the design storm calculation should consider […]
Natural and nature-based features are a pillar of the City of Virginia Beach’s recently completed “Sea Level Wise” Adaptation Strategy which is now adopted into the City’s Comprehensive Plan. This project involves the design and permitting of a network of marsh terraces within Bonney Cove, located in Back Bay in southern Virginia Beach. This is […]
Over the last five years, the City of Virginia Beach has completed the development of the hydrologic and hydraulic models for all 15 drainage basins throughout the City’s nearly 500 square miles. Each of the 15 drainage basins model has been calibrated and validated against data observed during historical storm events that caused flooding in […]
This presentation will discuss recent experiences in navigating field changes, design changes, and permit modifications efficiently and effectively. Lessons learned will be shared for projects that required revisions to their approved Stormwater Management Plan due to conflicts with varying field conditions or due to the reallocation of project funding. These case studies will address the […]
The High Definition Stream Survey (HDSS) approach to waterway assessments was created to rapidly gather continuous geo-referenced data in a single pass for any size of stream or river. HDSS integrates GPS, video, depth, side scan imagery, velocity, and water quality information to enable a much more thorough understanding of the current and potential factors […]
Whenever someone asks us what the stormwater management requirements will be on their upcoming project, our immediate response is “Where’s the project and what’s the total land disturbance?”. So, you might be thinking, “What exactly is so disturbing?”. Well, while the amount of land that’s disturbed during a project is a critical component to control […]
The City of Roanoke’s Central Business District (CBD) is an economic hub, and its long-term sustainability and resiliency is vital to the Commonwealth, however, the CBD is subject to flash flooding during intense rainfall since it sits atop the confluence of two major streams – Trout Run and Lick Run. These streams are conveyed under […]
The Clean Air Act Amendment in 1990 has been successful in limiting sulfate atmospheric deposition, but sulfate stream concentrations remain high, particularly in unglaciated regions. There are several anthropogenic sources of stream sulfate, including building materials, road salt, septic systems, and agriculture. Beyond acidification, sulfate fluxes have ecological consequences for nutrient cycling through mobilizing phosphate. […]
The Virginia Lakes and Watershed Association is a volunteer organization and its mission is to provide education on water resources in Virginia.
