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American Society of Civil Engineers (ASCE)-Environmental and Water Resources Institute’s (EWRI) Total Maximum Daily Load (TMDL) Analysis and Modeling Task Committee is releasing a new Manual of Practice (MOP) No. 150 on TMDL Development and Implementation: Models, Methods, and Resources in February/March 2022. The MOP was written by members of the Task Committee, edited by […]
The Total Maximum Daily Load (TMDL) Analysis and Modeling Task Committee of the American Society of Civil Engineers (ASCE) Environmental and Water Resources Institute (EWRI) was formed to address concerns over the current practices of analysis and modeling in TMDL development and implementation in terms of analysis technique and model selection, data requirement, calibration, validation, […]
The Commonwealth of Virginia’s November 2010 Chesapeake Bay Watershed Implementation Plan included its regulatory plan to ensure MS4s implemented necessary pollutant reductions. This regulatory plan details the back-end dominated pollutant reduction MS4 permitting strategy that DEQ selected to employ over three five-year VPDES permit cycles, beginning in 2013. On March 12, 2020, Virginia Governor Ralph […]
There are numerous lakes and ponds located throughout Virginia which pre-date present day stormwater design standards. In some cases, these facilities offer opportunities to assist municipalities in meeting Chesapeake Bay and Local TMDL requirements and improving water quality throughout the State. Loudoun County has identified many retrofit opportunities on publicly-owned land, but the number of […]
The Chapter 12, “Modeling for Total Maximum Daily Load (TMDL) Implementation,” in the ASCE Manual of Practice 150, “TMDL Development and Implementation: Models, Methods, and Resources,” written by the ASCE-EWRI TMDL Analysis and Modeling Task Committee, discusses state-of-the-practice on uses of models in TMDL implementation planning, and reviewed six watershed models found in implementation planning […]
The Virginia Lakes and Watershed Association is a volunteer organization and its mission is to provide education on water resources in Virginia.
