This concludes the 2020 Washington Metropolitan Area (WMA) drought exercise. A report describing exercise assumptions, activities, and tools will be prepared and made available on ICPRB's website in the coming weeks.
Thank you for your help in maintaining the reliability of the regional water supply system! Special thanks to WSSC Water staff for providing a tour of the Little Seneca Dam and to the Black Hill Regional Park for posting signs prior to the release.
We hope that the webinar on Forecast Informed Reservoir Operations by Hazen and Sawyer was informative.
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RECENT CONDITIONS – ACTUAL
Potomac River Flows:
Little Falls gage flow 2020-11-17: 6722 MGD (10400 cfs)
Little Falls gage flow 2020-11-18: 5584 MGD (est., based on recently available real time data) (8640 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2020-11-17: 5552 MGD (8590 cfs)
Point of Rocks flow 2020-11-18: 4518 MGD (est., based on recently available real time data) (6990 cfs)
Today's estimated production* (2020-11-18):
FW estimated production: 150 MGD
WSSC Water estimated production: 146 MGD
Washington Aqueduct estimated production: 114 MGD
Total estimated production: 410 MGD
*Based on CO-OP daily demand forecasting models. FW includes the LW purchase and excludes Falls Church. Washington Aqueduct includes Falls Church
Tomorrow's estimated production* (2020-11-19):
FW estimated production:153 MGD
WSSC estimated production:146 MGD
Washington Aqueduct estimated production:116 MGD
Total estimated production:415 MGD
*Based on CO-OP daily demand forecasting models. FW includes the LW purchase and excludes Falls Church. Washington Aqueduct includes Falls Church
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Recommended (SIMULATED) operations for this afternoon (2020-11-18):
Fairfax Water:
Maintain the (SIMULATED) load shift of 24 MGD off the Corbalis plant (Potomac) and onto the Griffith plant (Occoquan). Keep Potomac withdrawal rate as steady as possible.
WSSC Water:
Keep Potomac withdrawal rate (SIMULATED) as steady as possible.
Little Seneca (release date, time, amount in MGD):
Maintain a 22 MGD (SIMULATED) water supply release from Little Seneca Reservoir.
Washington Aqueduct:
Maintain (SIMULATED) withdrawals at Little Falls of 150 MGD. Great Falls per operational preference.
Loudoun Water:
QPR, obs = 473 MGD (732 cfs) (SIMULATED)
QPR, WS = 50 MGD (SIMULATED)
QPR = 423 MGD (SIMULATED))
North Branch Reservoirs Summary:
Maintain (SIMULATED) water supply release with a Luke target of 152 cfs. This is equivalent to 98 MGD.