DROUGHT EXERCISE - Afternoon Potomac flow and demand update (Saturday 09/17/2011)
There has been no significant rainfall in the basin over the past 24 hours. The National Weather Service quantitative precipitation forecasts indicate that there will be accumulations of up to 0.75 inches over much of the basin during the next five days.
(SIMULATED) Daily Flows:
Little Falls gage flow 09/16/15: 310 MGD (470 cfs)
Little Falls gage flow 09/17/15: 210 MGD (est., based on most recently available real time data) (327 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 09/16/15: 570 MGD (880 cfs)
Point of Rocks flow 09/17/15: 510 MGD (est., based on recently available real time data) (800 cfs)
(ACTUAL) Today's estimated demand (09/17/11) P.M.:
WSSC P.M. estimated demand: 175 MGD
FW P.M. estimated demand: 160 MGD
Aqueduct P.M. estimated demand: 140 MGD
Total P.M. estimated demand: 475 MGD
(ACTUAL) Tomorrow's estimated demand (09/18/11):
WSSC estimated demand: 175 MGD
FW estimated demand: 170 MGD
Aqueduct estimated demand: 132 MGD
Total estimated demand: 477 MGD
SIMULATED operations for today (09/17/15):
Fairfax Water (SIMULATED):
Priority 1: keep Occoquan withdrawals as close to 90 MGD as possible.
Priority 2: maintain Potomac withdrawal as steady as possible.
WSSC (SIMULATED):
Priority 1: keep Patuxent withdrawals as close to 30 MGD as possible.
Priority 2: keep Potomac withdrawals as steady as possible.
Seneca (SIMULATED release date, time, amount in MGD):
No release from Little Seneca Reservoir is scheduled as of this afternoon.
Aqueduct (SIMULATED):
Little Falls: implement an additional load shift by adding the 50 MGD pump; continue operating 100 MGD pump (resulting in an observed 185 MGD withdrawal).
Great Falls: per operational preference if additional demand needs to be met.
North Branch Reservoirs (SIMULATED):
There are currently no releases from the North Branch reservoirs.