Monitoring Reports

During periods of drought, the Cooperative Water Supply Operations on the Potomac (CO-OP) helps manage the Washington metropolitan area water supply system by coordinating withdrawals from the Potomac River and off-river reservoirs and recommending releases from upstream reservoirs when forecasted flow in the river is not sufficient to meet expected needs. These needs include water demands and an environmental flow-by of 100 million gallons per day (MGD) on the Potomac River at Little Falls dam near Washington, D.C.

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DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Monday 10/10/2020) - DROUGHT EXERCISE COOP Mon 10/10/2016 1:46 PM DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Monday 10/10/2020) - DROUGHT EXERCISE There ar

DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Monday 10/10/2020) - DROUGHT EXERCISE

There are no changes in requested SIMULATED operations this afternoon.

ACTUAL - Basin and system conditions:

Yesterday's basin-wide average precipitation (above Little Falls):
0.033 inches
(based on CO-OP's Low Flow Forecast System analysis of MARFC gridded multisensor precipitation estimates)

DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Sunday 10/09/2020) - DROUGHT EXERCISE

There are no changes in requested SIMULATED operations this afternoon.

ACTUAL - Basin and system conditions:

Yesterday's basin-wide average precipitation (above Little Falls):
0.689 inches
(based on CO-OP's Low Flow Forecast System analysis of MARFC gridded quantitative precipitation estimates)

DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Saturday 10/08/2020) - DROUGHT EXERCISE

There are no changes in requested SIMULATED operations this afternoon.

ACTUAL - Basin and system conditions:

Yesterday's basin-wide average precipitation (above Little Falls):
0.052 inches
(based on CO-OP's Low Flow Forecast System analysis of MARFC gridded quantitative precipitation estimates)

DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Friday 10/07/2020) - DROUGHT EXERCISE

There are no changes in requested SIMULATED operations this afternoon.

ACTUAL - Basin and system conditions:

Yesterday's basin-wide average precipitation (above Little Falls):
0 inches
(based on CO-OP's Low Flow Forecast System analysis of MARFC gridded quantitative precipitation estimates)

DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Wednesday 10/05/2020) - DROUGHT EXERCISE

DROUGHT EXERCISE - Afternoon simulated Potomac flow and demand update (Wednesday 10/05/2020) - DROUGHT EXERCISE

Yesterday's basin-wide average precipitation (above Little Falls):
0 inches
(based on CO-OP's Low Flow Forecast System analysis of MARFC gridded quantitative precipitation estimates)

2019 Annual WMA Drought Exercise, Morning Potomac flow and demand update (Thursday 2019-11-21)

This is Day 2 of the annual Washington metropolitan area (WMA) drought exercise. The exercise scenario appears below. During the exercise, WMA water suppliers are sending data on withdrawals and reservoir levels twice daily, and ICPRB CO-OP staff are communicating via phone with supplier operations staff regarding requested operational changes.

EXERCISE SCENARIO

2019 Annual WMA Drought Exercise, Afternoon Potomac flow and demand update (Wednesday 2019-11-20)

NOTE: In our twice daily reports for the 2019 exercise we are reporting ACTUAL basin flows and system withdrawals, and SIMULATED recommended operations

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ACTUAL CONDITIONS REPORTED BELOW

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Daily Flows:

Little Falls gage flow 2019-11-19: 1790 MGD (2770 cfs)

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