Wednesday, January 18, 2017

DRBC lifts drought watch, urges efficient water use

Delaware River winter view - DRBC photo taken in 2000

The following is taken from a DRBC news release:


The Delaware River Basin Commission (DRBC) today announced the termination of its drought management special permit in effect since Nov. 23, 2016, when the basin was placed in a drought watch.

"Due to recent precipitation and snow melt, combined storage in three large upper basin reservoirs has achieved and sustained a sufficient level for five consecutive days to result in automatic termination of the basinwide drought watch," said DRBC Executive Director Steve Tambini.

"Although upper basin reservoir storage has rebounded in recent weeks automatically ending the drought watch operations, other indicators such as groundwater levels, stream flows, precipitation, soil moisture, and local reservoir storage have not all recovered," said Tambini. "As a result, various state-issued drought watches and warnings based on those indicators remain in effect across most of the basin."

"DRBC continues to urge all water users to maximize water efficiency wherever possible and to fully cooperate with requests by the basin states to curb water use where drought watches and warnings have been issued based on local conditions," added Tambini. "The importance of a coordinated response by all water users cannot be overstated."

The DRBC’s primary drought management objective, which complements the basin states’ drought response efforts, is to provide for conservation of regional reservoir storage for purposes of water supply and flow augmentation in the Delaware River and salinity control in the Delaware Estuary (i.e., the tidal river and bay). 

The upper basin reservoirs which determine DRBC drought stages are located in the Catskill Mountains at the headwaters of the Delaware River in New York State. These three New York City reservoirs provide about half of the city’s water supply and support a minimum flow target in the Delaware River at Montague, N.J. established by the U.S. Supreme Court Decree of 1954. Storage, releases, diversions, and flow targets in the DRBC drought management plan are determined in advance and must have the unanimous concurrence of the parties to the decree, which include the four basin states and New York City.

Combined storage in the three upper basin reservoirs had been as low as 39.3% of capacity in late November 2016. The reservoirs are currently at about 58% of capacity, which is approximately 70 billion gallons below normal for this time of the year.

By transitioning out of the drought watch stage, out-of-basin diversions to New York City and portions of New Jersey established by the decree will return to normal levels. In addition, the Delaware River flow objective at Montague and a second flow objective at Trenton, N.J. will also return to the normal targets of 1,750 cubic feet per second (cfs) and 3,000 cfs, respectively.


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