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SUMMARY ARCHIVES

Summary of November 2015 Monthly Hydrologic Conditions

Compiled in cooperation with the New Jersey Department of Environmental Protection
Provisional assessment of hydrologic conditions in New Jersey

November 2015

Map of New Jersey showing sites where hydrologic conditions are reported.

Precipitation was below normal at the Newark and Trenton index stations and above normal at the Atlantic City index station for the reference period 1981-2010. Newark reported 1.30 inches, which is 35.62 percent of normal.  Atlantic City reported 3.66 inches, which is 111.93 percent of normal.  Trenton reported 1.96 inches, which is 59.21 percent of normal. Total precipitation over the past 12 months was: 42.42 inches at Newark, which is 3.83 inches below normal; 50.05 inches at Atlantic City, which is 8.30 inches above normal; and 41.77 inches at Trenton, which is 4.67 inches below normal.

Combined storage in the thirteen major water supply reservoirs as of November 30 was 47.870 billion gallons (59.2 percent of capacity), which is less than the average November contents for the reference period 1961-1990.  The storage was 1.937 billion gallons greater than one month ago and 2.069 billion gallons greater than one year ago.  The thirteen major water supply reservoirs are as follows: Lake Tappan, Woodcliff Lake, Oradell Reservoir, DeForest Lake, Splitrock Reservoir, Boonton Reservoir, Canistear Reservoir, Oak Ridge Reservoir, Clinton Reservoir, Charlotteburg Reservoir, Echo Lake, Wanaque Reservoir and Spruce Run Reservoir.

Streamflow was below the long-term monthly-mean for the reference period 1981-2010 at all three index stations. The monthly-mean discharge at South Branch Raritan River near High Bridge was 52.3 ft3/s, 47.5 percent of the long-term mean.  The monthly-mean discharge of the Great Egg Harbor River at Folsom was 55.3 ft3/s, 77.1 percent of the long-term mean.  The monthly mean discharge of the Delaware River at Trenton was 8,351 ft3/s, 74.6 percent of the long-term mean. The observed daily mean discharge of the Delaware River at Trenton on November 30 was 6,070 ft3/s.

Groundwater levels, as measured in water-table observation wells for the month of November, were below normal at the Readington School 11 and Morrell 1 index wells, and above normal at the Vocational School 2 index well. Levels decreased from last month at the Readington School 11 and Vocational School 2 index wells, and increased from last month at the Morrel 1index well. Levels were lower than one year ago at all three index wells.

Water-quality parameters collected from the Delaware River at Trenton were within the range of historical monthly values. Water temperature ranged from 5.9 to 13.9 degrees Celsius. Dissolved oxygen ranged from 9.9 to 12.8 milligrams per liter. Specific conductance ranged from 146 to 233 microsiemens per centimeter at 25°C.

Note: The preceding data is preliminary and subject to revision.


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