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• November 2008

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Summary of November 2008 Monthly Hydrologic Conditions

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

November 2008

Precipitation was above normal at The Atlantic City and Trenton index stations, and below normal at the Newark index station. Newark reported 3.07 inches, which is 79.1 percent of normal.  Atlantic City reported 5.90 inches, which is 181 percent of normal.  Trenton reported 3.42 inches, which is 102 percent of normal. Total precipitation over the past 12 months was: 47.73 inches at Newark, which is 1.48 inches above normal; 46.5 inches at Atlantic City, which is 5.91 inches above normal; and 44.38 inches at Trenton, which is 2.99 inches above normal.

Combined storage in the thirteen major water supply reservoirs as of November 30 was 62.5 billion gallons (77.7 percent of capacity), which is higher than the average November contents for the reference period 1961-1990.  The storage was 3.07 billion gallons more than one month ago and 11.3 billion gallons more 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, Charlottesburg Reservoir, Echo Lake, Wanaque Reservoir and Spruce Run Reservoir.         

Streamflow was below normal at all three index stations. The monthly-mean discharge at South Branch Raritan River near High Bridge was 84.0 ft3/s, 68.8 percent of normal.  The monthly-mean discharge of the Great Egg Harbor River at Folsom was 62.9 ft3/s, 81.5 percent of normal.  The monthly mean discharge of the Delaware River at Trenton was 10130 ft3/s, 92.0 percent of normal. The observed daily mean discharge of the Delaware River at Trenton on November 30 was 7930 ft3/s. 

Groundwater levels, as measured in water-table observation wells for the month of November, were above normal at the Readington School and the Morrell index wells. The Groundwater levels were below normal at the Vocational School index station. Levels increased from last month. Levels were lower than one year ago at the Readington School and Vocational School index wells, and were higher than one year ago at the Morrell index well.

Water quality parameters collected from the Delaware River at Trenton were within recorded historical monthly extremes. Water temperature ranged from 2.9 to 12.2 degrees Celsius. Dissolved oxygen ranged from 9.9 to 13.7 milligrams per liter. Specific conductance ranged from 139 to 198 microsiemens per centimeter at 25°C.

All of the files listed below are in Portable Document Format (PDF) which can be viewed/printed with the Adobe Acrobat® Reader, freely available for most computer platforms.

• Combined Storage in the 13 Major Water Supply Reservoirs
• Monthly precipitation at three selected sites
• Groundwater levels in selected Water-table observation wells
• Streamflow at selected sites
• Water quality for the Delaware River at Trenton