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Summary of November 2005 Monthly Hydrologic Conditions

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

November 2005

Precipitation was below normal at all three index stations. Newark reported 3.74 inches, which is 96.4 percent of normal. Atlantic City reported 2.80 inches, which is 85.9 percent of normal. Trenton reported 2.41 inches, which is 72.2 percent of normal. Total precipitation over the past 12 months was: 49.17 inches at Newark, which is 6.93 inches above normal; 50.05 inches at Atlantic City, which is 12.60 inches above normal; and 55.24 inches at Trenton, which is 17.27 inches above normal.

Combined storage in the thirteen major water supply reservoirs as of November 30 was 72.9 billion gallons, (90.6 percent of capacity), which is greater than the average November contents for the reference period 1961-1990. The storage was 2.74 billion gallons more than one month ago and 3.34 billion gallons less 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 slightly below normal at the South Branch Raritan River near High Bridge, normal at the Great Egg Harbor River Folsom, and above normal at the Delaware River at Trenton. The monthly-mean discharge at High Bridge was 119 ft³/s, 97.5 percent of normal. The monthly-mean discharge of at Folsom was 77.4 ft³/s, 100 percent of normal. The monthly mean discharge of at Trenton was 12,360 ft³/s, 112 percent of normal. The observed daily mean discharge of the Delaware River at Trenton on November 30 was 18,600 ft³/s.

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

Water quality parameters collected from the Delaware River at Trenton were within recorded historical monthly extremes. Water temperature ranged from 2.9 to 12.4 degrees Celsius. Dissolved oxygen ranged from 10.0 to 14.8 milligrams per liter. Specific conductance ranged from 137 to 199 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