New Jersey Water Science Center
Summary of January 2014 Monthly Hydrologic Conditions
Compiled in cooperation with the New Jersey Department of Environmental Protection
Precipitation was above normal at the Trenton and Atlantic City index stations, and below normal for the Newark index station, for the reference period 1981-2010. Newark reported 2.78 inches, which is 78.53 percent of normal. Atlantic City reported 3.25 inches, which is 100.93 percent of normal. Trenton reported 3.27 inches, which is 103.48 percent of normal. Total precipitation over the past 12 months was: 43.23 inches at Newark, which is 3.02 inches below normal; 47.07 inches at Atlantic City, which is 5.32 inches above normal; and 43.70 inches at Trenton, which is 2.74 inches below normal.
Combined storage in the thirteen major water supply reservoirs as of January 31 was 60.659 billion gallons (75.0 percent of capacity), which is more than the average January contents for the reference period 1961-1990. The storage was 5.061 billion gallons more than one month ago and 12.197 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, Charlotteburg Reservoir, Echo Lake, Wanaque Reservoir and Spruce Run Reservoir.
Streamflow was above the long-term monthly-mean for the reference period 1981-2010 at the Great Egg Harbor River at Folsom and Delaware River at Trenton index stations, but below the long-term monthly-mean at the South Branch Raritan River at High Bridge index Station. The monthly-mean discharge at South Branch Raritan River near High Bridge was 128 ft3/s, 84.8 percent of the long-term mean. The monthly-mean discharge of the Great Egg Harbor River at Folsom was 113 ft3/s, 114.7 percent of the long-term mean. The monthly mean discharge of the Delaware River at Trenton was 18,960 ft3/s, 141.00 percent of the long-term mean. The observed daily mean discharge of the Delaware River at Trenton on January 31 was estimated due to ice build-up at 8,500 ft3/s.
Groundwater levels, as measured in water-table observation wells for the month of January, were above normal at all three index wells. Levels decreased from last month at the Readington School 11 and Morrell 1 index well, and increased from last month at the Vocational School 2 index well. Levels were lower than one year ago at the Morrell 1 and Vocational School 2 index well, but were higher than one year ago at the Readington School 11 index well.
Water-quality parameters collected from the Delaware River at Trenton were within the range of historical monthly values. Water temperature ranged from 0.1 to 2.8 degrees Celsius. Dissolved oxygen ranged from 12.4 to 13.8 milligrams per liter. Specific conductance ranged from 141 to 363 microsiemens per centimeter at 25°C.
Note: The preceding data is preliminary and subject to revision.
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.