SUMMARY ARCHIVES

•  Archive of all months
•  Last 12 months
• October 2009
• September 2009
• August 2009
• July 2009
• June 2009
• May 2009
• April 2009
• March 2009
• February 2009
• January 2009
• December 2008
• November 2008

USGS IN YOUR STATE

USGS Water Science Centers are located in each state.

Summary of April 2004 Monthly Hydrologic Conditions

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

The following pages are adapted for online release from a summary of hydrologic condions for the previous month.

April 2004

Precipitation was above normal at all three index stations. Newark reported 4.85 inches, which is 124 percent of normal. Atlantic City reported 4.71 inches, which is 136 percent of normal. Trenton reported 6.03 inches, which is 137 percent of normal.

Combined storage in the thirteen major water supply reservoirs as of April 30 was 79.0 billion gallons, which is 98 percent of capacity. The storage was 1.97 billion gallons more than one month ago and .321 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 the High Bridge and Trenton index stations and above normal at the Folsom index station. The monthly-mean discharge at South Branch Raritan River near High Bridge was 177 ft³/s, 84.3 percent of normal. The monthly-mean discharge of the Great Egg Harbor River at Folsom was 151 ft³/s, 125 percent of normal. The observed monthly mean discharge of the Delaware River at Trenton was 15,930 ft³/s, 73.7 percent of normal. The observed daily mean discharge of the Delaware River at Trenton on April 30 was 16,900 ft³/s.

Groundwater levels, as measured in water-table observation wells, were above normal at all three index wells. Levels increased from last month, and were higher than one year ago.

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