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Water-Year Summary for Site 16848100

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
16848100 Almagosa River near Agat, Guam
LOCATION - Lat 13°20'48.2", long -144°14'3.8" referenced to North American Datum of 1983, Guam County, GM, Hydrologic Unit 22010000, 2.0 mi northeast of Mt Jumullong Manglo, 3.5 mi southeast of Agat-Santa Rita School, and 1.0 mi southwest of Fena Spillway.
DRAINAGE AREA - 1.32 mi². from automated delineation using 5-meter digital elevation model, using UTM Zone 55N projection, NAD83 HARN horizontal datum. The 5-m digital elevation model was derived from a digital terrain model, created by Joint Airborne Lidar Bathymetry Technical Center of Expertise, dated May 2007.
REVISIONS HISTORY - WDR HI-75-1: Drainage area. WDR HI-76-1: 1972(P), 1973(M), 1974-75(P). WDR HI-10-1: Drainage Area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - April 1972 to March 1992, January 1993 to April 1994, March 1997 to current year. October 1991 to September 2005, unpublished records are in the files of the U.S. Geological Survey.
GAGE - Water-stage recorder and bedrock control. Elevation of gage is 155 ft, from topographic map.
REMARKS - Up to 3.9 ft³/s diverted upstream for domestic use. Pumping records indicated the Navy has not diverted water at the Springs since 2011.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 6,330 ft³/s, July 5, 2002, gage height, 10.80 ft, from outside floodmarks and from rating curve extended above 58 ft³/s on basis of slope-area measurement at gage height 7.32 ft and critical-depth measurement at gage height 10.80 ft. Minimum discharge: 0.05 ft³/s, June 12, 1993.