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Water-Year Summary for Site 02471019

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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
72137 Discharge,tide fltrd(Mean)  

Water year 2019: 2019-10-01 to 2020-09-30
 

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USGS Water-Year Summary 2019
02471019 TENSAW RIVER NEAR MT VERNON, AL
LOCATION - Lat 31°04'01", long 87°57'31" referenced to North American Datum of 1927, Mobile County, AL, Hydrologic Unit 03160204, 2.0 mi downstream of the Old Fort Stoddard Boat Landing in Mt. Vernon, and 1/4 mi downstream of the Mobile River / Tensaw River split.
DRAINAGE AREA - Approximately 42,900 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 2003 to current Year.
GAGE - Non-recording gage. Discharge is computed using a regression equation based on the discharge at station 02470629 - Mobile River at river mile 31.0 at Bucks.
REMARKS - Estimated values: December 31, 2016, January 1-4, 7-10, 2017. Record considered poor. Flow at this site is affected by astronomical tides. Daily mean discharge was computed using the Godin low-pass filter to remove tidal effects from instantaneous values. By convention, the U.S. Geological Survey has established ebb (streamward) flows as positive flows, and flood (landward) flows as negative flows. Astronomical tides cause significant cycles of approximately 24.84 hours at this site. Because a different portion of the 24.84 hours tidal cycle is averaged in successive daily (24-hour) computations, a systematic secondary oscillation, unrelated to basin hydrology and having a period of about 2 weeks many be apparent in daily data published data prior to October 1, 2010.
EXTREMES FOR PERIOD OF RECORD - Minimum instantaneous discharge -13,200 ft³/s, July 23, 2008.