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USGS Water-Year Summary 2024
08194500 Nueces River near Tilden, TX
LOCATION - Lat 28°18'31", long 98°33'25" referenced to North American Datum of 1927, McMullen County, TX, Hydrologic Unit 12110105, on right bank at downstream side of bridge on State Highway 16, 1.8 mi upstream from Kings Branch, 10.5 mi south of Tilden, and at mile 135.4.
DRAINAGE AREA - 8,093 mi².
REVISIONS HISTORY - WSP 1512: 1947. WSP 1732: 1951(M). WDR TX-83-3: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Nov. 1942 to current year.
PERIOD OF RECORD, Water-Quality.--
CHEMICAL DATA: Apr. 1967 to May 1968, Dec. 1997 to Aug. 1999, Dec. 2001 to Jan. 2010.
BIOCHEMICAL DATA: Apr. 1967 to May 1968, Dec. 1997 to Aug. 1999, Dec. 2001 to Jan. 2010.
PESTICIDE DATA: Dec. 1997 to Aug. 1999. Dec. 2001 to Jan. 2010.
RADIOCHEMICAL DATA: Dec. 1998 to Aug. 1999. Dec. 2001 to Jan. 2010.
GAGE - Water-stage recorder. Datum of gage is 183.102 ft above NAVD88. Satellite telemeter at station.
REMARKS - Since Mar. 1948, at least 10% of contributing drainage area has been regulated. Part of the flow of the Nueces River and its headwater tributaries enters the Edwards and associated limestones in the Balcones Fault Zone that crosses the basin between Nueces River at Laguna (station 08190000) and Nueces River below Uvalde (station 08192000). Some loss of flow into various permeable formations occurs downstream from the Balcones Fault Zone. There are many small diversions above station for irrigation. No flow at times. Some records listed in the "Period of Record" for surface water and water quality may not be available electronically.
EXTREMES OUTSIDE PERIOD OF RECORD - Floods in June 1935 reached a stage of 23.7 ft and in July 1942 about 22 ft, from information by local residents. Maximum stage since about 1902, that of Sept. 24, 1967.
EXTREMES FOR PERIOD PRIOR TO REGULATION - WATER YEARS 1943-1948: Maximum discharge 70,000 ft³/s, Oct. 11, 1946 (gage height 26.46 ft), from rating curve extended above 46,400 ft³/s; no flow at times.
AVERAGE DISCHARGE FOR PERIOD PRIOR TO REGULATION - 6 years (water years 1943-48), 510 ft³/s (369,500 acre-ft/yr).
WATER-QUALITY RECORDS
PERIOD OF RECORD - CHEMICAL DATA: Dec. 1997 to Jan. 2010. (discontinued).
BIOCHEMICAL DATA: Dec. 1997 to Jan. 2010. (discontinued).
PESTICIDE DATA: Dec. 1997 to Jan. 2010. (discontinued).
REMARKS - On Dec. 9, 2008, a water-quality sample was not collected on a scheduled visit due to unfavorable flow conditions. Stream discharge was estimated to be 0.09 cubic feet per second.
On Feb. 12, 2009, a water-quality sample was not collected on a scheduled visit due to unfavorable flow conditions. Stream discharge was estimated to be 0.06 cubic feet per second.
On June 10, 2009, a water-quality sample was not collected on a scheduled visit due to unfavorable flow conditions. Stream conditions were dry.
On Aug. 19, 2009, a water-quality sample was not collected on a scheduled visit due to unfavorable flow conditions. Stream conditions were dry.
