USGS Water-Year Summary 2018
07144550 ARKANSAS RIVER AT DERBY, KS
LOCATION - Lat 37°32'39", long 97°16'31" referenced to North American Datum of 1927, in SE 1/4 SW 1/4 NW 1/4 sec.12, T.29 S., R.1 E., Sedgwick County, KS, Hydrologic Unit 11030013, on left bank at downstream side of county highway bridge at west edge of Derby, 0.9 mi downstream from mouth of bypass channel, and at mile 749.5.
DRAINAGE AREA - 40,830 mi² of which 7,263 mi² probably is noncontributing.
PERIOD OF RECORD - October 1968 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,229.95 ft above NGVD of 1929 (city of Wichita bench mark).