000			01617nab a22002777a 4500
001			G98182
003			MX-TxCIM
005			20170719155510.0
008			121211b |||p||p||||||| |z||| |
022	0		_a0001-2351
040			_aMX-TxCIM
041	0		_aEn
100	1		_aAllred, B.
245	0	0	_aVariability of optimized parameter estimates based on observed record length
260			_c1991
520			_aThe variability in parameter estimates for a hydrologic model as a function of the number of years of data available for estimating the parameters was investigated. A 25-year record on Spavinaw Creek in Oklahoma and Arkansas was divided into 25 one-year, 12 two-year, and 5 five-year records. Each period was used for parameter estimation. Two objective functions, one based on absolute errors and one based on error sum of squares, were used. Mean parameter values exhibited greater than expected variability, and variances in estimated parameters did not decrease as expected as the number of years used for parameter estimation increased from one to five years. One year was found to dominate one of the estimated model parameters for any record length that included that particular year. Significant differences between parameter values based on the two objective functions were found only for one parameter based on one-year optimizations.
546			_aEnglish
593			_aCarelia Juarez
595			_aRPC
650	1	0	_aHydrology
650	1	0	_aModeling
650	1	0	_aParameters
700	1		_aHaan, C.T., _ecoaut.
773	0		_tTransactions of the ASAE _gv. 34, no. 6, p. 2421-2426
942			_cJA
999			_c30151 _d30151