On the Treatment of Evapotranspiration, Soil Moisture Accounting, and Aquifer Recharge in Monthly Water Balance Models

Water Resources Research - Tập 20 Số 8 - Trang 1137-1149 - 1984
William M. Alley

Tóm tắt

Several two‐ to six‐parameter regional water balance models are examined by using 50‐year records of monthly streamflow at 10 sites in New Jersey. These models include variants of the Thornthwaite‐Mather model, the Palmer model, and the more recent Thomas abcd model. Prediction errors are relatively similar among the models. However, simulated values of state variables such as soil moisture storage differ substantially among the models, and fitted parameter values for different models sometimes indicated an entirely different type of basin response to precipitation. Some problems in parameter identification are noted, including difficulties in identifying an appropriate time lag factor for the Thornthwaite‐Mather‐type model for basins with little groundwater storage, very high correlations between upper and lower storages in the Palmer‐type model, and large sensitivity of parameter a of the abcd model to bias in estimates of precipitation and potential evapotranspiration. Modifications to the threshold concept of the Thornthwaite‐Mather model were statistically valid for the six stations in northern New Jersey. The abcd model resulted in a simulated seasonal cycle of groundwater levels similar to fluctuations observed in nearby wells but with greater persistence. These results suggest that extreme caution should be used in attaching physical significance to model parameters and in using the state variables of the models in indices of drought and basin productivity.

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Tài liệu tham khảo

Beck J. V., 1977, Parameter Estimation in Engineering and Science

10.1016/0022-1694(83)90030-6

Conover W. J., 1980, Practical Nonparametric Statistics

10.1016/0022-1694(77)90066-X

Dunne T., 1978, Water in Environmental Planning

Durbin J., 1971, Testing for serial correlation in least squares regression, Biometrika, 59, 1

10.2307/2282437

10.1029/WR019i001p00269

10.1029/WR008i001p00058

Hoel P. G., 1971, Introduction to Statistical Theory

10.1016/0022-1694(79)90069-6

10.1029/WR018i001p00146

10.1029/WR019i005p01163

Leavesley G. H. R. W.Lichty B. M.Troutman L. G.Saindon Precipitation‐runoff modeling system: User's manual U.S. Geol. Surv. Water Resour. Invest. 83‐4238 1983.

Marin C. M. Parameter uncertainty in water resource planning Ph.D. dissertation Harvard Univ. Cambridge Mass. 1983.

Mather J. R., 1975, Estimation of areal average precipitation using different network densities and averaging techniques, Publ. Climatol. Lab. Climatol. Drexel Inst. Technol., 28, 1

10.1111/j.1752-1688.1981.tb01243.x

10.1029/WR014i002p00299

10.1016/0022-1694(83)90177-4

Palmer W. C. Meteorologic drought Res. Pap. U.S. Weather Bur. 45 58 1965.

10.1111/j.1365-2389.1950.tb00720.x

10.1093/comjnl/3.3.175

10.1016/0022-1694(79)90070-2

10.1029/WR016i002p00430

Thomas H. A. Improved methods for National Water Assessment reportcontract WR15249270U.S. Water Resour. Counc. Washington D. C. 1981.

Thomas H. A. C. M.Marin M. J.Brown M.B Fiering Methodology for water resource assessment report to U.S. Geological SurveyRep. NTIS 84‐124163Natl. Tech. Info. Serv. Springfield Va. 1983.

10.2307/210739

Thornthwaite C. W., 1955, The water balance, Publ. Climatol. Lab. Climatol. Drexel Inst. Technol., 8, 1

Thornthwaite C. W., 1957, Instructions and tables for computing potential evapotranspiration and the water balance, Publ. Climatol. Lab. Climatol. Drexel Inst. Technol., 10, 185

10.1029/TR036i003p00425

10.1016/0022-1694(83)90052-5

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Water Resources Research

Tập 20 Số 8

1137-1149

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