동결기 자유수면 지하수의 모관상승량을 고려한 DAWAST 모형

DAWAST Model Considering the Phreatic Evaporation in the Frozen Region

  • 김태철 (충남대학교 농과대학) ;
  • 박철동 (중국 내몽고자치구 찰란둔시 수리국)
  • 발행 : 2001.03.01

초록

The daily streamflow in the Yaluhe watershed located in the north-eastern part of China was simulated by DAWAST model and the water balance parameters of the model were calibrated by simplex method. Model verification tests were carried out. The range of root mean square error was 0.34∼1.50mm, that of percent error in volume was -16.9∼-62.0% and that of correlation coefficient was 0.727∼0.920. DAWAST model was revised to consider the phreatic evaporation from the ground water in the frozen soil by adjusting soil moisture content in the unsaturated layer at the end of the melting season. The results of estimation of the daily streamflow by the revised model were statistically improved, that is, the range of root mean square error was 0.31∼1.49mm, that of percent error in volume was -11.7∼-12.1%, and that of correlation coefficient was 0.810∼0.932. The accuracy of DAWAST model was improved and the applicability of DAWAST model was expanded to the frozen region.

키워드

참고문헌

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