【摘要】 利用20世纪70年代的水文气象资料、地形和土地覆被资料以及双源蒸散发能力计算模型计算了老哈河流域甸子水文站以上集水区内30″栅格单元的逐日蒸散发能力,将其与集水区内蒸发皿资料的回归关系作为混合产流模型的输入来验证双源蒸散发能力计算模型在半干旱区的适用性.结果表明:由双源蒸散发能力计算模型计算的蒸散发能力与当地的蒸发皿资料在时间上具有较好的相似性和一致性,并且该蒸散发能力可以取代蒸发皿资料作为混合产流模型的输入进行径流模拟,且两者的模拟精度相当.更多还原

【Abstract】 Based on the hydrometeorological data from the 1970s and topographical and land cover data with a spatial resolution of 30″×30″,the daily potential evapotranspiration of the Laohahe watershed upstream from the Dianzi hydrological station was calculated using the two-source potential evapotranspiration model.In order to verify the applicability of the two-source potential evapotranspiration model in semiarid areas,the regression relationship between the calculated potential evapotranspiration and measured with an evaporation pan was established and regarded as the input of the hybrid runoff generation model. The results indicate that good temporal similarity and consistence occur between the potential evapotranspiration calculated with the two-source potential model and that calculated with the field evaporation pan.The calculated potential evapotranspiration can replace the pan evaporation as the input of the hybrid model to simulate daily runoff,and the simulation precisions of the two approaches is close.更多还原