【摘要】 针对西北内陆高寒山区的水文、气象特点,本文以网格为最小单元将流域离散,通过分析同一高程网格坡向不同及其对到达地面太阳短波辐射通量的影响,提出地形要素差异导致地面冷热源再分布,调控融雪出流量,继而将坡向判断也作为系统重要输入项之一嵌入到模型计算中,最后通过在每一栅格单元上采用融雪型新安江产流模型与SCS汇流模型,构建整个流域的分布式水文模型。该模型在甘肃省石羊河流域进行模拟研究,其结果令人满意。更多还原

【Abstract】 In view of the characters of hydrologic and meteorologic in cold mountain area northwest inland,this paper disperse the watershed by grid.Through analyse the difference aspect in equal elevation grid and the effect of solar shortwave radiation which receive by ground surfaces.Indicated that the discrepancy of terrain essential leads heat-cold source redistributed in ground surfaces and affect snowmelt runoff.So take the aspect estimation as the most import inputs into the model calculating.Through apply the snowmelt Xinanjiang model and SCS confluence model within each grid,establish the distributed hydrological model in entire watershed.The model simulated in Shiyang river basin in Gansu province,the result are promising.更多还原