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径流模拟是水文过程模拟的重要内容。天山南坡山区流域在春夏季主要以冰雪融水为主要径流补给,融雪径流对区域水文和水资源具有重要的现实意义。受到资料稀缺的影响,山区流域融雪径流模拟比较困难。本文以天山南坡的台兰河为例,利用融雪径流模型(SRM),分析模型及其变量参数计算率定方法;以台兰水文站的水文气象观测资料和MODIS 8d合成最大化积雪产品为基础资料,设2005年3~8月为模拟校准期,模拟资料稀缺山区流域融雪日径流,检验模型和模拟结果,评价SRM模型在数据稀缺流域的适用性。结果表明:SRM模型融雪径流模拟在台兰河流域具有比较好的模拟效果,参数率定比较合理,在天山南坡资料稀缺的山区流域径流模拟中具有很好的适用性。
Runoff simulation is an important part of hydrological process simulation. The watersheds on the southern slopes of Tianshan Mountain are mainly recharged by ice and snow melt in spring and summer. Snowmelt runoff has important practical significance for regional hydrology and water resources. Affected by the scarcity of data, it is difficult to simulate snowmelt runoff in mountainous areas. Taking the Tailan River on the southern slope of Tianshan Mountain as an example, this paper uses snowmelt runoff model (SRM), analysis model and its variable parameter calculation rate determination method. Hydrological and meteorological observation data from Tailan hydrological station and MODIS 8d synthetic maximum snow product The data from March to August in 2005 are used as simulation calibration period to simulate daily runoff, test model and simulation results of snowmelt run-off in scarce mountainous regions in order to evaluate the applicability of SRM model in data-scarce watershed. The results show that the simulation of snowmelt runoff simulation in the SRM model has good simulation results in the Tailan River Basin. The parameter rate is reasonable and has good applicability in the runoff simulation of mountainous watersheds with scarce data on the southern slope of Tianshan Mountains.