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| DOI：10.13522/j.cnki.ggps.2017.0622 |
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| Modelling Runoff of the Melted Snowpack in Western Tianshan Mountain Using the SRM Model |
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TANG Rui, MU Zhenxia, ZHOU Yulin, YIN Ziyuan, PENG Liang
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College of Water Conservancy and Civil Engineering， Xinjiang Agricultural University， Urumqi 830052, China
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| Abstract: |
| 【Objective】The objective of this paper is to model flow of the meted snowpack in western Tianshan Mountains aimed to help rationally use of the ice and water resources.【Method】 We used the SRM model, with full consideration of the possible effects of dynamic changes in the snowline, to simulate the runoff of the melted snowpack in the Kashi River basin based on the hydrological and meteorological data measured from 1990 to 2000, as well as the MODIS and DEM data. 【Result】 The coefficient of determination and volume difference of the modeled results were 0.83 and 6.81% respectively for the calibrated period, and 0.82 and 12.69% respectively for the verification period. The elevation of the snowline and the associated snow coverage was correlated with R2>0.88. Using this correlation, we estimated that when the elevation of the hypothetical snowline increased by 100 m and 200 m, the associated runoff increased by 1.63% and 0.14% respectively. In contrast, when the elevation of the snowline decreased by 100 m or 200 m, the associated runoff increased by 19.72% and 33.92% respectively.【Conclusion】 The proposed model works well in the studied area. There is a good correlation between the elevation of the snowline and the associated snow cover, and an decrease in snowline elevation leads to a substantial increase in runoff. |
| Key words: SRM model; MODIS; snowmelt runoff; snowline |
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