Advances in Earth Science
Chen Rensheng, Yang Yong, Han Chuntan, Liu Junfeng, Kang Ersi, Song Yaoxuan, Liu Zhangwen
Chen Rensheng, Yang Yong, Han Chuntan, Liu Junfeng, Kang Ersi, Song Yaoxuan, Liu Zhangwen. Field Experimental Research on Hydrological Function over Several Typical Underlying Surfaces in the Cold Regions of Western China[J]. Advances in Earth Science, 2014, 29(4): 507-514.
In the cold regions of western China, underlying surfaces are mainly (87.7%) composed of grassland, meadow and desert. However, the hydrological functions of these landtypes are unclear and lacking in adequate measured data. Based on the 4-year (2009-2012) observation work at point scale, small watershed scale and simulation results from Soil-Vegetation-Atmosphere Transfer (SVAT) system, it concludes that the alpine desert should be the primary runoff production area, which takes part 12% of high-cold region. While the alpine grassland and meadow (taking about 64%) contribute to the watershed runoff a little, its ecological function is more evident than its hydrological function. Combined with other research results in the literature, runoff coefficient for different landsacpes can be sorted as: glacier>cold desert>swamp meadow>hill slope shrub>meadow>alpine grassland>forest. If the vegetation belt moves upward under the global warming, the runoff coefficient will decrease in the alpine watershed of China.