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根据黄土丘陵沟壑区的侵蚀产沙规律 ,将晋西羊道沟小流域划分为坡面、沟坡和沟道 3个大的地貌单元 ;并在坡面、沟坡和沟道不同的地貌部位建立了相应的侵蚀产沙关系式 ;在GIS空间分析的基础上 ,计算出流域的汇流网络 ,并引入到地貌分带研究中 ,计算结果反映了小流域不同地貌单元的侵蚀产沙规律 ,揭示了水沙汇流在小流域产沙中的重要意义。
According to the law of erosion and sediment production in the loess hilly and gully region, the Xiaolanggou small watershed in western Shanxi is divided into three large landform units, including slope surface, gully slope and channel; and on the slope, gully slope and different topography of channel Based on the GIS spatial analysis, the confluence network of the river basin was calculated and introduced into the study of landform zonation. The calculation results reflect the law of erosion and sediment of different geomorphic units in the small watershed, revealing the relationship between erosion and sediment yield, The significance of water and sediment sink in the sediment production of small watershed.