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降雨是东北黑土区侵蚀沟发育主要动力因素,土壤、地形、地貌等下垫面因素地域性分异造成降雨对黑土区侵蚀沟发育的影响具有一定差异性,降雨侵蚀力是衡量降雨侵蚀能力的重要指标,与侵蚀沟的发育密切相关,选取3个典型小流域为研究对象,利用差分GPS实地测量获取侵蚀沟2013年雨季发育数据,计算各流域2013年雨季降雨侵蚀力,分析不同流域降雨侵蚀力与侵蚀沟发育的关系。研究发现,降雨侵蚀力对光荣、吉兴流域侵蚀沟发育影响显著,对光荣流域侵蚀沟发育影响相对较弱,平均1 MJ·mm/(hm2·h)降雨侵蚀力造成光荣、吉兴、五一流域侵蚀沟长度增加0.001、0.013、0.025 m,侵蚀沟面积增加0.037、0.02、0.334 m2,侵蚀沟体积增加0.078、0.144、0.154 m3。
Rainfall is the main driving force for the development of eroded gully in the black soil region of northeast China. Rainfall has different effects on the development of erosion gully in the black soil region due to the regional differences in underlying factors such as soil, topography and landform. Rainfall erosivity is a measure of rainfall erosivity Which are closely related to the development of erosion ditch. Three typical small watersheds were selected as the research objects. Rainfall growth data of 2013 were obtained by field measurements of differential GPS. The rainfall erosivity of each rainfall area in 2013 was calculated. The Relationship between Forces and Eroded Gully Development. The results showed that rainfall erosivity had a significant impact on the glorious erosion development of the Jixing watershed and the eroded erosion development in the glorious watershed. The rainfall erosivity of 1 MJ · mm / (hm2 · h) on average was glorious. The erosion channel length increased by 0.001,0.013,0.025 m in the first basin, 0.037,0.02,0.334 m2 in the erosion channel area, and 0.078,0.144,0.154 m3 in the erosion channel volume.