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以长江上游丹江流域典型地区陕西省商南县为研究区,收集该地区2010年13个水文雨量站降雨资料,以经典算法计算的降雨侵蚀力作为基准值,对比分析6个简易模型的计算精度,并优选适用性最佳模型估算各站的降雨侵蚀力,插值绘制成空间分布图进行空间分析。结果表明:卜氏模型计算精度最高,平均达到89.325%,在研究区具有较好适用性。商南县2010年降雨侵蚀力平均为254.46 MJ.(hm2.h.a)-1.mm。7月份降雨量与降雨侵蚀力均达到最高,分别占年总量的50.41%和89.56%,降雨侵蚀力呈高度集中的季节分布态势。降雨侵蚀力空间分布不均匀,具有较为明显的高值区,南、北部较低,东北部地区几个站均较高,形成一个小范围高值区。
Taking Shangnan County, Shaanxi Province as a typical area in the upper reaches of the Yangtze River Basin as a study area, the rainfall data of 13 hydrological rainfall stations in this area were collected. Based on the rainfall erosivity calculated by the classical algorithm, the six simple models were calculated and compared Accuracy, and the best applicability model to estimate the rainfall erosivity of each station, interpolated and mapped into spatial distribution for spatial analysis. The results show that the Buchs model has the highest calculation accuracy, with an average of 89.325%. It has good applicability in the study area. In Shangnan County, the average rainfall erosivity in 2010 was 254.46 MJ. (Hm2.h.a) -1.mm. July rainfall and rainfall erosivity reached the highest, accounting for 50.41% and 89.56% of the total respectively. Rainfall erosivity was highly concentrated in the seasonal distribution. The spatial distribution of rainfall erosivity is inhomogeneous, with obvious high value areas, lower in the south and north, and several stations in the northeast are higher, forming a small area of high value area.