Erosive modulus of the purple soils was exponentially correlative to the runoff coefficient(R2=0.73-0.98,P<0.01),implying that runoff coefficient can be used to indicate and evaluate the soil erosion for such soil.
砂页岩紫色土的地表径流系数与土壤侵蚀模数呈显著指数相关(R2=0.73-0.98,P<0.01),说明地表径流系数可用于指示和评价易分散岩性土壤的水土流失状况。
参考来源 - 生态措施对亚热带丘陵区紫色土水土保持效应及机理·2,447,543篇论文数据，部分数据来源于NoteExpress
The runoff coefficient and the erosion modulus are related to the rainfall.
其径流系数与侵蚀模数与次降雨量、降雨强度有一定的相关性；
Annual precipitation had significant effects on the annual runoff coefficient.
年降水量对年径流系数的影响极显著。
Before 1980, no trend could be seen, but after 1980, the annual runoff coefficient tended to decrease.
年径流系数的变化和年径流量的变化相似，1980年以前无趋势性变化，1980年后有减小的趋势。
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