降雨侵蚀力新算法在豫西山区应用的初步研究

Application of a New Algorithm to Assessment of Rainfall Erosiveness in Mountaineous Regions in West Henan

摘要:

降雨侵蚀力是定量监测评价一个地区土壤侵蚀状况的重要因子之一,找到适宜简便的计算方法十分重要。卜兆宏提出的降雨侵蚀力新算法具有简便易用的优点。本文利用位于豫西山区鲁山县的3个水文雨量站10年185次的自记降雨过程资料,以经典算法年R值为基准,对新算法在该区的适用性进行了分析评价。结果表明:新算法结果与经典值存在高度的一致性,一致性高达90.2%,模型有效系数为96.4%,相对误差为7.7%,说明新算法能够在该区应用,可以采取此法对该区的降雨侵蚀力进行深入的分析研究;并同时对资料摘读时应该注意的问题进行了讨论。

Abstract:

Rainfall erosiveness is a fundamental factor for quantative monitoring and assessment of soil erosion. So it is very important to identify a convenient model or algorithm for assessing rainfall erosiveness. Based on 185 individual rainfalls at three stations in 10 years, R-value was calculated with EI₃₀ and a new algorithm proposed by Bu Zhao-hong, separately. Results showed that the latter suits the region well. Further study of R-value of the region can be carried out by this way. Meanwhile, some issues that should be paid attention to in collecting data were put forward.