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。
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.
出处
《土壤》
CAS
CSCD
北大核心
2007年第4期633-636,共4页
Soils
基金
水利部淮河委员会资助项目"淮河流域重点区域水土流失监测模型专题研究"资助。
关键词
降雨侵蚀力
EI30法
R值新算法
土壤侵蚀
Rainfall erosivity, EI_(30), New algorithms of R_value, Soil erosion
