CAJ | 학술논문

降雨侵蚀力是反映由降雨引起土壤侵蚀的潜在能力,是土壤侵蚀模型的重要因子.降雨侵蚀力指标就黄土高原,不同的学者提出不同的指标.雨型对土壤侵蚀影响很大,根据降雨特性分为三种雨型,通过对黄土丘陵沟壑区岔巴沟流域降雨的最大时段雨强与能量的乘积EI_t与土壤侵蚀模数直线回归,并对各个相关性系数r之间进行了显著性分析表明,研究区所有雨型条件下从r_(EI10)到r_(EI60)各r_(EIt)之间没有显著性差异;短阵型雷暴雨(A型雨)r_(EI10)与r_(EI30)没有显著性差异但与r_(EI40)有显著性差异,锋面夹雷暴雨(B型雨)其r_(EI10)与r_(EI100)中各r_(EIt)都没有显著性差异.因此,认为黄土丘陵沟壑区的降雨侵蚀力指标EI_(10)到EI_(30)各EI_t都可以采用,并且可以被相应简易因子PI_t替代.
강우침식력시반영유강우인기토양침식적잠재능력,시토양침식모형적중요인자.강우침식력지표취황토고원,불동적학자제출불동적지표.우형대토양침식영향흔대,근거강우특성분위삼충우형,통과대황토구릉구학구차파구류역강우적최대시단우강여능량적승적EI_t여토양침식모수직선회귀,병대각개상관성계수r지간진행료현저성분석표명,연구구소유우형조건하종r_(EI10)도r_(EI60)각r_(EIt)지간몰유현저성차이;단진형뇌폭우(A형우)r_(EI10)여r_(EI30)몰유현저성차이단여r_(EI40)유현저성차이,봉면협뇌폭우(B형우)기r_(EI10)여r_(EI100)중각r_(EIt)도몰유현저성차이.인차,인위황토구릉구학구적강우침식력지표EI_(10)도EI_(30)각EI_t도가이채용,병차가이피상응간역인자PI_t체대.
Rainfall erosivity is a reflection of potential soil erosion caused by rainfall and an important factor of soil erosion models. Different scholars put forward different index for rainfall erosivity on the Loess Plateau. To check the influence of rainfall on soil erosion, rainfall patterns are classified into three types according to rainfall characteristics. Linear regression between EI_t (maximum period of rainfall intensity and energy product) and soil erosion modulus within Chabagou watershed in a hilly loess region of the Loess Plateau is first analyzed. Then all coefficients of correlation r significance are tested. The results show that there is no significant difference from r_(EI10) to r_(EI60) for all rain patterns in the study area. For short thunderstorm (rain pattern A), there is no significant difference from r_(EI10) to r_(EI30), but'significant difference between r_(EI10) and r_(EI40). There is no significant difference from r_(EI10) to r_(EI100) for frontal rain mixed short thunderstorm ( rain pattern B). Therefore, every EI_t from EI_(10) to EI_(30) can be used as the rainfall erosivity, and can be substituted by the corresponding simple factor PI_t.