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把降雨方向定义为一场暴雨降落方向的平均倾角.这在常规的土壤侵蚀过程研究中,并没有真正监测到.然而,在斜坡表面上降雨方向对降雨侵蚀和径流量会产生影响,根据斜坡裸露的程度也可能对土壤流失和径流量得出不同的结果.在埃塞俄比亚的一个流域中进行了大量调查,可以看出几个世纪以来土壤侵蚀造成的损失可归因于均匀的降雨方向.斜坡坡面正对着降雨方向时其土壤侵蚀的损失要比背对降雨方向时的损失大得多(背风效应).在Wischmeier地区根据暴雨侵蚀数值的常规记录得出了一种简易的理论模型来测定降雨方向的影响.本模型使用四个倾角雨量器来测量和计算暴雨方向的平均数.然后,在野外自然降雨条件下用一个特殊的装置引导雨滴倾斜地连续地流到试验小区,它的野外测数证实了模型的估计.然而,本文中即使将降雨方向的数据包含在侵蚀计算之内,但在测量中得出的侵蚀与土壤流失之间的关系也没得到改善,其原因可能是数据的收集和分析不够准确,同时受到这次试验的暴雨次数所限制.如果用更多的数据加以比较,那么将会获得更好的结果.用这种方法在埃塞俄比亚高地曾收集了五百多次暴雨的土壤流失和降雨倾角的数据,这里就不多介绍了.一般说来,在研究土壤侵蚀过程中用降雨方向测量也是为了气候监测,尤其是在这一区域内降雨方向在
The direction of rainfall is defined as the average dip of a rainstorm landing, which is not actually observed in the conventional soil erosion study, however, the direction of rainfall on the slope surface has an impact on rainfall erosion and runoff, The level of nudity can also lead to different results for soil loss and runoff.A large number of surveys conducted in a river basin in Ethiopia show that the loss of soil erosion over centuries can be attributed to a uniform rainfall pattern Landslides are directed at the direction of the rain with much less loss from soil erosion than from the direction of the rainfall (leeward effect). A simple theoretical model based on the conventional records of rainfall erosion values in Wischmeier The effect of rainfall direction is measured in this model, which uses four inclinometers to measure and calculate the average number of rainstorms.And then, a special device is used to guide the raindrops to flow obliquely and continuously to the experimental plot under natural rainfall in the field. Field measurements confirm the model’s estimates, however, even though the data in the direction of rainfall are included in the erosion calculation in this paper The relationship between erosion and soil erosion did not improve in the survey because of the inaccurate data collection and analysis and the limited number of torrential rains in this trial.With more data to compare , Then better results will be obtained.With this method we have collected data on soil erosion and rainfall dip for over 500 heavy rains in the highlands of Ethiopia.There is little introduction here.Generally speaking, The use of rain direction measurements is also for climate monitoring, especially in this area where the direction of rainfall is