中文摘要：

水土流失是黄土高原地区重要的环境问题之一,淤地坝措施作为该区水土流失治理的重要工程措施之一发挥了巨大作用,但其淤积过程与水毁机理的研究较少。本文在全面调查黄土高原淤地坝的基础上,选取典型淤地坝,挖取剖面进行测量和分层取样,利用库容曲线和实测每个淤积层的淤积厚度求得每层淤积泥沙量,运用灰色关联分析法,系统地研究了侵蚀性降雨的4个指标（降雨侵蚀力R、降雨量P、最大30min降雨强度I30、平均降雨强度I）与坝地泥沙淤积量之间的关联度。结果表明,降雨侵蚀力R和坝地泥沙淤积量的发展趋势最为密切,呈幂函数关系;降雨量P对淤积量的影响仅次于降雨侵蚀力,其关系呈指数型;最大30min降雨强度I30和平均降雨强度I对坝地泥沙淤积量的影响较小。

英文摘要：

This research presents the authors＇ comprehensive investigation of check dams in the Loess Plateau so as to find the correlation between the amount of depositing sediment and the four indexes of erosive rainfall, e.g. the maximum rainfall intensity in thirty minutes （ 130 ）, rainfall amount （ P ）, rainfall erosivity （ R ） and average rainfall intensity （I） through a grey correlation analysis. In doing so, we have chosen some typical check dams, trying to obtain such information as the thickness of each layer on the section planes, the reservoir storage capacity, and the volume of the depositing sediment of each layer by digging plane sections of typical check dams to analyze the depositing process. As is known, soil and water loss is a very serious problem in Loess Plateau, for it takes away rich soil and creates an environmental problem. However, little attention has so far been paid to the study of the depositing process and the water-induced damage. In this paper, we have conducted large amount of calculation of the depositing sediment in each layer by combining the volume and the dry bulk density so as to work out the actual value of the lost soil and the economic loss the corrosion process has brought about to the Plateau. Based on the above calculation, we have finally disclosed the grey correlation between the amount of depositing sediment and the four indexes of erosive rainfall, i.e. the maximum rainfall intensity in thirty minutes （130）, the rainfall amount （P）, the rainfall erosivity （R） and average rainfall intensity （I）. And the results of our detailed study show that the correlation between the rainfall erosivity and the depositing sediment amount is of top importance followed by the relation between the rainfall amount and sediment amount. The relation equations between the sediment amount and the rainfall erosivity, as well as the rainfall amount have been established respectively. And the final results indicate that there exists an exponential function （y = ae