中文摘要：

对直线斜坡型（S）、上凸型（C）、阶梯型（L）3种不同形态岸坡上径流中的氮素浓度的变化进行研究。结果表明，3种形态岸坡上径流中的氮素浓度由高到低依次为S〉C〉L，即L形态岸坡的纳污能力相对于其他两种形态的岸坡较好；降雨强度越大，L形态岸坡上各采样点的氮素浓度的平均差值越大，则越能体现出L形态岸坡对径流中氮素的截留效果最好；无论有无植被覆盖，L形态岸坡都表现出较大的截留效果。综上所述，研究不同形态的岸坡对径流中氮素运移转化的影响非常重要，对以后的岸坡治理具有一定的理论指导意义和实用价值。

英文摘要：

Three bank slope forms[linear slope type（S）, convex type（C）, ladder-type（L）] effects on the change of nitrogen concentration in the runoff were studied. The results showed that the nitrogen concentration in the runoff of the three bank slopes from high to low was S〉C〉L, so the carrying capacity of L was the best in the three bank slope forms. In addition, when the rainfall intensity was greater, the mean difference of the nitrogen concentration on the sampling points of L was maximum, it reflected that the interception effect of L for the nitrogen concentration in the runoff was the best. Moreover, whether the vegetation covered, L still showed the greater rejection. In summary, the study of the different bank slope forms effect on the transport and transformation of nitrogen in runoff was very important. Meanwhile, this study had certain theoretical significance and practical value to the following bank slope governance.