径流侵蚀与沟宽变化特征  

Runoff erosion and rill width variation characteristics

作　　者：柳方明 李斌兵[2] 李俊利[1] 

机构地区：[1]中国人民武装警察部队工程大学研究生管理大队,陕西西安710086 [2]中国人民武装警察部队工程大学信息工程系,陕西西安710086

出　　处：《济南大学学报（自然科学版）》2016年第3期230-234,共5页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金项目(41171224);水利部黄土高原水土流失过程与控制重点实验室开放课题基金(201402)

摘　　要：进行径流冲刷实验,监测坡面细沟的动态侵蚀过程;利用视频分帧技术和Arc Map测量工具,记录相同坡度、不同流量和相同流量、不同坡度等条件下坡面沟宽变化数据;结合沟宽数据,进行线性拟合,分析沟宽的变化规律。结果发现,坡度相比于流量对细沟演变速度影响更大。沟宽与产流历时基本成3次方函数关系,其典型断面函数相关性均在0.84以上,可为坡面侵蚀计算模型提供参考依据。The dynamic process of rill erosion on slope was monitored based on the runoff erosion experiment. With the help of video frame technology and Arc Map measuring tool,the variation of rill width on the slope was recorded under the condition of same slope with different flow discharge and same flow discharge with different slope. With the rill width data,linear fitting is performed to analyze its characteristics. The results show that,slope degree has more influence on the rill variation speed than flow discharge;Rill width and runoff duration time coincide with cubic function relation,and the correlation function of typical section is over 0. 84. These findings provide a reference for modeling rill erosion.

关 键 词：径流侵蚀 沟宽 3次函数 相关性 

分 类 号：S157.1[农业科学—土壤学]