沈阳地区天然降雨雨滴特征对坡面产沙量的影响

发布时间：2018-10-29 11:16

【摘要】：为了探究沈阳地区天然降雨雨滴特征与产沙量的关系,在天然降雨条件下,使用滤纸色斑法计算雨滴特征,利用野外径流小区(长8m,宽1m)采集沙样。运用相关分析法、灰色关联分析法和模糊贴近度分析法分析了降雨强度、雨滴动能、雨滴中值粒径、雨滴终点最大速度和雨滴质量与产沙量的关系。结果表明:经过相关分析和灰色关联分析,影响坡面产沙量的顺序为降雨强度雨滴动能雨滴中值粒径最大雨滴终点速度雨滴质量,模糊贴近度分析表明降雨强度对坡面产沙量的影响最大,降雨动能其次,雨滴质量影响最小。坡面产沙量分别与降雨强度、雨滴中值粒径、雨滴动能呈幂函数关系;天然降雨雨滴中值粒径与降雨强度呈幂函数关系;雨滴中值粒径和雨滴质量是雨滴动能的主要影响因子。
[Abstract]:In order to study the relationship between raindrop characteristics and sediment yield in Shenyang area, filter paper color spot method was used to calculate raindrop characteristics, and sand samples were collected from field runoff plot (8m long and 1m wide). Correlation analysis, grey correlation analysis and fuzzy closeness analysis were used to analyze the relationship between rainfall intensity, raindrop kinetic energy, mean diameter of raindrop, maximum velocity of raindrop end point and raindrop mass. The results show that the order of influencing sediment yield on slope is rainfall intensity, raindrop kinetic energy raindrop median diameter, maximum raindrop end point velocity, raindrop mass through correlation analysis and grey correlation analysis. Fuzzy closeness analysis shows that rainfall intensity has the greatest influence on sediment yield on slope surface, rainfall kinetic energy is the second, and raindrop quality is the least. Sediment yield on slope is related to rainfall intensity, median diameter of raindrop, kinetic energy of raindrop is power function relationship, median diameter of raindrop and mass of raindrop are main influencing factors of raindrop kinetic energy.
【作者单位】：沈阳农业大学水利学院;鞍山市千山区水资源办公室;
【基金】：辽宁省自然基金“坡耕地不同耕作模式产流产沙规律试验研究”(201102193)
【分类号】：S157.1

【参考文献】