陕西杨凌天然降雨雨滴特性研究  

Study on Characteristics of Natural Rainfall in Yangling,Shaanxi Province

作　　者：吴光艳[1] 吴发启[1] 尹武君[1] 宋向阳[1] 吴秋菊[1] 杨晓芬[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《水土保持研究》2011年第1期48-51,共4页Research of Soil and Water Conservation

基　　金：国家自然科学基金资助项目(40871133);国家重点基础研究发展"973"计划(2007CB407201)

摘　　要：天然降雨雨滴特性是土壤侵蚀的动力因子之一,是研究降雨侵蚀力规律的基本依据。运用虹吸式雨量计记录杨凌的天然降雨过程,同时采用滤纸色斑法观测天然降雨雨滴的特征,结合图形处理软件Image-J处理雨滴直径。研究结果表明:该区天然降雨雨滴大小分布符合Best函数式;雨滴中数直径、降雨动能与降雨强度呈幂函数关系,但关系式中的系数由于雨型的不同和观测范围的限制而存在一定差异。The natural rainfall raindrop characteristic is one of soil erosion power factors, and is the basic study of the rainfall agents of erosion rule. The process of natural rainfall was recorded by siphonic pluviograph, then the natural raindrop was observed with filter-color stain method, and the raindrop diameter was measured by computer software called Image-J. The results indicated that the distribution of natural raindrop size was coincidented with Best＇s function in Yangling. The relationship of the median raindrop diameter and the kinetic energy of rain with rainfall intensity can be expressed significantly degree dependence, but the relationship has some difference because of rainfall difference and observation scope limit.

关 键 词：天然降雨 降雨强度 雨滴中数直径 降雨动能 陕西杨凌 

分 类 号：S157[农业科学—土壤学]