泾河南小河沟流域自然降雨特性
发布时间：2018-09-07 20:09
【摘要】：采用德国HSC-OTT Persivel32激光雨滴谱探测仪监测南小河沟流域自然降雨的雨滴谱,分析不同雨型自然降雨雨滴特征及其分布规律,并分析了降雨特性各要素间的相互关系。结果表明:(1)该区自然降雨雨滴直径集中在0.3~1.5mm,与黄土高原利用传统的滤纸色斑法测定结果基本一致,但略小于东北和闽南地区。当雨强I10mm/h时,雨滴中数直径随雨强的增大而增大;当I≥10mm/h时,雨滴中数直径骤然下降,这在一定程度上和雨强增大后大雨滴破裂有关。该地区雨谱随雨强的变化可用Best分布拟合。(2)普通型降雨雨滴数量随直径的分布曲线较平缓,其动能与雨强呈线性相关;而短阵型降雨的雨滴数量随直径的分布曲线较陡峭,其动能与雨强呈幂函数关系。两种雨型的降雨动能均随雨强的增大而增大,但短阵型降雨动能增大的更快,因此短阵型降雨的侵蚀力更大。
[Abstract]:The raindrop spectrum of natural rainfall in Nanxiaogou watershed was monitored by HSC-OTT Persivel32 laser raindrop spectrometer in Germany. The characteristics and distribution of raindrops in different rain patterns were analyzed, and the relationship between the elements of rainfall characteristics was analyzed. The results are as follows: (1) the diameter of raindrops in this area is concentrated at 0.3 ~ 1.5 mm, which is consistent with the traditional filter paper color spot method in the Loess Plateau, but slightly smaller than that in Northeast China and South Fujian. When the rain intensity is I10mm/h, the mean number diameter of the raindrop increases with the increase of the rain intensity, and when I 鈮，
本文编号：2229291
[Abstract]:The raindrop spectrum of natural rainfall in Nanxiaogou watershed was monitored by HSC-OTT Persivel32 laser raindrop spectrometer in Germany. The characteristics and distribution of raindrops in different rain patterns were analyzed, and the relationship between the elements of rainfall characteristics was analyzed. The results are as follows: (1) the diameter of raindrops in this area is concentrated at 0.3 ~ 1.5 mm, which is consistent with the traditional filter paper color spot method in the Loess Plateau, but slightly smaller than that in Northeast China and South Fujian. When the rain intensity is I10mm/h, the mean number diameter of the raindrop increases with the increase of the rain intensity, and when I 鈮，
本文编号：2229291
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