甘肃西峰地区刺槐林冠对降雨特性的影响研究  

Effect of Robinia pseudoacacia canopy on rainfall characteristics in Xifeng area,Gansu province

作　　者：乔勇虎 郭东静 陈锡云 QIAO Yonghu;GUO Dongjing;CHEN Xiyun(School of Geographical Sciences, Shanxi Normal University, Linfen 041004, China;Library,Shanxi Normal University, Linfen 041004, China;Department of Geography, Beijing Normal University, Beijing 100875, China)

机构地区：[1]山西师范大学地理科学学院,临汾041004 [2]山西师范大学图书馆,临汾041004 [3]北京师范大学地理科学学部,北京100875

出　　处：《干旱区资源与环境》2018年第5期160-164,共5页Journal of Arid Land Resources and Environment

基　　金：国家"十二五"科技支撑项目(2012BAB02B05)资助

摘　　要：使用德国HSC-OTT Persivel32激光雨滴谱探测仪监测甘肃西峰地区刺槐林内外降雨特性数据,定量分析刺槐林冠对雨滴大小、终点速度、降雨动能的影响规律。结果表明:1)刺槐林外雨滴直径主要集中在0.31~1.06mm范围内,最大雨滴直径为2.13mm;林内雨滴直径主要集中在0.19~0.94mm范围内,最大雨滴直径为1.38mm。2)相同雨强下林内雨滴中数直径小于林外,林内外雨滴中数直径差值随雨强增大而增大并最终稳定在0.40~0.60mm范围内。3)刺槐减小了一定直径范围内(2.38 mm>d>1.38mm)雨滴的终点速度,减小幅度10%~63%。4)雨强I<1.5mm/h时,刺槐林内降雨动能大于林外,雨强I≥1.5mm/h后,林内降雨动能小于林外,动能削率最大为50%。This study applied the Germany HSC - OTT Persive132 and traditional rain cylinder to monitor the rainfall characteristics inside and outside of the Robinia pseudoacacia canopy in Xifeng area of Gansu province, and quantitatively analyzed the effects of R. pseudoacacia canopy on the raindrops size, the raindrop speed and the kinetic energy of rainfall. The results show that ： （ 1 ） Raindrops diameter outside R. Pseudoacacia forest was mainly concentrated in the range of 0.31 -1.06 mm, and the maximum raindrop diameter was 2.13 mm. The raindrops diameter inside the forest was mainly concentrated in the range of 0.19 - 0.94 mm, and the maximum raindrop diameter was 1.38 mm. （2） The raindrop diameter inside forest was less than outside under the same rainfall intensity. The difference of median diameter of raindrops between inside and outside forest increased with rainfall intensity which finally stable in the range of 0.4-0.6mm. （3） Acacia trees reduced the raindrop speed whose diameter range between 1.38mm and 2.38mm and the decreasing range in 10%-63%. （4） When rain intensity I 〈 1.5 mm/h, the rainfall kinetic energy inside R. pseudoacacia trees were larger than outside of it. While, it was opposed when rain intensity I 〉 1.5 mm/h whose maximum kinetic energy reduction rate was 50%.

关 键 词：降雨特性 刺槐 雨强 降雨动能 西峰地区 

分 类 号：S715.3[农业科学—林学]