小陇山林区强降雨径流过程分析  

Runoff Process of Strong Rainfall in Xiaolongshan Forest Region

作　　者：杨海裕 张宋智 刘小林 蔺岩雄 袁一超 

机构地区：[1]甘肃省小陇山林业科学研究所,甘肃天水741022 [2]甘肃省小陇山森林生态系统定位研究站,甘肃天水741022

出　　处：《西北林学院学报》2012年第3期27-30,共4页Journal of Northwest Forestry University

基　　金：林业公益性行业科研专项(200804022)

摘　　要：为探讨在小陇山林区强降雨过程中地表径流的形成过程及其变化特征,利用实际观测资料分析了2次强降水径流过程。结果表明,由于2次降雨量和降水强度的不同,测流堰水位和流量有所不同,洪峰出现时间也不同。第1次降雨量为68.0mm,降雨历时9.50h,水位最高1.039m,集水区径流最大值滞后于降雨峰值2.66h,该集水区共计降水97 043.698m3,通过测流堰流出73 908.525m3;第2次降雨量为121.0mm,降雨历时7.00h,水位最高1.321m,集水区径流最大值滞后于降雨峰值5h,该集水区共计降水178 389.2m3,通过测流堰流出158 735.73m3。In order to understand the forming process and the change characteristics of the surface runoff during strong rainfall process in the Xiaolongshan Forest Region,by using the observation data,the runoff process of different rainfall intensities were analyzed.The results showed that：as a result of two different rainfall amounts and rainfall intensities,the weir water level and flow were all different and the flood peaks were also different.The first rainfall amount was 68.0 mm,which lasted 9.50 h and highest water level was 1.039 m,the max runoff of the catchment was 2.66 h later than the rainfall peak.The total precipitation of the catchment was 97 043.698 m^3 and flowed out 73 908.525 m^3 through the weir.The second rainfall amount was 121.0 mm,which lasted 7.00 h and highest water level was 1.321 m,the max runoff of the catchment was 5 h later than the rainfall peak.The total precipitation of the catchment was 178 389.2 m^3 and flowed out 158 735.73 m^3 through the weir.

关 键 词：小陇山 落叶阔叶林 降雨量 U-型测流堰 水位 径流过程 

分 类 号：S715.3[农业科学—林学]