摘要
双沟、滩山沟流域内地势陡峻,植被覆盖率低,物源丰富,降雨集中且暴雨频发,具备暴发泥石流的有利条件。利用有限差分软件开展自然状态下不同降雨频率(P=1%、P=2%和P=5%)的数值模拟,结果表明,随着频率的降低,泥石流堆积面积、最终流速和最终流深均呈增大趋势。对流域进行危险性评价表明,主沟道及堆积区危险性较高,有必要进行防治。
The terrain of Shuanglonggou and Tanshangou drainage basin is high and precipitous,the vegetation coverage is low,provenance is rich,rainfall is concentrated,and rainstorm is frequent.These are the favorable conditions for debris flow.Numerical simulation of different rainfall frequencies(P=1%,P=2%and P=5%)is done under natural state through finite difference software.The results show that there is decrease of frequency,debris flow accumulation area,and final flow velocity and depth increase.The results of risk evaluation of basin show that risk of main channel and accumulation area is high,so it needs to be treated.
作者
柳军
年峰
邹转妮
Liu Jun;Nian Feng;Zou Zhuanni(Gansu Forestry Polytechnic,Tianshui 741020,China;Xiaolongshan Forestry Research Institute of Gansu Province,Tianshui 741020,China)
出处
《黑龙江科学》
2023年第2期25-28,共4页
Heilongjiang Science
基金
甘肃省高等学校创新基金项目“泥石流数值模拟及防治对策研究——以麦积区双沟、滩山沟为例”(2021B-408)
2021年国家大学生创新训练项目“基于数值模拟的泥石流工程治理效果评价”(202112835005)。
关键词
泥石流
数值模拟
有限差分
危险性评价
Debris flow
Numerical simulation
Finite difference
Risk evaluation
