华南地质与矿产2017，Vol.33Issue(4)：411-418,8.DOI:10.3969/j.issn.1007-3701.2017.04.010
基于改进的FAST模型的千将坪滑坡涌浪研究
Study on impulse wave generated by Qian-jiangping landslide based on improved FAST model
摘要
Abstract
Qianjiangping landslide is a typical impulse wave example generated by landslide in shallow water area in Three Gorges Reservoir,but there are seldom water dynamic process and impulse wave research progress, especially focusing on waterway in range of big region and long distance. Based on the formulae derived from physical experiments on impulse wave generated in shallow water,numerical model of landslide-induced impulse wave in shallow water is built in the former Code named Forecasting Analysis System for Tsunami generated by landslides, and study on impulse wave generated by Qianjiangping landslide is carried out, updating the FAST landslide impulse wave calculation system and establishing the corresponding wave source model.The numerical calculating region is 18.6 km×11.8 km,including the Yangtze River and its branch around Qianjiangping land-slide.The calculating results show that the maximum of impulse wave is about 38.8 m and the maximum run-up is about 36.7 m.The spatial distribution of impulse wave presents that there are about 10.5 km long waterway with impulse wave above 1 m-height,there are about 9.3 km long waterway with impulse wave above 2 m-height,and there are about 8 km long waterway with impulse wave above 3 m-height.The waterway with impulse wave above 1 m-height concentrated distribute in Qinggan river and Luogudong River.There exist rapid decay and enlarge-ment effect when impulse wave propagate in waterway encountering various topographical.Comparing with multi-source data,the run-up values are differ in about ±2 m with the correlation coefficient of 0.97.The established impulse wave numerical model has the advantages of less computation resource consumption, fast calculating speed and better accuracy numerical results.This numerical model of landslide-induced impulse wave in shallow water is beneficial to the research on impulse wave problem in branch or shallow water in reservoir, which can give important technical support for forecasting and prewarning on landslide-induced impulse wave in huge re-gion and long distance.关键词
千将坪滑坡/浅水区滑坡涌浪源模型/水波动力学/涌浪过程/影响范围Key words
Qianjiangping landslide/numerical model of landslide-induced impulse wave in shallow water/wa-ter wave dynamic/impulse wave process/effect range分类
天文与地球科学引用本文复制引用
赵永波,王健,黄波林,谭建民,王世昌..基于改进的FAST模型的千将坪滑坡涌浪研究[J].华南地质与矿产,2017,33(4):411-418,8.基金项目
国家自然科学基金(编号:41372321). （编号:41372321）
