台湾土石流研究综述

 台湾地狭人稠,平地开发趋于饱和。随着社会经济快速发展,使得山坡地陆续开发,破坏原有之水土保持,且台湾岛之山脉地质大多属沉积岩及变质岩,性质脆弱且易断裂,再加上年平均雨量高达2500mm,其中78%的降雨集中于5—10月的台风季节,因此台湾地区土石流频繁。为了解台湾地区土石流之研究沿革,搜集相关土石流之研究成果,并配合台湾地区重大灾害,分析土石流特性、土石流成分分析、危险评估与重建、抑制工程及现场调查仿真等方面的研究进展。

Overview on debris flows in Taiwan

In Taiwan historically,a dense population has developed on the western plain area of the country.Gradually,the hillsides are being occupied by more people who threaten to the natural soil and water(resources).The geologic mountain range of Taiwan mostly exists consists of deposit sedimentary rock and metamorphic rock,and its property is fragile and apt to rupture.In addition,the annual average rainfall pricipatation is around up to 2?500?mm,of which 78% falls from May to October in the typhoon season.The combination of these environmental circumstances frequently causes debris flows in the upland areas of Taiwan.Collected Studies about debris flow events had gathered to classify and describe the situation in Taiwan.The following topics will order by characteristics of debris flows,analysis of debris flow constituents,risks evaluation and(reconstruction),engineering for counter measurements and investigations simulation of investigations simulation in situation.