巴东县信陵镇城区暴雨泥石流分析

ANALYSIS OF THE STORM DEBRIS FLOW IN THE CITY PROPER OF XINLING TOWN,BADONG COUNTY

根据在野外调查研究工作基础上,对巴东县城信陡镇泥石流形成条件和基本特征进行了总结。认为本区泥石流有暴雨坡面型泥石流和暴雨沟谷型泥石流两类。其形成主要受地质地貌条件、松散固体物质来源条件,水源条件以及人类工程经济活动影响。并进行了发展趋势的初步预测,提出了防治原则及建议。

A seldom storm of special violence hit Badong County causing the torrents to rush down the northern mountain slope of Jinzishan behind the county seat and the torrents and debris flow to impact the city proper in the east of Badong County in June, 1991. Because of the sud-den accident, the violent destroying force was severely endangering the economic develop-ment and construction and people’s lifes and properties. In order to prevent from geological hazards, there must be surveyed and monitored the forming conditions and mechanism, types and characteristics of the storm debris flow in the city proper of Xinling Town, Badong County. It is considered that there are two types of debris flows of storm slope surface and storm gully(dissected valley). Their formations are mainly influenced by such conditions as geology and land form, loosened solid material source and water place, as well as human en-gineering economic activities. There are preliminarily prognosticated their development trend and put forward the principle and proposal for preventing and treating them, of which the main is to avoid them by dredging the gully; locally eliminating and intercepting the danger; stopping the human engineering and economic activities; establishing the monitor and prog-nostication system, and the dispersion and command system in order to pool our efforts and to pool the prevention and treatment of the masses to be no nuisance but preparation and faced with nuisance but no confusion.