1995年康定城区洪灾成因分析

分析洪灾成因 :长时间连续降雨和随后而至的暴雨 ,是山洪成灾主要因素 ;特殊的水系结构使洪峰流量在城区河流汇合处叠加 ;山洪的动能大 ,挟带泥沙和冲蚀能力强 ;泥石流、滑坡、崩塌强烈活动 ,为山洪提供大量泥沙、推移质 ;人类经济活动不当 ,加大了灾害损失

FLOOD CAUSESIN TOWN PROPER OF KANGDING IN1995

County Town of Kangding in Sichuan Province,suffered 3times from heavy flood damages in 1 995. The causes forming mountain torrents damage were as follows:1 . Long-term steady rain and successively rainstorm were primary factors.2 .Flood peak flow piled up atthe confluence of 2 rivers along town area by the special river system.3. Because topography is high and precipitous there,the mountain torrents had enormous kinetic energey and capacity of carrying silt.4 .Debris flow,landslide and collapse pro- vided a large number of siltand the bed load for mountain torrents.5.The losses caused by mountain torrents were added seriously because of improper human economic activi- ties.