兰坪县七联村泥石流灾害特征及治理建议

THE DISASTER FEATURE AND CONTROL SUGGESTION OF DEBRIS FLOW AT QILIAN VILLAGE,LANPING

2019年8月7日,云南兰坪县金顶镇七联村出现短时强降雨,致使村东炼登大沟爆发泥石流灾害。泥石流一次堆积体方量约2.1万m^3,造成下游沘江河堵塞并形成堰塞湖,回水量约15万m^3。造成5户农户民房一层进水,约86亩农田受损,并对沘江河下游沿线居民生命财产形成巨大威胁。虽说险情已过去,但为了长治久安,建议该泥石流沟谷应采用稳拦的防治措施,将固体物质拦截在中上游,水石分流。辅以生物工程防治,开展水土保持及生态环境修复。

The temporal violent storm happened to Qilian village of Jinding town,Lanping on August 7,2019,which caused the disaster of debris flow of Lianden gully east of the village.The accumulated debris volume was about 21 thousand cubic meters and the dammed lake was formed on the lower reaches Bijiang eiver,with backwater about 150 thousand cubic meters,the 1st floor of 5 farmer family houses were flooded,about 86 mu farmer fields were damaged and the peoples'life and property along lower reaches Bijiang river were threatened seriously.Although the disaster has passed,we suggest that the debris flow gully must be processed with prevention and control measures of stable blockade in order to carry out the long term safe.The solid debris must be blocked on the upper-middle reaches,water and stone separated each other,prevention and control with biological engineering,conserve water and soil and recover the ecological environment.