四川省金川县八步里沟泥石流灾害治理现状及对策

八步里沟位于金川县城郊,近百年间多次暴发泥石流,对金川县城造成严重危害。为了减轻泥石流对金川县的威胁,在各级政府和主管部门的支持下,中国科学院成都地理所(即中国科学院成都山地灾害与环境研究所)与当地政府及有关部门在80年代对八步里沟泥石流进行了综合治理。工程竣工至今其治理效果非常显著,近20年来再未发生泥石流灾害事件,有效地保护了县城逾万群众的生命财产安全。但是鉴于工程设计使用年限即将到期,加之后期缺乏妥善管理,工程的防灾减灾能力已逐步减弱。同时因工程发挥的防灾效益较好,致使当地民众的防灾减灾意识比较淡薄,一遇特大暴雨引发新的泥石流有可能引起较大灾害。因此对八步里沟进行进一步治理迫在眉睫。

The Controlling Actuality and Countermeasure of Debris Flow in Babuli Gully of Jinchuan County

Debris-flow hazards is one kind of mountain hazards.In our country,debris-flow brings great hazards to people who live in mountain regions.Babuli gully lies in outskirts of Jinchuan county which is an old debris-flow gully.To stop debris-flow hazards,under the help of the government and charge department of Jinchuan county,Institute of Geography,Chinese Academy of Science and Ministry of Water Conservancy,Chengdu took comprehensive measures for controlling debris-flow of Babuli gully in 1980s.The project effectively controls debris-flow,ten thousands of people live in a safety environment.At present,because the project is reaching to its limits,also,improper organization and management to the project,it gradually loses its function of controlling debris-flow hazards.Through investigating the debris-flow gully,it is found that there are many insecurity factors in the project.According to geographic characteristics of debris-flow in Babuli gully and previous measures to control debris-flow,the developing tendency of debris-flow is analyzed and the importance of controlling the debris-flow is dealt with on the basis of investigation on debris-flow damages.In the mean while,the damages and engineering purpose,design standards,main works of prevention and the comprehensive planning for controlling debris-flow are discussed.The suggestions on debris-flow control are put forward.