三眼峪沟泥石流灾害及其综合治理

Study on Comprehensive Controlling of Debris Flow Hazard in Sanyanyu Gully

通过对甘肃省甘南藏族自治州舟曲县城北三眼峪沟泥石流形成条件、发育机制及特征的研究，阐述了该沟泥石流灾害的严重性和治理的必要性。提出了以拦档工程为主，并结合泥石流停淤场、排导沟、防冲槛和生物措施的综合治理方案。工程建成后，年减灾和经济效益达314．5万元，泥石流变成一般挟沙洪水，其对县城的危害基本消除。

Through discussion on the formation mechanism and the features of debris flow in Sanyanyu gully in Zhouqu county, the seriousness of debris flow disaster and necessity of its prevention are analyzed, A comprehensive controlling program is put forward,which is to take the blocked works as dominant measure, meanwhile to combine debris flow silting ground, draining channel and biological measure. After controlling works finished,there will be 3. 14 million yuan of disaster reductional benefit,and economic benefit will be produced per year, debris flow changes to usual flood flow and its threat to Zhouqu county town will be eliminated at last.