甘肃燕儿沟泥石流形成条件及特征参数分析

Study on Forming Conditions and Characteristic Parameter of Yan'er Gully debris Flow in Gansu Province

"5.12"大地震后,甘肃陇南山区地质环境急剧恶化,崩塌、落石、滑坡和地裂缝频发,导致燕儿沟流域内山体更加破碎,为泥石流发育提供了充足的物源条件。在强降雨条件下,极易形成泥石流,严重威胁灾区的生产生活。根据现场调研,对燕儿沟泥石流形成条件进行了分析;并对泥石流的运动学和动力学参数进行了分析计算。结合燕儿沟泥石流形成发育特点,提出了以稳定沟床和排导为主;主、支沟治理相结合;工程治理及生物水保措施相结合的综合治理建议,也为同类工程提供了参考依据。

After the ＂5. 12＂earthquake,geological environment in Longnan mountainous area of Gansu province has deteriorated sharply. Frequent landslides,rockfall,landslide and ground fissures,resulting in more broken Yan＇er gully mountain. This provides an adequate source of material for the debris flow. Under heavy rainfall conditions,the formation of debris flow,a serious threat to the production and life of the disaster area. Based on the field investigation,formation conditions of Yan＇er gully debris flow are analyzed. The kinematic and dynamic parameters of debris flow are analyzed and calculated. Reference Yan＇er gully debris flow formation characteristics,giving suggestion on mainly making the channel bed stability,management of the debris flow; main channel and branch gullies with governance recommendations. It also provides reference for the similar projects.