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汶川地震对千佛山风景区造成严重的影响,直接诱发滑坡10处,崩塌数十处,形成大小堵塞坝4座,由此形成的松散物质总量大于1 700×104m3。2008年雨季有5条支沟暴发泥石流。在泥石流成因分析的基础上,选择流域形状、流域发育程度、沟床纵比降、山坡平均坡降、地层岩性和距发震断层距离6个指标,利用潜在泥石流判识模型,对流域内其余9条支沟进行了判断。结果显示,大部分沟道都具备形成泥石流的潜在条件。2009年雨季研究区全面暴发的大规模泥石流,验证判识的可靠性,表明该模型可以用于灾区潜在泥石流的判识。
Wenchuan earthquake caused serious impact on the Qianfoshan Scenic Area, directly induced 10 landslides, collapsed dozens of the formation of blockage dam 4, resulting in the total amount of loose material is greater than 1 700 × 104m3. Tributary outbreak of debris flow. Based on the analysis of the causes of debris flow, six indicators of basin shape, degree of basin development, vertical deviation of trench bed, average slope of the slope, formation lithology and distance from the seismogenic fault are selected. By using the potential debris flow identification model, The remaining nine branch ditches were judged. The results show that most of the trenches have the potential to form a debris flow. The large-scale debris flow of 2009 outbreak in the rainy season research area verified the reliability of the identification, indicating that the model can be used to identify the potential debris flow in the disaster area.