云南昭通鲁甸县“2014.8.3”地震牛栏江红石岩堰塞湖风险分析及应急处置
Barrier-Lake Risk Analysis and Emergency Management-A Case Study of“2014.8.3”Earthquake in Zhaotong City
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摘要: 2014年8月3日,云南省昭通市鲁甸县发生6.5级地震,最高烈度Ⅸ度。地震导致牛栏江干流红石岩大坝下游600 m处的右岸山体崩塌并阻断河道,形成堰塞体高度102 m、方量1200万m3、库容2.6亿m3的大型堰塞湖。通过调洪与溃坝计算,分析了堰塞湖对上下游的影响、堰塞湖的风险及处置面临的困难,提出了堰塞湖处置的原则,通过工程措施和非工程措施相结合的应急处置方案,有效降低了红石岩堰塞湖的溃坝风险和淹没损失,为进一步提高堰塞湖防洪标准,给出了后续处置和后期整治建议,为堰塞湖风险分析与应急处置提供借鉴。Abstract: On August 3, 2014, an earthquake with a magnitude of 6.5 degree and highest intensity of 9 degree hit Ludian County of Zhaotong City, Yunnan Province. It caused the col apse of the right side of the mountain at 600m downstream of Hongshiyan Dam and blocke