中文摘要：

三峡库区蓄水后对长江水体自净能力的极大削弱,沿江聚集的各类生产、生活活动对长江水质的多渠道污染极易引发库区各类水体污染公共安全事件。结合对库区水体污染公共安全事件多维度诱发因素的调研结果,运用事故树的分析方法对三峡库区水体污染公共安全事件的逐级诱发过程进行分析。研究表明：存在13条诱发库区水体污染公共安全事件的路径以及3条防治水体污染公共安全事件的路径;在不考虑诱因发生概率的情况下,排污因素是诱发库区水体污染公共安全事件最重要、最根本的因素,促成库区水体自净能力下降的回水区变长,水流紊动减弱和水位抬升三方面因素是次重要的诱发因素。只有对不同的诱因施行不同的监测和控制策略,才能对库区水体污染公共安全事件开展有效预警、预控。

英文摘要：

After the water storage of Three Gorges Reservoir（TGR）,the weakened capability of the water self purification in the Yangtze River and multi-source water pollution from various producing and living activities along the Yangtze River make it easy to induce public security incident on water pollution.With investigation of inducing factors of public security incident on water pollution in TGR,this article utilized the fault tree analysis method to study the inducing process of the incident.The calculation results show that there are 13 inducing paths and 3 preventions approaches of the public security incident.Without considering the occurring probability of inducing factor,the most important and basic inducing factor is the pollution discharge and then followed by the elongated backwater region,the weakened flow turbulence and the raising water level which contribute to the capability undermine water self purification.The conclusion is that only applying distinct detection and prevention strategies to different inducing factors,the early warning and pre-control measures for public security incident on water pollution in Three Gorges Reservoir can be effective.