Abstract:

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.