中文摘要：

在供水系统遭遇突发性污染事件的恢复中，存在恢复目标与有限应急预算、响应速度与成本、治理效果与二次污染等多方面冲突。针对上述问题特点，建立了恢复策略优化及选择模型，在优化恢复活动调度及资源配置的基础上，选择最优恢复技术，使得供水系统在满足资金预算、功能恢复目标、水质指标变化约束的前提下恢复时间最短；同时，针对模型的特点进行了模型转化，以提高求解速度。最后，通过数值实验验证了模型的有效性，仿真结果表明：合理的策略优化与选择能够有效缩短应急恢复时间，提高供水系统恢复能力。

英文摘要：

There exist conflicts between limited budget and recovery target, response speed and cost, and recovery utility and secondary pollution in emergency recovery of water supply system under pollution events. This study establishes an optimization model based on the characteristics of water emergency recovery, to optimize the scheduling and resources allocation, and then select the optimal recovery technology. The objective of the model is to minimize recovery time under the constraints of budget, functionality recovery requirement, and water quality requirements. Subsequently, based on model analysis, model conversion is conducted to facilitate the computing time. Finally,the numerical experiment illustrates the effectiveness of the model, and the simulation results show that effective recovery strategies can reduce recovery time and enhance recovery capacity of water supply system.