Abstract：
To determine the security status of urban water supplies, a comprehensive evaluation model of urban water supply security based on the VIKOR and TOPSIS models is proposed. The comprehensive evaluation value K is obtained as the evaluation result, and the larger K is, the higher the safety of the urban water supply. The results show that the security of the water supply in Tianjin increased from 0.2300 in 2015 to 0.8026 in 2018. Although it slightly decreased to 0.5439 in 2019, it was still at a high level and increased to 0.7508 in 2020. The urban water transmission and distribution status, the service level of the water supply industry, and the status of sewage treatment play positive roles in affecting the safety of the water supply in Tianjin, and the status of urban water sources and the urban water use status are the main factors that reduced the safety of the urban water supply. According to the results of an obstacle degree model and the actual conditions in the study area, it is suggested that Tianjin should continue to focus on the development of water resources and the utilization of unconventional water sources and actively promote the construction of a water-saving society.
摘要：
确定城市供水安全状况,提出了基于VIKOR和TOPSIS模型的城市供水安全综合评价模型。综合评价值K作为评价结果，K越大,城市供水的安全性越高。结果表明,天津市供水安全状况从2015年的0.2300上升到2018年的0.8026。虽然2019年小幅下降至0.5439，但仍处于高位，2020年上升至0.7508。城市输配水现状,供水行业的服务水平，污水处理状况对影响天津市供水安全起到了积极作用,城市水源状况和城市用水状况是降低城市供水安全的主要因素。根据障碍度模型的结果和研究区的实际情况，建议天津市继续以水资源开发和非常规水源利用为重点,积极推进节水型社会建设。
