水资源紧缺已成为全球性问题。城市雨水作为一种宝贵的资源,已经成为一些国家和地区的重要水源。通过对天津市降水特征的监测分析,得出天津市降雨量较为充足且集中在6、7、8三个月份,初期径流雨水污染较为严重(路面SS和COD浓度分别为235 mg/L和131 mg/L,屋面SS和COD浓度分别为72 mg/L和53 mg/L),但经弃流初期雨水后的雨水水质较好(路面SS和COD浓度分别为93 mg/L和57 mg/L,屋面SS和COD浓度分别为30 mg/L和21 mg/L),适合作为回用水水源。讨论了在天津市中心城区内具有代表性区域的雨水利用方案,老城区内宜采用小规模雨水利用装置;新建小区宜将雨水集蓄利用、渗透与园艺水景观等相结合;文化保护区内宜将雨水有组织的快速排除,在该区域外实施雨水利用工程;公园、广场可作为大型雨水储蓄池,在少雨季节时,作为回用水水源。 Water scarcity has become a global problem. As a precious resource, urban rainwater has become an important water source in some countries and regions. Through the monitoring and analysis of the precipitation characteristics in Tianjin, we can conclude that the rainfall in Tianjin is more abundant and concentrated in the 6th, 7th and 8th months. The initial runoff rainwater pollution is more serious (the SS and COD concentrations of the road are 235 mg / L and 131 The concentration of SS and COD in the roof was 72 mg / L and 53 mg / L, respectively. However, after the initial rainfall, the rainwater quality was better (the SS and COD concentrations of the road surface were 93 mg / L and 57 mg / L, SS and COD concentrations on the roof are 30 mg / L and 21 mg / L, respectively), which is suitable as a water source for reuse. Discussed in the central city of Tianjin, a representative area of ​​the rainwater use of the program, the old city should adopt a small-scale rainwater utilization devices; new plot should rainwater collection and utilization, infiltration and horticultural water landscape combined; cultural preservation zone Rainwater should be quickly and organically removed and rainwater utilization projects should be carried out outside the area. Parks and plazas can be used as large-scale rainwater storage reservoirs and as a source of water for reuse in low-rainfall seasons.