Tianjin lies in downstream of Haihe river valley,75 percent quality of water ofwhole valley afflux into Bohai ocean by Tianjin,and water is especial relation toTianjin.

• 天津市地处海河流域的尾闾,特殊的地理位置和自然条件,决定了天津市与水休戚相关,流域75%25以上的暴雨洪水均需经天津市泄入渤海。