In the map, we can see the hydrogeological map of Tianjin city and the section map of the specified section. The scale of the map is 1:600000.The descriptive datas of the map are water bearing rock group and its water rich degree, the mineralization degree of groundwater, representative water points and various boundaries,etc.

1.Aquiferous rock group and its water richness

(1) Loose rock-like interstitial water-bearing rock group

(2) Clastic rock void fracture water-bearing rock group

(3) Carbonate rock fractured karst aquifer group

(4) Magmatic rock type fractured water-bearing rock group

2.Groundwater mineralization

3.Representative water points

4.Various boundaries and other