Study on infiltration of Tianjin river systems in different typical years based on mapinfo

The capital water resources of Tianjin is only 160m³ , so Tianjin belongs to a city with shortage of water resource. With the rapid development of the city, the crisis of resource shortage is more and more grave, so it is much more important to fully use the water resource of infiltration of Tianjin river systems which are part of 19 one-level river. Based on the feature of rivers, 45 equalization areas are classified in research area. Mapinfo with powerful SQL function was applied to calculate accretion infiltration of Tianjin river systems and analysis the regulation of distribution, and then we concluded that the area of the preference water quality was in the north of Tianjin and the large salinity water was in the coastal area.