Sea water intrusion in coastal areas of Yellow Seaand Bohai Sea

This paper principally concentrates on the problems of sea water intrusion in the coastal areas ofYelfow Sea and Bohai Sea and some proposals for prevention and control of the Sea water intrusion. Sea waterintrusion is very heavy at some places of the coastal area along Yellow Sea and Bohai Sea. and it is extendingfast towards inland. It has caused underground water quality deterioration and short supply of fresh water atsome places. It has resulted in the decrease of land productive capacity, limited industrial development and hasdestroyed landscape ecology in this area. In order to prevent and control continual extension of sea water in-trusion in the area, several proposals, such as ecological agriculture and forestry, are suggested on the basis ofecological principle.