The analyze of the salt water intrusion in the Pearl Delta area responding with the climate variation in the near ten years

Since the 90´s of the last century, the salt water intrusion of the Pearl Delta area is becoming serious, especially the past ten years. From the 2005, the salt water intrusion has happened variation. The article analyses the variation by thirteen years´ chloric data of PingGang station, and finds the variation probably has relation with the El Nino and the landform of the river way.