Present Situation And Prediction Of Seawater Intrusion In Coastal Region Of Tangshan

Coastal area of Tangshan is an important part of Tangshan city. With the development of society, the groundwater of Tangshan coastal area has been over exploited for a long-time and the hazard of seawater intrution appeared and aggravated. By studying the hydrogeology and engineering geology condition of Tangshan coastal area, according to the monitor data of groundwater in Tangshan coastal area, firstly, chosing ( SAR ),Cl ?,SO 42?,M as standards, using Fuzzy mathatics integrated evaluation, the areas of seawater intrution ofâ… ,â…¡,â…¢,â…£are 347.8km2, 997.0km2, 600.1km2, 1309.9km2 in 2005. Then the mathematical model GM (1,1) of seawater intrution in Tangshan coastal area has been established. On the basis of model of seawater intrution, the seawater intrution in coastal area of Tangshan can be forecasted. Under the current exploitation situation, the areas of seawater intrution ofâ… ,â…¡,â…¢,â…£will be 365.8km2, 1026.3km2, 653.2km2, 1356.6km2 in 2010; the areas of seawater intrution ofâ… ,â…¡,â…¢,â…£will be 378.6km2, 1075.5km2, 689.7km2, 1402.6km2 in 2015. Analyzing the forecast data of seawater intrution, this paper study the tendency of seawater intrution hazard, and according to special condition of Tangshan coastal area, optimal project of the groundwater exploitation, reasonable countermeasures of prevention are established.