江苏沿海平原拟建水库咸化趋势分析

Analysis of the Salinization Risk in Planned Reservoir in Jiangsu Coastal Plain

为分析江苏沿海拟建平原水库建设后的咸化风险，于2013年4月，在江苏沿海1#、2#、3#、4#拟建水库取0～200cm原装土样，通过对样品氯离子含量和释放速率的测定，建立水质模型，预测不同初始蓄水水质条件下水库成化风险，模拟结果表明：在模拟运行一年后，1#、2#拟建水库底泥盐分释放量小，来水水质较好，不会发生成化，可作为生活用水水源地；3#拟建水库底泥盐分释放量较大，一年后各条件下氯离子浓度均高于250mg／L，平均氯离子浓度涨幅为173．20％，成化风险较高，不适合作为生活用水水源地；4#拟建水库在各条件下氯离子浓度平均上升6．83mg／L，因此当蓄水水源良好时可以作为生活用水水源地。

Aiming at analyzing the risk of planned plain reservoir salinization at Jiangsu coast, this study get the original soil sample from 0 to 200cm depth of the 1# , 2# , 3# , 4# reservoirs in April 2013. By testing the content and release rate of chloride ion, we built the water quality model to predict the risk of reservoir salinization under different storage conditions. And the simulation result shows that after one year simulation operation, the chloride concentration of sediment released from 1#, 2# reservoir is small, the water is good and will not be salinized and can be used as drinking water source. The chloride concentration of sediment released from 3# reservoir is so much that the chloride concentration is higher than 250mg/L under all conditions. And the average chloride amount of increase is 173. 20%, it has high risk of salinization, which make it improper to be water source. The average chloride amount of increase of 4# reservoir is 6. 83mg/L. Therefore, it can be use as drinking-water source.