环渤海河北地区地下水环境演化研究

环渤海河北地区，由于超量开采地下水，浅层地下水流场已经由天然状态演化为人工状态，在山前平原和中部平原表现得尤为明显；深层地下水流场已经由天然状态下向渤海汇集，演化为人工开采条件下的向漏斗中心汇集。浅层地下水水质演化总体上呈现出恶化的趋势，矿化度总体呈现上升状态。重碳酸型地下水的面积有所减少，氯化物型地下水和氯化物—硫酸型地下水的面积有所增长。深层地下水水质总体上基本保持稳定状态，但是在局部地段一些孔深小于300米的井中地下水矿化度有增大的趋势。

Evolution of the Groundwater Environment in the Hebei Sector of the Circum-Bohai-Sea Region

Based on the analysis of the large amount of collected data,the groundwater flow-field and chemical field in Hebei sector of the Circum-BoHai-Sea region are discussed. Because of over pumping the groundwater, the big exhaustion cones have been formed during the recent decades. Both the shallow and deep groundwater flow-fields have changed from natural state to man-made state. The natural groundwater has flowed to the center of the exhaustion cones instead of to the Bohai Sea. The quality of the shallow groundwater takes a worse trend. The areas with the bicarbonate-groundwater are decreasing, and with the chloride and chloride-vitriol groundwater are increasing. On the other hand, the quality of the deep groundwater is in the good state, except for the several wells less than 300 meters at some local places.