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根据现场监测资料,对辽东湾西侧绥中砂质平原土壤盐渍化特征进行了分析。监测区含水层主要是由较粗的透水性较好砂砾石等粗颗粒物质组成,由于地下水的过度开采,海水入侵严重,海水入侵带入的可溶性盐在土层中积蓄,使土层产生不同程度的盐渍化,其盐渍化最显著的地段在大渔场(SL1孔)区段,距海岸最近;受季节性降水的影响,盐渍化的类型和分布也不同,平水期主要是硫酸盐-氯化物型的轻盐渍化土,主要集中在1.5 m层位;丰水期土壤盐渍化较轻,在1.5 m处有氯化物型轻盐渍化土分布,各离子含量明显降低,HCO-3含量高,Cl-含量最低;枯水期分布层位主要在2.0 m以下,主要是硫酸盐-氯化物型和氯化物型中盐渍化土,各离子含量从表层向下部增高,阴离子HCO-3含量最高,Na+与HCO-3曲线分布较一致。
According to the field monitoring data, the salinization characteristics of the soil in the Suizhong sandy plains on the west side of Liaodong Bay were analyzed. The aquifers in the monitoring area are mainly composed of coarser, coarsely permeable fine gravel and other coarse particulate matter. Due to the excessive exploitation of groundwater, seawater intrusion is serious and soluble salts brought by seawater intrusion accumulate in the soil layer and cause soil layers to be different Salinization, the salinization of the most significant section in the large fishing grounds (SL1 hole) section, away from the coast; by the seasonal precipitation, the type and distribution of salinization is also different, the flat water is mainly sulfuric acid Salt-chlorinated light salinized soil mainly concentrated in the 1.5 m horizon. Soil salinization was relatively mild in the wet season, with a distribution of chloride-type light salinization soil at 1.5 m and a significant decrease in the contents of various ions , The content of HCO-3 is the highest and the content of Cl- is the lowest. The distribution horizon in the dry season is mainly below 2.0 m, mainly in the sulphate-chloride and chloride-type salinized soils. The content of each ion increases from the surface to the bottom, HCO-3 content highest, Na + and HCO-3 curve more consistent.