滨州市典型平原引黄水库对周边土壤次生盐渍化的影响

Influence on the Secondary Salinization of the Surrounding Soil of Binzhou Typical Plain Yellow River Diversion Reservoir

为了解滨州市典型平原引黄水库对周边土壤次生盐渍化的影响,以思源湖和三角洼水库为例,采样测定了0~20cm、20~40cm、40~60cm、60~80cm不同剖面土壤Cl-、Na+等7种离子浓度。结果表明:土壤盐分化学型主要为Cl-Na型,且土壤底部离子总量均高于上层,表明未因为水库蓄水的原因,而出现周边土壤离子大量迁移到表层土的现象。土壤中Na+、Mg2+、K+、Cl-、SO2-4随水迁移,是造成周边50m范围内土壤出现轻微次生盐渍化的主因。思源湖水库周边土壤渗透性好,对周边土壤的影响程度要大于三角洼。总之,两个引黄水库对周边土壤盐渍化有轻微影响,但生态风险可控。

In order to find the influence of the typical plains Yellow River diversion reservoir on the surrounding soil＇s secondary salinization in Binzhou,with SanJiaoWa and Siyuan Lake reservoirs as example,the eight kinds of soil ions concentration distribution characteristics such as soil chlorine ion,sodium ion etc.,sampled from the different soil layers（0~20 cm,20~40 cm,40~60 cm,60~80 cm）are determined.The results show that the soil salt chemical type is Cl-Na,and the total ions content of the bottom soil is higher than the upper soil,which suggests that there is no obvious ions migration phenomenon occurrence from bottom soil to the surface soil because of the reservoirs＇ filling.The soil ions migration with the groundwater flow of sodium,magnesium,potassium,chloride,sulfate ions may be the primary reason of mild soil secondary salinization in the scope of 50 maround the reservoirs.On account of Siyuan Lake reservoir soil＇s good permeability,there is a greater influence on the surrounding soil＇s salinization concentration than SanJiaoWa reservoir surrounding soil.In brief,the construction of the Yellow River diversion reservoirs may put a slight effect on the surrounding soil＇s secondary salinization,but its eco-risk is controllable.