滦河入海口三角洲地区地下水及土壤盐度分析

Analysis of groundwater and soil salinity in delta region of Luanhe River estuary

为了解滦河入海口三角洲地区地下水盐度及土壤盐渍化情况,对该区域进行了地下取水、取土测试。共布置17个浅层地下水取样点、53个深层地下水取样点及20个土壤取样点,测试水样的TDS及土壤中水溶盐的易溶盐总量,K^+,Na^+,Ca^(2+),Mg^(2+),Cl^-,SO_4^(2-),HCO_3^-,CO_3^(2-)。研究结果表明:研究区范围内淡水区域占总研究区域的50%;深层地下水TDS差异较小,且均为淡水;盐渍土类型多为氯盐渍土和亚氯盐渍土;土壤易溶盐总量整体上在各个深度处由西北向东南逐渐增加,土壤盐度的影响因素是浅层地下水;土壤易溶盐含量在局部(位置)较低。研究结果可为地下水资源及土壤资源开发利用提供一定参考。

In order to understand the situation of groundwater salinity and soil salinization in the delta region of the Luanhe River estuary, we took a large number of underground water and soil samples including 17 shallow groundwater sampling points, 53 deep groundwater sampling points and 20 soil sampling points to measure the TDS of water samples and the total amount of sol-uble salt, K ＋ , Na＋ , Ca2 ＋ , Mg2 ＋ , Cl , SO! , H C 0 3 and CO3 in soil samples. The results show that the area of freshwater accounts for half of the overall study area; deep groundwater are freshwater with very little difference in TDS; both chlorine and sub - chlorine saline soil are the major types of salinized soil; the total amount of soluble salt gradually increases from northwest to southeast at various depths, and soil salinity is affected by shallow groundwater; the content of soluble salt in some area is rath-er low due to paddy field irrigation. This study bears certain significance to provide guidance for the exploitation and utilization of underground water and soil resources.