黑龙江引嫩扩建骨干工程运行后嫩左低平原次生盐碱化易发性预测

针对黑龙江引嫩扩建骨干工程运行后嫩左低平原土壤次生盐碱化易发程度问题,分析了嫩左低平原次生盐碱化的形成条件,指出次生盐碱化与包气带渗透性、地下水矿化度、地下水位埋深密切相关,参考DRAS-TIC方法给出了这三者的评分及其权重,进而利用SPSS软件构建地下水矿化度与地下水位埋深、大气降水量及蒸发量的多元线性回归方程,据此预测了引嫩扩建骨干一期工程运行后2015年9月嫩左低平原处的地下水矿化度。构建了嫩左低平原地区土壤次生盐碱化易发性计算公式,计算了2015年9月各监测点的易发性数值,进而划分出土壤次生盐碱化易发性分区,为下一步有效预防土壤次生盐碱化奠定了基础。

Susceptibility Prediction of Secondary Soil Salinization in Low Plain at the Left of Nenjiang after Operation of Nenjiang Water Diversion Project

For the problem of susceptibility of secondary soil salinization in low plain at the left of Nenjiang after operation of Nenjiang water diversion project, with analysis of formation conditions of secondary soil salinazation, it points out that secondary soil salinization is closely related with permeability of aeration zone, mineralization of groundwater and buried depth of groundwater level, which are scored and weighted by referring to DRASTIC method. Then multiple linear regression equation of groundwater salinity and buried depth of groundwater level, atmospheric precipitation, evaporation is established to predict mineralization of groundwater on September, 2015 with SPSS after the project running. The formulation of susceptibility of secondary soil salinization is built to calculate the susceptibility value for monitoring points on September, 2015. The susceptibility standard is given to divide susceptibility zonation of secondary soil salinization, which lays the foundation for effective prevention of secondary soil salinization.