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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。
Aiming at the problem of secondary salinization and alkalization of soil in tender left lowland after Heilongjiang River diversion and expansion project, the formation conditions of secondary salinization in Nenzhu low plain are analyzed. It is pointed out that secondary salinization and infiltration of aeration zone The degree of groundwater salinity, groundwater salinity and groundwater depth are closely related. The DRAS-TIC method is used to give the scores and their weights. Then the SPSS software is used to construct the groundwater salinity and groundwater depth, Evaporation of the multiple linear regression equation, thus predicting the tender tender extension of the backbone of the first phase of operation in September 2015 Nensuo low ground at the groundwater salinity. The calculation formula of soil salinization and alkalization was established, and the susceptibility values of each monitoring point in September 2015 were calculated, and then the secondary salinization and alkalization of the soil were divided, One step to effectively prevent secondary salinization of soil laid the foundation.