龟裂碱土地下水年际动态变化特征研究

旨在为龟裂碱土改良利用水盐调控提供理论依据,本研究对龟裂碱土用绳测法测地下水埋深、电导率仪测定矿化度、多参数测试仪测定pH值和滴定法测定盐分离子,对比分析龟裂碱土地下水埋深、矿化度、pH值和盐分离子年际变化规律。结果表明：地下水埋深和矿化度横向变化较大,变异系数分别为22.2%和38.9%,盐分离子Na⁺、Cl^-和HCO₃^-横向变异较大,Ca²⁺和K⁺横向变异较小;地下水盐分离子主要以Na⁺、Cl^–、SO₄^2-和 HCO₃^-为主;地下水埋深逐年变浅,pH值、矿化度逐年变小。本研究结果为龟裂碱土改良利用水盐调控提供依据,以及对干旱地区的环境保护和农业灌溉具有重要的科学价值。

Interannual Dynamic Changes of Groundwater in Takyric Solonetz Land: Characteristics Study

In order to provide a theoretical basis for salt-water management of the takyric solonetz farmlands, in this study, the depth of groundwater was measured by rope method, mineralization was detected by conductivity meter, pH was determined by multi-parameter meter and salt ions were measured by titration method. The variation of the depth, mineralization and salt ion of groundwater of takyric solonetz farmlands were compared and analyzed. The results showed that the horizontal changes of the depth of groundwater and mineralization were great, and the variation coefficients were 22.2% and 38.9%, respectively. The horizontal variations of salt ion Na⁺, Cl^-, and HCO₃^- were relatively great, while Ca²⁺ and K⁺ had less variation. Groundwater salt ions were mainly Na⁺, Cl^–, SO₄^2- and HCO₃^-. Groundwater depth became shallow year by year, pH and mineralization became smaller year by year. These results provide a technical support for salt-water management of the takyric solonetz farmlands, and have important scientific value for environmental protection and agricultural irrigation in arid areas.