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当今在土壤改良水文地质工作中,许多学者根据各种特定的自然地理,水文地质条件,都相应提出一个临界深度值,它在防治土壤次生盐渍化,控制地下水在一定深度范围内,作为拟定排水渠沟深度和间距的重要依据,而且也是在西北地区开展竖井排灌和调控地下水处于最佳深度的技术指标。 临界深度的确切涵义近来有人提出:“在一年中地面蒸发最强烈
Nowadays, in the process of soil improvement hydrogeology, many scholars put forward a critical depth value correspondingly to various specific geophysical and hydrogeological conditions. It is of great significance in preventing and controlling soil secondary salinization and controlling groundwater within a certain depth range. Drafting the depth and spacing of drainage ditch an important basis, but also in the northwestern region to carry out vertical well irrigation and drainage and regulation of groundwater at the best technical indicators. The exact meaning of the critical depth Recently, it was suggested: "In the year the ground is the most intense evaporation