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地下水临界深度是盐碱地区调控地下水位、设计排水工程的主要指标,也是灌区进行次生盐碱化预测预报、灌溉管理和拟订农业技术措施的重要依据,国内外都很重视对它的研究.五十年代和六十年代初期,较多的人都认为,临界深度(或叫安全深度)是土壤表层开始积盐的地下水最大埋深.此种释义涉及的只是土壤表层是否开始积盐,并未涉及积盐的速度和强度.而在新疆的自然状态下,地下水埋深即便在3或4米以下,
The critical depth of groundwater is the main index for controlling groundwater level in the saline-alkali region and designing the drainage project. It is also an important basis for secondary salinization prediction and forecasting, irrigation management and formulation of agricultural technology measures in irrigation areas, and much attention has been paid to its research at home and abroad. More people in the decade and early 1960s thought that the critical depth (or depth of safety) was the maximum groundwater depth at which the surface of the soil began to accumulate salt. This interpretation refers to whether the surface of the soil begins to accumulate salt or not Involving the speed and intensity of salt accumulation in the natural state of Xinjiang, groundwater depth even at 3 or 4 meters below,