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土壤盐渍化是由于土壤水的迅速蒸发,矿化地下水源源不断补给所引起.地下水补给的强弱,影响到土壤的积盐速度和程度,而土壤水分的运动形式则又决定着土壤的积盐与否.在同一土质条件下,地下水的补给强度取决于地下水埋深和表层土壤水分的蒸发速度.而土壤水分的蒸发又与土壤含水量和外界蒸发力(水面蒸发、温度、风速、湿度等)有关.为研究地下水临界深度,需先探明这些因素之间的相互关系.本文拟在论述这种关系的基础上,提出本地区土壤几种主要质地的地下水临界深度)和土壤开始强烈返盐的地下水埋深.
Soil salinization is caused by the rapid evaporation of soil water and the continuous replenishment of mineralized groundwater.The strength and intensity of groundwater recharge affect the rate and extent of salt accumulation in soil while the motion of soil moisture determines the product of soil Salt or not.Under the same soil conditions, the recharge intensity of groundwater depends on the groundwater depth and evaporation rate of surface soil moisture, which in turn is related to soil water content and external evaporation (surface evaporation, temperature, wind speed, humidity Etc.) In order to study the critical depth of groundwater, we first need to find out the interrelationship between these factors.This paper intends to discuss the relationship based on the proposed groundwater critical depth of several main soils in the region) Return salt groundwater depth.