数值模拟盐渍土盐分的季节变化

本文用数值模拟方法对土壤的盐分动态进行了周年的模拟计算.计算中考虑了盐分的沉淀与溶解,地下水位随时间变化等情况.计算结果表明:(1)数值模拟方法能反映季风区土壤盐分的季节变化;(2)雨季的集中降雨更有利于土壤脱盐;(3)地下水位的变化与气象因素的变化相配合影响着土壤水盐运动.

NUMERICAL SIMULATION OF SEASONAL CHANGES OF SOLUBLE SALTS IN SALT-AFFECTED SOIL

Numerical simulation method was used to study the transfer of soluble salts in soil.Evaporation and infiltration of water,precipitation and solution of salts in soil,and fluctuation in ground water table were considered in the computer simulation program.The simulated results of movement of salts over 9 months period showed that (1) this method can be use to simulae movement of salts in soil not only over short peiiod but also over one year;(2) more precipitation in rainy season than in other seasons is more favorable for salt leaching and desalination of soil;(3) the movement of salts in soil is affected by the changes of ground water table in combiantion evaporation and precipitation.