基于Hydrus-1D的土壤水盐运移数值模拟  

Numerical Simulation of the Transport of Soil Water and Solute Based on HYDRUS-1D

作　　者：李远[1,2] 郑旭荣[1,2] 王振华[1,2] 张金珠[1,2] 姜国军[1,2] 孟宪磊[3] 

机构地区：[1]石河子大学水利建筑工程学院 [2]现代节水灌溉兵团重点实验室 [3]总参谋部炮兵训练基地

出　　处：《中国农学通报》2014年第35期172-177,共6页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金项目(51369027;51169022);石河子大学杰青培育项目(2013ZRKXJQ02)

摘　　要：为了研究积水入渗土壤水盐运移规律,通过室内土柱实验,分析不同灌水量条件下土壤水盐分布状态。应用饱和-非饱和土壤水分及溶质运动理论构建数学模型,利用Hydrus-1D软件进行水盐运移数值模拟,并将模拟结果与实测结果进行对比分析。结果表明:灌水量为1.4 L、2.8 L、4.2 L处理的积盐区位置分别为20 cm、30 cm、40 cm,积盐区积盐率分别为49.2%、57.6%、100%,表层土脱盐率分别为87.2%、93.7%、96.8%;积盐区在湿润锋以上5 cm左右处。HYDRUS-1D模型可以较好对土壤水盐运移规律进行模拟。In order to study movement law of water and salt in soil, the author investigated the characteristics of the water flow and salt transport under different irrigation amount by the laboratory soil column experiments. In accordance with the saturated-unsaturated soil water movement and solute transportation theories, mathematical model was built and the transport of soil water and solute was simulated by HYDRUS- 1D to study the soil water and salt migration mechanism. The model was verified using the data of laboratory experiments. The results showed that with irrigation water of 1.4 L, 2.8 L and 4.2 L, salification zone depth were 20 cm, 30 cm and 40 cm, respectively, and the rate of accumulated salt was 49.2%, 57.6% and 100%, respectively. Desalinization ratio in the surface layer of soil was 87.2%, 93.7% and 96.8%, respectively. Safification zone depth was at above 5 cm the wetting front. The transport of soil water and solute could be better simulated by HYDRUS- 1D.

关 键 词：灌水量 水盐运移 数值模拟 HYDRUS 

分 类 号：S156.4[农业科学—土壤学]