基于HYDRUS模型不同灌水模式下土壤水盐运移模拟  

Study on water and salt transportation of different irrigation modes by the simulation of HYDRUS model

作　　者：余根坚[1] 黄介生[1] 高占义[2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点试验室,湖北武汉430072 [2]中国水利水电科学研究院,北京100038

出　　处：《水利学报》2013年第7期826-834,共9页Journal of Hydraulic Engineering

基　　金：科技部国际科技合作项目(2009DFA71850)

摘　　要：以田间试验为基础,应用饱和-非饱和土壤水分及溶质运动理论,利用HYDRUS-1D/2D数值模型对内蒙古河套灌区不同灌水模式下土壤水分、盐分运移规律进行数值模拟,分析了不同灌溉条件下的水盐运移状态,并将模拟结果与田间试验实测结果进行对比分析。研究结果表明,在相同灌水定额下,100cm土体内沟灌条件下生育期土壤盐分含量平均值比畦灌条件下土壤盐分含量平均值降低24.4%,沟灌可以有效控制土壤盐分的累积。利用HYDRUS模型对土壤水盐运移的模拟结果能够为灌区的水盐管理提供科学依据。In accordance with the saturatedunsaturated soil water movement and solute transportation theo ries and based on the field experiments, the transport of soil water and solute of different irrigation modes in Hetao Irrigation District were simulated by HYDRUS1D/2D model. Characteristics of the water flow and salt transport of different irrigation modes were analyzed. The model has been verified using the data of field experiments. The results show that under the same quota of irrigation, the effect of salt control of fur row irrigation is better than that of border irrigation. In soil layers of 100cm, the mean value of the soil salt contents in growth stage through furrow irrigation is 24.4% lower than that of border irrigation. Verifica tion using the experiment data indicates that HYDRUS model has a high precision for the simulation of wa ter and salt transportation, and the results can serve as a scientific basis for regional water and salt man agement.

关 键 词：河套灌区 灌水模式 水盐运移 数值模拟 

分 类 号：S152.7[农业科学—土壤学]