摘要
分析了盐碱地改良传统冲洗模式的弊端,对土壤水的盐分运动进行了活塞流简化。取对称半田面,建立了基于淡化时间的分区灌水数学模型,通过室内试验对冲洗条件下的土壤水盐运动进行了模拟分析,最后利用试验数据求解分区灌水模型得到了盐碱地改良优化配水方案。结果表明,较之传统模式,分区灌水模式下水资源用量明显减少,二分区和三分区模式比较合理,并分别确定了这二种方案最佳的分区位置。
The shortage of traditional water supply model for saline land improvement is analyzed, the solute transport in soil water is simplified as plug flow, and the mathematical model of dividing irrigation which based on the desalination time, with only a half of the symmetrical field taken into account, is established in this study. Then the analysis of the movement of water and soil under the condition of salt displacement through indoor experiment is carried out, in order to achieve the optimum water supply scheme for saline land improvement by using the experiment data. The results indicate that, compared to traditional models, the water supply is significantly reduced under the dividing model, with the two-division and three-division model are the most reasonable ones, and the optimum locations of the division are also solved in the study.
出处
《灌溉排水学报》
CSCD
北大核心
2009年第1期97-100,共4页
Journal of Irrigation and Drainage
基金
武汉大学"国家大学生创新性实验项目"(2006033)
关键词
盐碱地改良
淡化时间
分区冲洗
明沟排水
优化配水模式
saline land improvement
desalination time
dividing irrigation
ditch drainage
optimizationmodel of water supply