间歇和连续灌溉土壤水分运动的模拟研究  

Simulation of Soil Water Movement under Intermittent and Continuous Irrigation

作　　者：张珂萌 牛文全[1,2] 薛万来[2,3] 张子卓[1,2] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]西北农林科技大学水土保持研究所,陕西杨凌712100 [3]北京市水科学技术研究院,北京100048

出　　处：《灌溉排水学报》2015年第3期11-16,共6页Journal of Irrigation and Drainage

基　　金：国家高技术研究发展计划(863计划)项目(2011AA100507);高等学校学科创新引智计划项目(B12007)

摘　　要：为探明间歇灌溉与连续灌溉过程中土壤水分运动和分布的异同,利用Hydrus-2D软件模拟了地下滴灌和微润灌灌水方式下土壤水分的运动状态。结果表明,在垂直距离滴灌带和微润带5cm处,湿润土壤含水率和水势均基本呈对称分布;灌水15.4h后,地下滴灌条件下垂直向下的土壤水分传输量大于垂直向上的,而微润灌条件下土壤含水率和水势仍呈对称分布;当灌水量相同时,微润灌的湿润面积略大于地下滴灌;地下滴灌饱和含水区域占湿润面积的比值为15.3%,大于微润灌饱和含水区域的占比(12.9%);微润灌湿润土壤水分分布均匀度达81%,大于地下滴灌。In order to investigate the process of soil water movement and soil water distributions under intermittent irrigation and continuous irrigation,Hydrus-2Dsoftware was used to simulate soil water movement under SDI（subsurface drip irrigation）and MI（moisture-irrigation）.The results showed that：at the vertical distance of 5cm from drip tape and moisture-irrigation tape,the distributions of soil water content and soil water potential were symmetrical under SDI and MI;After irrigation for 15.4h,soil water content transmission under SDI at straight down was greater than that at the vertical up,while soil water content and soil water potential continued to show a symmetrical distribution under MI;At the same amount of irrigation,the humid area under MI was slightly larger than the area of SDI;Under SDI,the ratio of saturated aqueous region in the area of wet accounted for 15.3%,and was higher than that under MI（12.9%）;Under MI,the uniformity of soil water distribution was 81%,which was higher than that under SDI.

关 键 词：地下滴灌 微润灌 Hydrus-2D 土壤含水率 土水势 

分 类 号：S152.7[农业科学—土壤学]