Simulation of Soil Water Movement under Intermittent and Continuous Irrigation
Zhang Kemen · Journal of Irrigation and Drainage · 2015
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.