排灌机械工程学报2024，Vol.42Issue(2)：161-169,9.DOI:10.3969/j.issn.1674-8530.23.0196
裂隙影响下的微润灌水分运移和分布规律
Water migration and distribution rules of moistube irrigation under influence of cracks
摘要
Abstract
In order to study the influence of crack development on water migration and distribution characteristics of moistube irrigation,an indoor soil box water infiltration test was conducted.Through artificial cracks,different crack spacing(6 and 8 cm)and crack depths(5,10 and 15 cm)were set up.At the same time,the no crack treatment(CK)was used as a control to measure the changes in infiltration amount and morphological evolution of wetting bodies and water distribution characteristics at the end of infiltration.The results show that cracks have basically no effect on the water infiltration rate of moistube irrigation.The cumulative infiltration amount between treatments has a similar trend with the infiltration time,and the final cumulative infiltration amount is not significantly different.The cracks change the morphological evolution and water distribution characteristics of the wetting body.Af-ter the wetting front reaches the crack area,under the influence of the capillary barrier effect of the crack,the horizontal movement of water is inhibited and the upward movement is strengthened.Even-tually,the upper part of the wetting body is approximately rectangular and the lower part is approxi-mately elliptical,and the moisture distribution in the profile shows finger-like characteristics.The crack depth has a significant impact on the regularity of the wetting body,the upward migration dis-tance of the wetting front,as well as the uniformity of water distribution after irrigation,while the im-pact of the crack spacing is not significant.Compared with CK,when the crack depth is 15 cm,the dispersion of the wetting body increases by about 34.5%,the final upward migration distance of the wetting front increases by about 12.9%,and the moisture distribution uniformity decreases by about 27.5%.In the practical implementation of moistube irrigation,it is essential to carefully manage the depth of cracks in the field to mitigate any negative consequences.关键词
微润灌/土壤裂隙/水分入渗/湿润体/水分分布Key words
moistube irrigation/soil cracks/water infiltration/wetting body/water distribution分类
农业科技引用本文复制引用
齐伟,和玉璞,纪仁婧,麦紫君,王策,江晓星..裂隙影响下的微润灌水分运移和分布规律[J].排灌机械工程学报,2024,42(2):161-169,9.基金项目
中央级公益性科研院所基本科研业务费专项资金资助项目(Y923001,Y923003) （Y923001,Y923003）
国家自然科学基金资助项目(52109053,51879071) （52109053,51879071）
江苏省自然科学基金资助项目(BK20230126) （BK20230126）
江苏省水利科技项目(2021052,2023030) （2021052,2023030）
水利部数字孪生流域重点实验室开放研究基金资助项目(Z0202042022) （Z0202042022）
