红壤多点源滴灌不同间距条件下湿润锋推移特性研究  

Study on characteristics of wetted front movement under differentspacing of multi-point source drip irrigation in red soil

作　　者：裴青宝 廖振棋[2] 余雷 黄健全[3] PEI Qingbao;LIAO Zhenqi;YU Lei;HUANG Jianquan(Jiangxi Provincial Institute of Water Sciences,Nanchang 330029,China;National and Provincial Joint Engineering Laboratory for the Hydraulic Engineering Safety and Efficient Utilization of Water Resources of Poyang Lake Basin,Nanchang 330099,China;The First Engineering Co.Ltd.,Gezhouba Group,Yichang 443002,China)

机构地区：[1]江西省水利科学研究院,江西南昌330029 [2]南昌工程学院鄱阳湖流域水工程安全与资源高效利用国家地方联合工程实验室,江西南昌330099 [3]中国葛洲坝集团第一工程有限公司,湖北宜昌443002

出　　处：《南昌工程学院学报》2020年第1期42-47,共6页Journal of Nanchang Institute of Technology

基　　金：江西省水利厅科技项目(201821ZDKT13);江西省科技厅重点研发计划项目(20151BBF60012,20077BBF60060)。

摘　　要：为了研究红壤多点源滴灌不同间距条件下湿润锋的推移特性,在江西省赣州市寻乌县澄江镇赣南脐橙种植示范基地进行双点源滴灌入渗试验,双点源滴灌滴头间距分别为20 cm、40 cm和60 cm,对湿润锋运移情况、交汇时间、交汇面积进行研究试验。数据表明:水平湿润锋最大运移距离和垂向湿润锋最大运移距离与灌水历时之间有着紧密的多项式关系。还发现双点源滴灌入渗条件下交汇作用、滴头流量、滴头间距对湿润锋运移特性均有一定的影响。滴头间距对水平和垂向湿润锋扩散速率影响不大,但双点源滴灌交汇入渗条件下的水平湿润锋交汇面积与水平湿润锋总面积的百分比随着滴头间距的增大先增长再减小。并且增大滴头流量、灌水历时及保持双点源滴头间距为20~40 cm均能有效改善土壤湿润体的均匀性和有利于湿润锋运移。In order to study the characteristics of wetted front under different spacing conditions of multi-point source drip irrigation in red soil,the two-point source drip irrigation infiltration test was carried out at Chengjiang Town,Ganzhou City,Jiangxi Province.The drip spacing of two-point source drip irrigation was 20cm,40cm,and 60cm,respectively.The wetted front movement and intersection time,and the intersection area are studied and tested.The data show that the maximum migration distance of horizontal wetted front and the maximum migration distance of vertical wetted front have obvious polynomial relation with infiltration time.It was also found that under the condition of two-point source drip irrigation,the intersection effect,the dripper flow rate,and the drop spacing on the wetted front movement characteristics were also found.The drop spacing has little effect on the diffusion rate of horizontal and vertical wetted front.However,the percentage of the intersection area of horizontal wetted front and the total area of horizontal wetted front increased first and then decreased with the increase of dripping distance under the condition of two-point source drip irrigation interference infiltration.Increasing dripper flow duration of irrigation and keeping the distance between two-point source dripper as 20~40cm can effectively improve the uniformity of soil wetting body and benefit the wetted front movement.

关 键 词：双点源滴灌 交汇入渗 湿润锋 滴头间距 土壤水分运动 

分 类 号：S275.6[农业科学—农业水土工程]