摘要
微润灌是一种全新的低能耗节水灌溉技术,应用前景广阔。为了揭示微润管(带)埋深和压力水头交互效应对湿润锋的影响,采用室内试验,对不同管带埋深(D5、D15、D20)与压力水头(H100、H150、H200)条件下的土壤湿润锋进行了研究。结果表明:不同压力水头处理后的湿润锋沿各个方向的扩散速率表现为:H200>H150>H100。不同管带埋深处理后的湿润锋在竖直向上和水平方向的推移速度均表现为:D5>D20>D15,而竖直向下的推移速度表现为:D20>D15>D5。不同压力水头和埋深处理后的湿润锋半径大小表现为:H200>H150>H100,D5>D15>D20。埋深、压力水头及其耦合效应对Rmax的影响大小表现为:H>D>H·D,对湿润锋半径变化速率的影响大小表现为:H>H·D>D。
Moistube-irrigation is a new water-saving irrigation technique with low energy consumption and broad application prospects. To reveal the effects of tube depths （ DS, D15, D20） and pressure heads （ H100, H150, H200） on the wetted zone under moistube-irrigation, an indoor experiment was conducted. Results showed that the diffusion rates of wetted zone in any directions under different pressure heads were H200〉H150〉H100. The diffusion rates of the wetted zone in the vertical upward and the horizontal direction under different tube depths were： DS〉D20〉D15, whereas those in the downward direction were： D20〉D15〉DS. The radius of wetted zone under different tube depths and pressures head were： H200〉H150〉H100 and D5〉D15〉D20. The effects of individual factors and their interaction on the values of Rmax followed the descending order of H〉D〉H · D, whereas those on the change rate of wetted-zone radius followed the descending order of H〉 H · D〉D.
作者
毕远杰
雷涛
雷明杰
王坚
BI Yuan-jie;LEI Tao;LEI Ming-jie;WANG Jian(Shanxi Institute of Water Resources and Hydropower Research,Taiyuan 030002,China;College of Water Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《中国农村水利水电》
北大核心
2018年第10期114-117,共4页
China Rural Water and Hydropower
基金
国家自然科学基金项目(51209131)
山西省水利科学技术研究与推广项目(2014-2016)
关键词
微润灌
管带埋深
压力水头
入渗
moistube-irrigation
tube depth
pressure head
infiltration
