摘要
利用HYDRUS-3D模型对室内试验条件下微咸水膜孔沟灌水盐分布进行数值模拟，结果表明HYDRUS-3D模型模拟膜孔沟灌入渗过程的可靠性较高。在此基础上，通过模型模拟，对不同方案下的水盐运移规律进行探索，结果表明：当灌水量为450～900m3／hm2时，3％、6％和9％开孔率下的脱盐率均在46％以上，短期内达到0～40cm土层内压盐的效果，可为花生的生长提供良好环境。为达到节水、压盐的效果，膜孔沟灌条件下的灌水量不宜小于300m3／hm2。
As the starting point to the research of water-salt transport rules under the condition of film hole furrow irrigation, water-sah distribution under brackish water film hole furrow irrigation was studied systematically by experimental observation and numerical simulation. Infiltration of film hole furrow irrigation under the condition of laboratory test was simulated with HYDRUS- 3D model. Using HYDRUS- 3D model to simulate the infiltration of film hole furrow irrigation was a method with relatively higher reliability. Simulation scenarios with three holed ratios and four irrigation water amount levels were designed on this basis. The water-sah transport rules of different simulation scenarios were explored, so as to provide reference for the design of film hole furrow irrigation. Simulation results showed that when irrigation amount changed from 450 m^3/hm^2 to 900 m^3/hm^2 , the soil salt in 0 -40 cm soil depth could be restrained in a short time, and the salt rejection rate of 3% , 6% and 9% holed ratios were all above 46% , which could provide good environment for the growth of peanuts. Under the condition of film hole furrow irrigation, irrigation amount should not be less than 300 m^3/hm^2 for achieving the effects of economizing water and reducing salt content. The research results could both provide theoretical and technical basis for popularization and application of brackish water film hole furrow irrigation technology and provide reasonable soil secondary salinization prevention measures as well as scientific basis for watermanagement in the field.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2015年第2期137-145,共9页
Transactions of the Chinese Society for Agricultural Machinery
基金
'十二五'国家科技支撑计划资助项目(2012BAD08B05-4)
水利部科技推广计划资助项目(TG1204)
农业部公益性行业科研专项资助项目(200903001-05)
关键词
HYDRUS-3D模型
微咸水
膜孔沟灌
水盐分布
数值模拟
HYDRUS-3D model Brackish water Film hole furrow irrigation Water-salt distribution Numerical simulation
