基于HYDRUS-2D模型膜下滴灌棉田不同上口宽排盐浅沟下土壤水盐运移模拟
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摘要
本文以膜下滴灌棉田土壤水盐运移为研究对象,根据室内试验参数及田间测坑试验在HYDRUS-2D中建立模型,利用实测值与模型模拟值进行对比,调整模型参数,确定建立模型的准确性。根据已有的模型,对不同上口宽排盐浅沟的排盐问题进行研究,研究生育期膜下滴灌棉田不同深度盐分和水分的变化情况,分析模拟结果对比不同排盐沟的上口宽对土壤排盐效果的影响。为合理制定土壤排盐模式,减少和改良土壤次生盐渍化提供科学的理论依据。
The soil water and salt transport in drip irrigation cotton field under plastic film was taken for the research. The HYDRUS-2 D model was established basis on the field experiment. The measured values were compared with the simulated values of the model, and the model parameters were adjusted. Determine the accuracy of modeling. According to the existing models, the problem of salt discharge in shallow ditch with different upper mouth width was studied, and the changes of salt and water content in different depths of drip irrigation cotton field under plastic film during the cultivation period were studied. The effects of upper mouth width of different salt discharge ditch on soil salt removal efficiency were analyzed and compared. It provides a scientific theoretical basis for reasonably formulating the model of soil salt discharge and reducing and improving soil secondary salinization.
The soil water and salt transport in drip irrigation cotton field under plastic film was taken for the research. The HYDRUS-2 D model was established basis on the field experiment. The measured values were compared with the simulated values of the model, and the model parameters were adjusted. Determine the accuracy of modeling. According to the existing models, the problem of salt discharge in shallow ditch with different upper mouth width was studied, and the changes of salt and water content in different depths of drip irrigation cotton field under plastic film during the cultivation period were studied. The effects of upper mouth width of different salt discharge ditch on soil salt removal efficiency were analyzed and compared. It provides a scientific theoretical basis for reasonably formulating the model of soil salt discharge and reducing and improving soil secondary salinization.
引文
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[2]陈献伟.节水灌溉中秋浇定额对土壤水盐变化的影响研究[J].水利科技与经济,2017,23(7):67-73.
[3]李显溦,左强,石建初,等.新疆膜下滴灌棉田暗管排盐的数值模拟与分析Ⅰ:模型与参数验证[J].水利学报,2016,47(4):537-544.
[4]李显溦,左强,石建初,等.新疆膜下滴灌棉田暗管排盐的数值模拟与分析Ⅱ:模型应用[J].水利学报,2016,47(5):616-625.
[5]周和平,王少丽,吴旭春.膜下滴灌微区环境对土壤水盐运移的影响[J].水科学进展,2014,25(6):816-824.
[6]张立新,周和平,朱焕丽.新疆土壤次生盐化主要成因及对策[J].中国土壤与肥料,2007(5):11-14.
[7]周和平,张立新,禹锋,等.我国盐碱地改良技术综述及展望[J].现代农业科技,2007(11):159-161,164.
[8]郎丹丽,鲁子伟.脱硫石膏在盐碱地的应用改良效果[J].现代园艺,2018(16):9-10.
[9]陈建,王文芬.滴灌条件下脱硫石膏对甘肃盐碱地的改良效果研究[J].节水灌溉,2018(5):35-38.
[10]汪立梅,桂丕,李化山,等.改良剂与微生物菌剂联合施用对盐碱地土壤和耐盐植物的影响[J].江苏农业科学,2018,46(17):264-269.
[11]涂超,戴玮.水动力学模拟模型在盐碱地改良中的应用[J].水利规划与设计,2018(9):28-30.
[12]Dirk Mallants,Jirka ■im■unek,Martinus Th.van Genuchten,et al.Simulating the Fate and Transport of Coal Seam Gas Chemicals in Variably-Saturated Soils Using HYDRUS[J/OL].water,2017,9(6):385[2018-03-10].https://www.mdpi.com/2073-4441/9/6/385.DOI:10.3390/w9060385.
[13]Jir∨í ■im■unek,Miroslav ■ejna,Martinus Th.van Genuchten.New Features of the Version 3of the HYDRUS(2D/3D)Computer Software Package[J].Journal of Hydrology and Hydromechanics,2018,66(2):133-142.
[14]Simunek J,M Th van Genuchten,M Sejna.HYDRUS:Model use,calibration and validation[J].Special issue on Standard/Engineering Procedures for Model Calibration and Validation,Transactions of the ASABE,2012,55(4),1261-1274.