负压渗管对土壤盐分淋洗效果影响的模拟研究
负压渗管对土壤盐分淋洗效果影响的模拟研究
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LU Peirong , YANG, Yujie , XIA Congxuan , LIU, Yaxin and WANG, Ce
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Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
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Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
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【目的】探究土壤淋洗过程中负压多孔渗管的出流机制及其对土壤水盐运移的影响特征。【方法】采用HYDRUS模型对埋设真空负压渗管的土壤剖面进行数值建模，模拟淋洗过程中不同土壤质地（粉质黏土、黏土、黏壤土、砂质黏壤土、砂壤土）、土表入渗水头（2、4、6、8、10 cm）和渗管内负压水头（200、500、1 000、1 500、2 000 cm）组合情景下土壤水盐动态形式，并分析淋洗前后土壤脱盐率以及单位灌水对应的渗管排盐量。【结果】①负压渗管的排水主要源于下渗水在土壤剖面内形成的悬着水带，当悬着水带含水率达到饱和时排水通量达到最大。②负压渗管下土壤质地对负压渗管的排水排盐效果起决定作用，砂粒占比越高对应的脱盐效率和淋洗效率越高。③各处理的脱盐率与入渗水头和管内负压均呈微弱的正相关，但在砂质黏壤土和...
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负压渗管对土壤盐分淋洗效果影响的模拟研究
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TN_cdi_proquest_journals_3134064419
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https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_proquest_journals_3134064419
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1672-3317
DOI
10.13522/j.cnki.ggps.2024061
