灌溉优先流对裂隙分布密度、灌水强度及土壤湿度的响应机理
灌溉优先流对裂隙分布密度、灌水强度及土壤湿度的响应机理
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DUAN Fengyi , ZHU Chengli , WANG, Ce , CHEN, Yu and MA, Liang
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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】研究土壤初始含水率（土壤湿度）、裂隙分布密度及灌水强度对裂隙优先流强度的影响机理。【方法】构建基于水量平衡原理的优先流双域渗透模型，并通过染色示踪试验进行物理模拟及模型验证，基于模型数值模拟了裂隙分布密度、初始含水率和灌水强度三维因素旋转组合下的优先流特征。【结果】试验区的浅小型裂隙（裂隙平均宽度0.2 cm≤wc≤1.0 cm，平均深度0.5 cm≤d≤10 cm）与优先流的发育无直接联系，宽深型裂隙（裂隙平均宽度wc≥2 cm，平均深度d≥50 cm）是产生裂隙优先流的主要原因；宽深型裂隙分布密度增大，基质流深度、染色面积率以及灌水均匀度增加；模型对裂隙优先流的模拟效果较好（R2=0.951，P＜0.01）；模拟结果显示，裂隙深度很大程度上决定了优先流的最大入渗深度；接近土壤饱和...
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灌溉优先流对裂隙分布密度、灌水强度及土壤湿度的响应机理
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TN_cdi_wanfang_journals_ggps202302005
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https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_wanfang_journals_ggps202302005
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1672-3317
DOI
10.13522/j.cnki.ggps.2022263
