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非饱和土中溶质地表径流迁移模型及解析模拟

童菊秀,  杨金忠,  暴入超

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文章导航 > 水科学进展  > 2009 >  20(1): 10-17
童菊秀, 杨金忠, 暴入超. 非饱和土中溶质地表径流迁移模型及解析模拟[J]. 水科学进展, 2009, 20(1): 10-17.
引用本文: 童菊秀, 杨金忠, 暴入超. 非饱和土中溶质地表径流迁移模型及解析模拟[J]. 水科学进展, 2009, 20(1): 10-17.
shu
TONG Ju-xiu, YANG Jin-zhong, BAO Ru-chao. Model for chemicals transfer to surface runoff in unsaturated soil and its analytical modeling[J]. Advances in Water Science, 2009, 20(1): 10-17.
Citation: TONG Ju-xiu, YANG Jin-zhong, BAO Ru-chao. Model for chemicals transfer to surface runoff in unsaturated soil and its analytical modeling[J]. Advances in Water Science, 2009, 20(1): 10-17.
shu

非饱和土中溶质地表径流迁移模型及解析模拟

  • 武汉大学水资源与水电工程科学国家重点实验室, 湖北, 武汉, 430072

基金项目: 国家自然科学基金重点资助项目(50639040);国家高技术研究发展计划(863)资助项目(2006AA100205;2006AA100207)
详细信息
    作者简介:

    童菊秀(1981- ),女,湖北武汉人,博士研究生,主要从事地下水、土壤水运动理论及水资源研究.E-mail:tongjx111@163.com

  • 中图分类号: P641.2

Model for chemicals transfer to surface runoff in unsaturated soil and its analytical modeling

  • State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University, Wuhan 430072, China

Funds: The study is financially supported by the National Natural Science Foundation of China.(No.50639040) and the National High Technology Rescarch and Development Program of China (No.2006AA100205 and 2006AA100207)

  • 摘要: 针对非饱和农田在降雨引起肥料溶质地表径流迁移流失的实际问题,建立了二层结构溶质地表径流迁移模型,根据溶质质量守恒定律和水量平衡原理,求得模型的解析解,并采用室内非饱和土壤实验验证解析模型的合理性。通过敏感性分析,探讨了模型参数和土壤物理参数对溶质地表径流迁移流失过程的影响。研究结果表明:非饱和土的吸附性增大将增强土壤溶质迁移流失到地表径流水的能力;土壤干容重增大将减少土壤溶质的地表径流迁移;土壤的初始体积含水率越高,土壤溶质的地表径流运移作用越强。
    Abstract: There exists ponding water during rainfall or irrigation inducing runoff into the unsaturated soil of farmland,and the soil chemical is lost into the surface runoff.A two-layer system model is established to describe the chemical transfer to surface runoff.An analytical solution for the model is obtained based on the chemical conservation laws and water balance equations,and the unsaturated soil experiment shows that this two-layer analytical model is reliable and reasonable.The effects of various soil properties on the chemical transfer to surface runoff are discussed by sensitive analysis of some parameters of the unsaturated soil in the model and experiments.It is found that higher adsorptivity of unsaturated soil will reinforce the ability of the soil chemical transfer to surface runoff,but the soil with greater bulk density decreases and higher initial volumetric water content of soil increases the soil chemical transfer to surface runoff.
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出版历程
  • 收稿日期:  2008-01-16
  • 刊出日期:  2009-01-25

非饱和土中溶质地表径流迁移模型及解析模拟

  • 武汉大学水资源与水电工程科学国家重点实验室, 湖北, 武汉, 430072
    • 基金项目:  国家自然科学基金重点资助项目(50639040);国家高技术研究发展计划(863)资助项目(2006AA100205;2006AA100207)
    作者简介:

    童菊秀(1981- ),女,湖北武汉人,博士研究生,主要从事地下水、土壤水运动理论及水资源研究.E-mail:tongjx111@163.com

  • 收稿日期: 2008-01-16
  • 刊出日期: 2009-01-25

  • 中图分类号: P641.2

摘要: 针对非饱和农田在降雨引起肥料溶质地表径流迁移流失的实际问题,建立了二层结构溶质地表径流迁移模型,根据溶质质量守恒定律和水量平衡原理,求得模型的解析解,并采用室内非饱和土壤实验验证解析模型的合理性。通过敏感性分析,探讨了模型参数和土壤物理参数对溶质地表径流迁移流失过程的影响。研究结果表明:非饱和土的吸附性增大将增强土壤溶质迁移流失到地表径流水的能力;土壤干容重增大将减少土壤溶质的地表径流迁移;土壤的初始体积含水率越高,土壤溶质的地表径流运移作用越强。

English Abstract

童菊秀, 杨金忠, 暴入超. 非饱和土中溶质地表径流迁移模型及解析模拟[J]. 水科学进展, 2009, 20(1): 10-17.
引用本文: 童菊秀, 杨金忠, 暴入超. 非饱和土中溶质地表径流迁移模型及解析模拟[J]. 水科学进展, 2009, 20(1): 10-17.
shu
TONG Ju-xiu, YANG Jin-zhong, BAO Ru-chao. Model for chemicals transfer to surface runoff in unsaturated soil and its analytical modeling[J]. Advances in Water Science, 2009, 20(1): 10-17.
Citation: TONG Ju-xiu, YANG Jin-zhong, BAO Ru-chao. Model for chemicals transfer to surface runoff in unsaturated soil and its analytical modeling[J]. Advances in Water Science, 2009, 20(1): 10-17.
shu

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