| 王少丽,瞿兴业.盐渍兼治的动态控制排水新理念与排水沟（管）间距计算方法探讨[J].水利学报,2008,39(11): |
| 盐渍兼治的动态控制排水新理念与排水沟（管）间距计算方法探讨 |
| Dynamic control of drainage and calculation method of drainage spacing based on the idea of combining the control of salinization with subsurface waterlogging |
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| DOI： |
| 中文关键词: 盐渍兼治 农田排水 动态控制 模糊档次 非稳定流 |
| 英文关键词: combined control of salinization and subsurface waterlogging farmland drainage dynamic control fuzzy grading method unsteady flow |
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| 中文摘要: |
| 根据灌区地下水位降落过程的不同阶段有不同控制要求这一特点，为充分发挥各级排水工程的综合控制能力，本文从北方易受盐渍危害的渠灌区实际出发，针对现有农田排水设计方法的局限性，提出以盐渍兼治为目标的地下水位分期动态控制指标的排水标准新理念，并用“模糊档次”分级方法近似处理隔水层深度，推导出计算组合排水沟（管）间距的非稳定流简化通式，对原有设计方法予以改进。通过实例验证表明，地下水位动态过程指标与实测结果吻合一致，计算间距的简化通式使用方便，其结果能满足设计精度要求。 |
| 英文摘要: |
| A new drainage standard according to the principle of dynamic controlling the groundwater table in farm land by stages is proposed. It is based on the idea of combining the control of salinization with subsurface waterlogging and aiming at the target of fully utilizing the comprehensive control capacity of various drainage measures. The design of drainage system and assessment standard must be determined according to the corresponding stage of groundwater to be controlled. The fuzzy grade classification method is applied to approximately deal with the depth of impermeable layer. The simplified general equation of unsteady flow for calculating the spacing of drainage ditches(or pipes) is deduced. The result of case study shows that the controlling indices of dynamic process of proposed water table regime are in accordance with observation data. It demonstrates that the equation for calculation of spacing is reasonable. |
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