| 潜流人工湿地基质结构与水力特性相关性研究 |
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| 引用本文： | 白少元,宋志鑫,丁彦礼,游少鸿,何珊.潜流人工湿地基质结构与水力特性相关性研究[J].环境科学,2014,35(2):592-596. |
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| 作者姓名： | 白少元 宋志鑫 丁彦礼 游少鸿 何珊 |
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| 作者单位： | 桂林理工大学广西矿冶与环境科学实验中心, 桂林 541004;桂林理工大学环境科学与工程学院, 桂林 541004;桂林理工大学广西矿冶与环境科学实验中心, 桂林 541004;桂林理工大学环境科学与工程学院, 桂林 541004;桂林理工大学广西矿冶与环境科学实验中心, 桂林 541004;桂林理工大学地球科学学院, 桂林 541004;桂林理工大学广西矿冶与环境科学实验中心, 桂林 541004;桂林理工大学环境科学与工程学院, 桂林 541004;桂林理工大学广西矿冶与环境科学实验中心, 桂林 541004;桂林理工大学环境科学与工程学院, 桂林 541004 |
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| 基金项目： | 广西矿冶与环境科学实验中心项目（KH2012ZD004）；广西科技厅（桂科攻1140002-1-2）；广西自然科学基金项目（2013GXNSFBA019210） |
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| 摘 要： | 利用数值模拟方法结合实验手段,研究基质结构与系统水力特性的相关性,数值模拟结果表明,填料渗透系数对人工湿地水力效率影响很大,单层结构人工湿地系统中,填料渗透系数越大,流场分布越不均匀;由上到下填料渗透系数逐渐增加的分层填充方式能有效避免短流及死区的发生,提高系统水力效率.根据数值模拟结果构建两个人工湿地对比小试实验系统,并开展示踪实验对模拟结果进行验证,示踪实验结果表明,分层填充结构水力特性显著优于单层结构潜流人工湿地,二者有效体积比分别为0.87和0.49.可见,数值模拟方法能够有效应用于潜流人工湿地基质结构参数优化方面.
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| 关 键 词： | 潜流人工湿地 Visual Modflow 数值模拟 基质结构 示踪 |
| 收稿时间： | 2013/5/19 0:00:00 |
| 修稿时间： | 7/4/2013 12:00:00 AM |
Correlation of Substrate Structure and Hydraulic Characteristics in Subsurface Flow Constructed Wetlands |
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| BAI Shao-yuan,SONG Zhi-xin,DING Yan-li,YOU Shao-hong and HE Shan.Correlation of Substrate Structure and Hydraulic Characteristics in Subsurface Flow Constructed Wetlands[J].Chinese Journal of Environmental Science,2014,35(2):592-596. |
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| Authors: | BAI Shao-yuan SONG Zhi-xin DING Yan-li YOU Shao-hong and HE Shan |
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| Institution: | Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment, Guilin University of Technology, Guilin 541004, China;College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China;Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment, Guilin University of Technology, Guilin 541004, China;College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China;Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment, Guilin University of Technology, Guilin 541004, China;College of Earth Sciences, Guilin University of Technology, Guilin 541004, China;Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment, Guilin University of Technology, Guilin 541004, China;College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China;Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment, Guilin University of Technology, Guilin 541004, China;College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, China |
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| Abstract: | The correlation of substrate structure and hydraulic characteristics was studied by numerical simulation combined with experimental method. The numerical simulation results showed that the permeability coefficient of matrix had a great influence on hydraulic efficiency in subsurface flow constructed wetlands. The filler with a high permeability coefficient had a worse flow field distribution in the constructed wetland with single layer structure. The layered substrate structure with the filler permeability coefficient increased from surface to bottom could avoid the short-circuited flow and dead-zones, and thus, increased the hydraulic efficiency. Two parallel pilot-scale constructed wetlands were built according to the numerical simulation results, and tracer experiments were conducted to validate the simulation results. The tracer experiment result showed that hydraulic characteristics in the layered constructed wetland were obviously better than that in the single layer system, and the substrate effective utilization rates were 0.87 and 0.49, respectively. It was appeared that numerical simulation would be favorable for substrate structure optimization in subsurface flow constructed wetlands. |
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| Keywords: | subsurface flow constructed wetlands Visual Modflow numerical simulation substrate structure tracer |
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