| 潜流人工湿地基质结构与水力特性相关性研究 |
| 摘要点击 2669 全文点击 1285 投稿时间：2013-05-19 修订日期：2013-07-04 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 潜流人工湿地 Visual Modflow 数值模拟 基质结构 示踪 |
| 英文关键词 subsurface flow constructed wetlands Visual Modflow numerical simulation substrate structure tracer |
| 作者 | 单位 | E-mail | | 白少元 | 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 | baisy@glut.edu.cn | | 宋志鑫 | 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 | | | 丁彦礼* | 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 | dyl@glut.edu.cn | | 游少鸿 | 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 | | | 何珊 | 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 | |
|
| 中文摘要 |
| 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. |
| 英文摘要 |
| 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. |
|
|
|
