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不同布水方式下水平潜流人工湿地水动力学机制研究

期刊名称：EI源刊论文
时间：0
分类：X143[环境科学与工程—环境科学]
作者机构：[1]东华大学环境科学与工程学院,上海201620, [2]中国水利水电科学研究院水资源研究所,北京100044
相关基金：国家自然科学基金创新群体研究基金（50721006）;国家水专项（2008ZX07207-006-004）;国家重点基础研究发展计划973计划专题（2006CB403402-3）;上海市重点学科项目（B604）;上海市自然科学基金（10ZR1400300）
相关项目：流域水循环模拟与调控

关键词：水平潜流人工湿地, 示踪剂试验, 水力停留时间分布, 对流扩散模型, 连续反应器模型, horizontal subsurface flow constructed wetlands, tracer tests, hydraulic residence time distribution, dispersion and plug flow model, completely stirred tank reactor model

中文摘要：

通过6种布水方式（一般推流、多向入流、部分回流、波流、对角流、多点进水），进行了水平潜流人工湿地的脉冲示踪剂试验研究，获得其水力停留时间概率分布密度曲线。分别用4种不同概率分布函数（正态分布、对数正态分布、卡方分布、瑞利分布）对其水力停留时间的概率分布密度进行拟合分析，结果表明：对数正态分布的拟合效果最好。将对流扩散模型和连续反应器模型用于示踪剂的迁移过程模拟，结果表明：连续反应器模型比较适合模拟部分回流式布水方式，对流扩散模型则能够较好模拟其他5种布水方式。考虑多向入流和多点进水的示踪剂浓度叠加作用，进一步利用基于对流扩散机制的叠加模型进行示踪剂迁移过程模拟，结果表明：基于对流扩散机制的叠加模型能够较好模拟多向入流、多点进水类型的水平潜流人工湿地。

英文摘要：

The tracer tests for horizontal subsurface flow constructed wetlands with six inflow configurations including common push flow, more direction inflow, part circumfluence, wave flow, diagonal flow, and more point inflow, were carried out. The hydraulic residence time distribution density curve of the test results were obtained. Four kinds of probability distribution functions （normal distribution, logarithm normal distribution, chi-square distribution, and Rayleigh distribution） were used to analyse the data. It was found that, the logarithm normal distribution function has better results in fitting plot. According to the simulation results on tracer concentration of six kinds of horizontal subsurface flow constructed wetlands with different inflow configuration, the completely stirred tank reactor model （CSTRM） is better to fit part circumfluence inflow configuration, the dispersion and plug flow model （DPFM） is better to fit other five kinds of inflow configuration. Considering tracer concentration folding of more direction inflow and more point inflow constructed wetlands, this study discovers that the dual DPFM is better to simulate their tracer movement in horizontal subsurface flow constructed wetlands.