继承与反思--浙江大学紫金港校区西区规划

本文介绍了浙江大学紫金港校区西区的规划设计实践过程。西区规划一方面继承了东区“大学园林”的基本构想,塑造了富含地域特色的湿地校园,另一方面针对东区在实际使用中的不足之处,在新的校区规划中提出了相应的调整策略。     

城市湿地公园控制性详细规划控制要素与指标体系构建--以西安浐灞国家湿地公园为例

湿地公园在设计中很难把握“严格控制”和“设计优先”的相互关系,在指导实际建设中存在大量问题。本文结合西安浐灞国家湿地公园实际案例,对城市湿地公园控制性详细规划中的用地划分、控制对象等内容进行了初步探讨。     

基于农业用地开发的湿地公园景观建设——以白海面湿地公园工程为例

随着我国城市化进程的不断加快,大量的农用土地迅速的被城市吞噬,农业风貌也在慢慢的消失。面对这种情况,将原农业用地转化为城市湿地公园用地是一个比较好的方法。本文对广州市白云区的白海面湿地公园做了详细地探讨。     

复合型人工湿地系统设计参数研究

针对目前在矿区污水处理应用的人工湿地系统存在的问题,利用人工土壤快渗作为人工湿地系统的预处理措施构建复合型处理系统,依托实例分别确定了两个子系统的设计指导原则及核心控制指标,分析各项设计参数及其影响因素,对后续工程设计及项目实施奠定基础,并为改进矿区人工湿地系统提供了借鉴作用。     

北方某镇水环境问题及其治理措施

通过对北方某镇的环境现状进行分析,确定了生活污水是造成环境问题的主要因素,结合该镇的特点,介绍了进出水水质、水量、污水处理工艺,对处理后出水零排放可行性进行了分析,并估算了工程投资及运行成本,对提高该镇的环境质量具有重要意义。     

高原湿地公路软基处理及监测分析

通过对集丰高速所经过的黄旗海湿地地质勘察及地基软土工程性质的分析,在对湿地保护、高速公路投资等因素考虑的基础上,按照软基处理的基本原则和要求,综合考虑实际情况,给出了采用碎石桩复合地基处理高原湿地软基的方案,经监测地基沉降量小,满足规范要求,保证了工程质量,保护了高原湿地的地态环境。     

Remediation of groundwater contaminated with MTBE and benzene: the potential of vertical-flow soil filter systems

Field investigations on the treatment of MTBE and benzene from contaminated groundwater in pilot or full-scale constructed wetlands are lacking hugely. The aim of this study was to develop a biological treatment technology that can be operated in an economic, reliable and robust mode over a long period of time. Two pilot-scale vertical-flow soil filter eco-technologies, a roughing filter (RF) and a polishing filter (PF) with plants (willows), were operated independently in a single-stage configuration and coupled together in a multi-stage (RF + PF) configuration to investigate the MTBE and benzene removal performances. Both filters were loaded with groundwater from a refinery site contaminated with MTBE and benzene as the main contaminants, with a mean concentration of 2970 ± 816 and 13,966 ± 1998 μg L⁻¹, respectively. Four different hydraulic loading rates (HLRs) with a stepwise increment of 60, 120, 240 and 480 L m⁻² d⁻¹ were applied over a period of 388 days in the single-stage operation. At the highest HLR of 480 L m⁻² d⁻¹, the mean concentrations of MTBE and benzene were found to be 550 ± 133 and 65 ± 123 μg L⁻¹ in the effluent of the RF. In the effluent of the PF system, respective mean MTBE and benzene concentrations of 49 ± 77 and 0.5 ± 0.2 μg L⁻¹ were obtained, which were well below the relevant MTBE and benzene limit values of 200 and 1 μg L⁻¹ for drinking water quality. But a dynamic fluctuation in the effluent MTBE concentration showed a lack of stability in regards to the increase in the measured values by nearly 10%, which were higher than the limit value. Therefore, both (RF + PF) filters were combined in a multi-stage configuration and the combined system proved to be more stable and effective with a highly efficient reduction of the MTBE and benzene concentrations in the effluent. Nearly 70% of MTBE and 98% of benzene were eliminated from the influent groundwater by the first vertical filter (RF) and the remaining amount was almost completely diminished (∼100% reduction) after passing through the second filter (PF), with a mean MTBE and benzene concentration of 5 ± 10 and 0.6 ± 0.2 μg L⁻¹ in the final effluent. The emission rate of volatile organic compounds mass into the air from the systems was less than 1% of the inflow mass loading rate. The results obtained in this study not only demonstrate the feasibility of vertical-flow soil filter systems for treating groundwater contaminated with MTBE and benzene, but can also be considered a major step forward towards their application under full-scale conditions for commercial purposes in the oil and gas industries.     

边坡人工湿地/水生植物塘集成技术处理水产养殖排水

针对上海松江五厍农业园区水产养殖污染问题,提出以边坡人工湿地/水生植物塘集成技术进行处理。集成技术示范工程的实际运行结果表明:该技术对水产养殖污染物的削减行之有效,每年COD、TN、TP的减排强度分别达到896、35.21、0.9 kg/hm2,初步解决了园区水产养殖排水污染问题。同时,水生植物塘中生长的浮萍可以用作水产养殖饲料,符合现代水产养殖的发展趋势。     

波士顿大都市公园系统与珠三角区域绿道的比较研究——以深圳为例

在快速城市化进程中出现的用地无序扩张、环境恶化等问题的背景下,绿道规划有效遏制了城市蔓延,保护和改善了城市公共空间,从而达到可持续发展的目的.以美国波士顿大都市公园系统和深圳绿道为研究案例,通过介绍其规划思想和建设实施效果,对我国珠三角地区绿道的建设经验进行对比和总结,分析两者的相似性及差异性,详细阐述了美国绿道规划对构建我国区域规划可持续发展具有的重要意义.     

上海世博园区黄浦江段防洪墙改造与滨岸带生态修复技术解读

上海世博园区建于黄浦江畔,历史上曾是港汉丛生,但由于过去的城市建设缺乏科学的规划,许多入江支流被填埋,目前仅保留了河流的主干,河流生态系统退化,原有的丰富多样的湿地类型逐渐消失.恢复和重建黄浦江畔原有的自然湿地,不仅是建设生态世博的需要,也给人类在城市中领略和体会大自然带来了财富和乐趣的机会.黄浦江段生态修复技术包括:防洪墙的改造、近自然边滩的保护与建设、河流生态的原位修复以及湿地水质净化系统的构建等.