Ecological wetland paradigm drives water source improvement in the stream network of Yangtze River Delta  

作　　者：Weidong Wang Ting Yang Weibing Guan Weixi Peng Ping Wu Bin Zhong Chundong Zhou Qinghua Chen Rongbin Zhang Kewen Xu Chengqing Yin 

机构地区：[1]Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]College of Marine Ecology and Environment,Shanghai Ocean University,Shanghai 201306,China [4]Jiaxing Water Conservancy Investment Co.Ltd.,Jiaxing 314033,China [5]Water Resources&Hydroelectric Prospecting&Design Research Institute of Jiaxing City,Jiaxing 314033,China [6]Haining Clean Source Water Co.Ltd.,Haining 314400,China [7]Jiaxing Qiuyuan Monitoring Technology Co.Ltd.,Jiaxing 314006,China

出　　处：《Journal of Environmental Sciences》2021年第12期55-72,共18页环境科学学报（英文版）

基　　金：supported by the National Science and Technology Major Project for Water Pollution Control and Treatment(Nos.2017ZX07201004–002,2012ZX07403–003–03,2008ZX07421–001–04);National Natural Science Foundation of China(No.51278487);。

摘　　要：Jiaxing created a precedent using bypass riparian marshes to purify micro-polluted water sources in China.Pond-wetland complex with constructed root channel technology becomes a paradigm which can be analogized as"human-body wetland model"based on bionics or biomimetics.Heterogeneous plant-bed/ditch system with highly active land/water ecotone interfaces,especially meandering boundaries,breeds many biochemical reactions"living areas".Optimization of hydraulic regulation promotes redox environment alternations and wetland treatment efficiency.Here we reported a series of upgrades and performances in Guanjinggang wetland after the Shijiuyang prototype.Morphological reform of plant-bed/ditch system played a vital role.Spatially root channel zone was main force of wetland purification,and temporally the treatment effect was higher in low-temperature seasons indicating non-temperature dependent mechanisms worked.Water pollution comprehensive index improved steadily from IV to III,and comprehensive pollution load was reduced by ca.40%–60%.Comprehensive evaluation function value further showed the gradients purification effect of the upgraded wetland.Ecological wetlands ameliorated source water quality,and reduced drinking water treatment reagents,thereby bringing about economic benefits.Through wetlands operation,people can see how the micro-polluted surface water becomes clear and clean,so promoting a significant social benefit.As a viable component of urban green space,wetlands could beautify regional eco-environment,freshen the air,increase urban ecological taste,and enhance the eco-environmental protection publicity.Thus,the multifunctional service values and indirect benefits are substantial.Jiaxing ecological wetlands provide a typical paradigm for water pollution remediation in developing countries and plays a leading role in technology engineering radiation effect.

关 键 词：Pond-wetland combination Constructed root channel technology Plant-bed/ditch system Semi-subsurface flow wetland Human-body wetland model 

分 类 号：X52[环境科学与工程—环境工程]