城市河道“近自然化”修复案例研究与启示

The Case Study of "Close-to-Nature" Restoration of Urban Rivers & Enlightenment

城市河道渠化对河流生态系统造成胁迫,导致城市河流环境进一步恶化.由于当前众多的城市河道治理实践并没有实现其生态系统良性循环,故而虽然投入大、成本高、技术手段日趋复杂,但治理效果并不理想.本文结合国外河流生态修复与改造案例,从设计到施工两个层面解读“近自然化”的河道修复理念,以期不断更新河流治理的策略和技术.为我国河流生态修复实践提供新思路.

The channelization of urban rivers may cause stress on the river ecosystem and further deteriorate the surrounding environment.Because of the failure in realizing a virtuous cycle of ecosystem in the decontamination process,generally the treatment of urba n rivers does not achieve the desired results despite of huge in vestment,high cost incurred therefore and application of advaneed technology.Hence,it is necessary to broaden the scope of our ideas and methods,and renew our tactics and technology in treatment of urban rivers.Based on the cases of ecological restoration of urban rivers in other countries,the paper interprets the"close-to-nature"concept of river treatment from the perspective of desig n and con struction,in order to provide a new in sight for the practice in China.