河段尺度下的城市渠化河道近自然化策略研究

河流近自然化治理的理念正在逐步拓展和实现，对于仍在高速发展的中国来说，预示着传统的技术手段到了需要革新的时代。河流系统是多重等级系统，本文选取河段尺度的城市渠化河流作为研究对象，确定渠化河流的形态特征、功能特征和空间特征，并以此将渠化河流分为3类，即空间紧缩的、有弹性余地的和有较大空间拓展的河道。论文基于大量的基础研究和工程考察，对应3类河道，创新的提出城市紧缩型河道策略、城市弹性型河道策略和城市开拓型河道策略。该策略体系的总结是应对未来中国城市渠化河流改造趋势的一个重要的探索与努力。

Strategies of Close-to-nature Harnessing of Urban Canalized River at the Reach Level

The concept of close-to-nature harnessing of rivers is progressively expanded and implemented. For China, which is still developing at a high speed, it indicates that traditional technological means have reached an era of innovation. The river system is a multi-level system. This paper focuses on urban canalized rivers of river reach scale, and classifies them into three types on the basis of their morphological, functional and spatial characters, which are the rivers with constrictive space, resilient space and large space to expand. Based on a large number of basic researches and engineering investigations, this paper, corresponding to the three types of rivers, innovatively puts forward strategies for urban constrictive rivers, resilient rivers and expanding rivers. To sum up, the strategy system is an important exploration and efforts to deal with the future trend of urban canalized river reconstruction in China.