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长江上游山地城市江岸景观修复设计研究——以重庆主城为例
袁嘉, 罗嘉琪, 侯春丽, 杨柳青
重庆大学
摘要:
在长江上游众多沿江山地城市中,复杂地形与水文过程、物质与结构失稳以及生境退化等复杂环境挑战,导致江岸景观的生态缓冲、生物多样性保育及观赏游憩等重要功能严重衰退。选取长江重庆主城段江岸为研究区域,针对其典型生态特征与环境挑战,提出江岸景观修复设计的3项策略:1)应对多重水位变化的分圈层韧性植物筛选;2)护坡立体生态种植;3)河漫滩“植被—底质—微地貌”耦合设计。在重庆主城典型江岸九龙外滩实施修复实践,定量评估修复后江岸的植物群落结构及多样性变化,结果表明:修复后的江岸景观呈现出优美的立体生态外貌,群落多样性逐渐提升,景观韧性与生态服务功能持续优化。可为长江上游流域生态修复及山地城市韧性江岸景观建设提供科学依据和可参考的应用范式。
关键词:  风景园林  长江上游流域  山地城市  城市河流  江岸景观  生态修复  韧性景观  植物设计
DOI:10.14085/j.fjyl.2021.07.0076.07
分类号:TU986.2
基金项目:国家自然科学基金青年科学基金项目(编号 51808065);中央高校基本科研业务费 ( 编号 2020CDJQY-A010);中国科学院山地生态恢复与生物资源利用重点实验室及生态恢复与生物多样性保育四川省重点实验室开放课题(编号 KXYSWS2001)
Research on Restoration Design of Riparian Landscape in Mountainous Cities in Upper Reaches of the Yangtze River: A Case Study of Chongqing Downtown
YUAN Jia, LUO Jiaqi, HOU Chunli, YANG Liuqing
Chongqing University
Abstract:
Among the mountainous cities along the upper reaches of the Yangtze River, complex environmental challenges including complicated terrains and hydrological processes, material and structural instability, and habitat degradation have led to a serious decline in major functions of the riparian landscape in terms of ecological buffering, biodiversity conservation, and amenities for recreation. This research chooses the riparian landscape of the Yangtze River in downtown Chongqing as the subject. In view of its ecological characteristics and environmental challenges, it proposes three restoration strategies: 1) Selection of resilient plant species for circling-layer structure adapting to complex water level changes; 2) Multi-layered ecological planting for the slope revetment; 3) “Vegetation-sediment-microtopography” integrated design for floodplain ecosystem. It carries out practical restoration of Jiulongwaitan riparian landscape in Chongqing downtown, while conducting quantitative investigations on the structure and diversity changes of the riparian vegetation. The results reveal that the restored riparian landscape presents a visually attractive ecological appearance, the plant community diversity is gradually increased, and the landscape resilience and its ecosystem services are continuously optimized over time. This research can provide a scientific guidance and application paradigm for ecological restoration in the upper reaches of the Yangtze River and resilient riparian landscape construction in mountainous cities.
Key words:  landscape architecture  upper reaches of the Yangtze River watershed  mountainous city  urban river  riparian landscape  ecological restoration  resilient landscape  planting design
引用本文:袁嘉,罗嘉琪,侯春丽,杨柳青.长江上游山地城市江岸景观修复设计研究——以重庆主城为例[J].风景园林,2021,28(7):76-82.
YUAN Jia,LUO Jiaqi,HOU Chunli,YANG Liuqing.Research on Restoration Design of Riparian Landscape in Mountainous Cities in Upper Reaches of the Yangtze River: A Case Study of Chongqing Downtown[J].Landscape Architecture Journal, 2021, 28(7):76-82.