城市河道生态景观对防洪的影响

Influence of urban river ecological landscape on flood control

河道是城市生存发展的重要资源,彻底改善水质、增强河道防洪能力、促进水系的循环、解决河道现状问题是城市建设中较为重要的部分。本文以大凌河为例,设计了四种景观方案,利用物理实验和数值模拟等研究手段,通过流体动力学、计算机数值分析等技术,将植被群及景观岛高度作为水流的主要影响要素进行研究,并对洪水来袭时不同的生态景观方案下河道的水位和流速进行模拟,进而定性分析不同城市生态景观对防洪的影响。该研究对景观防洪的实际应用有着非常重要的现实意义。

River channel is an important resource in urban survival and development. It is more important for urban construction to improve water quality completely, enhance the capacity of river flood control, promote water system circulation and solve the problem of river channel status. Daling River is adopted as an example for designing four landscape plans. Physical experiment, numerical simulation and other research means are utilized for studying vegetation groups and landscape island height as main influencing factors of water currents through fluid dynamics, computer numerical analysis techniques and other techniques. River channel water level and flow velocity under different landscape plans during floods are stimulated, thereby qualitatively analyzing the influence of different urban landscapes on flood control, and the study has very importance practical significance for practical application of landscape flood control.