海口市水系演变特征及其对区域环境的影响

Characteristics of River System Evolution and Its Influence on Regional Environment in Haikou City

通过计算海口市城区不同时期的河网密度、水面率、支流发育系数等指标,分析了水系演变特征,发现在过去50年,由于城市化等因素的影响,海口市水系结构数量特征、结构特征、网络复杂性都存在不同程度的衰减。海口市水系演变会导致城市河网调蓄能力降低、城市减弱热岛效应能力差、城市水环境恶化、居民滨水公共开敞空间急剧萎缩等环境问题。本研究对开展新形势下城市水系规划及防洪排涝等具有重要的参考意义。

In this study, the characteristics of river system evolution are analyzed by calculating the river network density, water surface rate and tributary development coefficient in different periods of Haikou City. It is found that in the past 50 years, due to urbanization and other factors, there are different degrees of attenuation about water features, structural characteristics, and network complexity in Haikou City. The evolution of the river system in Haikou City will lead to the decrease in urban river network storage capacity, the poor ability of city to weaken the heat island, the deterioration of urban water environment, the rapid decline of residents ~ waterfront public open space and other environmental problems. This study is very significant to carrying out the urban river system planning and flood control and drainage under the new sltuat^on