城镇化进程中低丘山区水系连通性的初步研究与实践

Preliminary Research on the Connectivity of Water System in Low Hilly Areas in the Process of Urbanization

针对低丘山区水系在城镇化进程中存在的一系列问题,以南昌市望城新区为例,从结构连通性、水力连通性和地貌特性3个方面出发,选取9项评价指标,充分考虑水体流动能力和输水效率的影响,改进了水流动势的公式,构建了一套全面的水系连通性评价体系,并对规划前、后的河网水系格局与连通性进行了对比分析。研究得出,规划后水系各项指标均呈不同幅度的增长,水系连通性增强。望城新区的应用实例表明,构建的评价指标体系可反映低丘山区水系的连通状况。

Aiming at a series of problems existing in the water system in the process of urbanization in low hilly areas,this paper takes Wangcheng New District of Nanchang as an example,nine evaluation indexes are selected from three aspects of structural connectivity,hydraulic connectivity and geo-morphological characteristics,fully considering the influence of water flow capacity and water conveyance efficiency,the formula of water flow potential is improved,and a comprehensive water system connectivity evaluation system is constructed.The pattern and connectivity of water network before and after the planning are compared and analyzed.The result shows that after the planning,the indexes of the water system increase in different ranges,and the connectivity of the water system is enhanced.The application example of Wangcheng New District shows that the evaluation index system constructed can reflect the connection status of water system in low hilly areas.