土地利用变化对城市积涝的影响研究——以南京市浦口区为例

我国城市化发展加快,更容易产生城市内涝灾害,城市内涝已经成为必须面对和解决的"城市病"。本研究选取快速城镇化过程中的南京市郊区——浦口区,利用遥感技术解译1981—2010年中7个时期的土地利用变化的情况,并且选取2014年9月28日降水过程,使用SCS产流模型与平面二维非恒定流胜维南方程模拟不同时期土地利用情景下浦口区的积水情况,定量分析土地利用变化对城市内涝的影响。结果表明,随着城市化的发展,耕地的减少,居住用地和交通用地等硬化地迅速增加,积水面积呈增大的趋势,即:城市化加大了城市积涝的风险。

Impact of land use change on urban waterlogging: Case of Nanjing Pukou

With the acceleration of urbanization in China, the urban waterlogging required a great deal of effort to solve. Pukou district, suburb of Nanjing, was selected to interpret the land use variation in seven periods during 1981-2010 by using the remote sensing technology. Moreover, the precipitation process on Sep. 28, 2014 was selected to simulate the waterlogging situation in Pukou district by using the SCS runoff model and the saint venant equations of two-dimensional unsteady flow, and quantitative analysis on the impact of land use change on urban waterlogging was also conducted. Results show that with the development of urbanization, the reduction of farmland, and the increase in residential land and traffic land lead to the increase in waterlogging, therefore, the risk of waterlogging in cities goes up quickly.