ABSTRACT

In this paper, based on remote sensing image processing and SWMM simulation, we evaluate the effectiveness of a coupled LIDs system for the watershed scale. The main content and contributions include: 1) the extraction and classification of historical and recent LULC data (in 1979, 1989, 1999, 2009, 2017) of the study area and an analysis of the characteristics of the LULC change; 2) a watershed-based SWMM applied to the simulation of the runoff and an analysis of the runoff change characteristics; 3) the proposal and design of three coupled LIDs scenarios which treat runoff change as evaluation metric to systematically discuss the effectiveness of LIDs in the watershed. The results show that the combination structure and scale can significantly affect the coupled LIDs effectiveness. A system with multiple LIDs is more effective than one with only single LIDs. With the increase of spatial scale, the effectiveness of the coupled LIDs gradually weakens. Our research enriches the application scale of LIDs and SWMM, and can be beneficial to the construction of the “Sponge City”, storm management and urban planning.

摘要

在本文中，基于遥感图像处理和 SWMM 模拟，我们评估了流域尺度耦合 LID 系统的有效性。主要内容和贡献包括：1）研究区历史和近期LULC数据（1979年、1989年、1999年、2009年、2017年）的提取和分类，以及LULC变化特征分析；2) 基于流域的 SWMMH 应用于径流模拟和径流变化特征分析；3) 三个耦合 LIDs 方案的提议和设计，将径流变化视为评估指标，以系统地讨论流域 LIDs 的有效性。结果表明，组合结构和规模可以显着影响耦合 LIDs 的有效性。具有多个 LID 的系统比只有单个 LID 的系统更有效。随着空间尺度的增加，耦合LIDs的有效性逐渐减弱。我们的研究丰富了 LIDs 和 SWMM 的应用规模，有利于“海绵城市”的建设、风暴管理和城市规划。