Integrated Decision Support System for Sponge City Management: A Case Study of the National Demonstration Area of Guangming District, Shenzhen

China is currently entering a post-sponge-city era. Determining how to effectively present and manage the construction and operation of green infrastructures is one of the critical issues arising. Decision support systems (DSSs), which combine advanced information technologies such as the Internet of Things (GIS) with environmental models, provide intelligent solutions for integrated management. This chapter presents a state-of-the-art DSS platform of Guangming District, Shenzhen, one of the best national sponge city demonstration regions. In this platform, seven subsystems are integrated according to the requirements of stakeholders, including the big data centre, data mining and comprehensive simulation systems, a 3D sponge city display system, a project lifecycle management system, a performance appraisal system, a monitoring system of black and odorous water, and a flood control and drainage management system. The focus of this chapter is the system architecture, monitoring campaign, data processing, model intergradation, and workflows of supervision. The system has been online for one year. The advantages and drawbacks of the DSS are also summarised herein, and the future trends of integrated management in the post-sponge-city era are discussed. This chapter can provide a good engineering reference for smart sponge city management in other cities.