Review Based on Investigation of Urban Rainwater Harvesting Projects in Beijing

摘要

Since the 1990s, the development speed of urban rainwater harvesting (RWH) in China has been accelerating. Beijing, for example, went through three stages of development that included technology research, demonstration and promotion. By the rainy season of 2009, more than 700 RWH projects had been built. Through field investigation and monitoring, dozens of typical RWH projects with different uses and treatment processes were analyzed, such as rainwater reusing purposes, water quality, the rationality of scale and investment, etc. The choice of factors influencing RWH modes selection was made based on different situations. The optimal scales of RWH projects were put forward separately in accordance with rainfall, water demand and investment. The results can provide references for the design of RWH projects in Beijing and other cities of China, as well as for the formulation of policy for urban rainwater management.