- if rainwater is not drained out in time. A great deal of effort in water resource management is directed at optimising the use of water and in minimising the environmental impact of water use on the city environment. The term 'Sponge City' refers to the idea of a city where its urban underground water system operates like a sponge to absorb, store, leak and purify rainwater, and release it for reuse when necessary. The book comprises 41 projects of urban landscape architecture, showing the exploration of the role of water management in urban spatial planning.
