While urbanization and increasing population has put much pressure on natural drainage channels and resulted in increase in looding, there is increased pressure on available water resources due to climate change, reduction in frequency of rainfall events and drought. The emergence of a sustainable drainage system (SuDS), also known as best management practice (BMP) and low impact development (LID), has changed the management strategy of drainage from conventional to sustainable. SuDS techniques seek to deliver the three cardinal paradigms of sustainable drainage: quantity, quality and amenity and as such, they can ofer an additional beneit for applications such as landscape irrigation. Most SuDS techniques have the potential for water storage with minimal or no modiications required. This chapter, while covering the capabilities of SuDS systems, explores SuDS devices such as pervious pavements equipped with excess storage capacity, cisterns and tanks harvesting roofwater, iniltration systems aimed at supporting the growth of urban plants and green roofs with the potential to store water in order to maintain water demanding planting scheme even during dry periods. It also covers systems where SuDS is the main driver to device installation and address issues and considerations surrounding applications of such systems in water harvesting for irrigation.

The use of pervious pavements is an important technique used for source control in sustainable drainage systems (SUDS) that allows water to infiltrate into hard surfaces and then slowly releases it to either a drainage outlet or into the ground. SUDS also remove low levels of pollution from the water by filtration and biodegradation of hydrocarbons that are adsorbed to materials within the construction. Current pervious pavement systems are not used in locations where the risk of pollution occurring is high or if they would allow the infiltration of water into the ground where groundwater protection is a concern. This paper describes trials of an oil interceptor that can be incorporated within pervious surface construction. The testing was undertaken to assess how the system retains pollution within it under simulated worst credible pollution and rainfall events. The results demonstrated that it can effectively contain hydrocarbon and metal pollution thus providing improved water quality. The water that flows out of the system has 50 times less oil pollution than the requirements specified for a Class 1 oil interceptor, when lubricating oil is applied to the surface. The water quality is over ten times better than the specified requirement when diesel is applied. Where detergents may be present they can cause minor contamination of the outflow waters and secondary treatment may be required.

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