How sustainable, green and smart eco-cities deal with water issues

Cities are increasingly facing water problems because of urbanisation, economic development and climate change. This chapter compares sustainable, green and smart eco-cities approaches as well as different interventions. The approaches use similar interventions. Technical solutions range from water infiltration and rainwater harvesting systems to introducing the separation of grey and brown water. The chapter describes the relative importance of the concepts and the interventions at different levels of government and at the household level, using modern technological options and urban governance structures. The chapter argues in favor of integrated approaches to urban water issues. Successful interventions require appropriate technological solutions, governance structures and financial system to assure the operation and maintenance cost can be paid, preferably through a cost recovery mechanism.