In Southeast Asian countries, ferrocement tanks find widespread use in capturing rooftop rainwater. In Israel, microcatchments have proved to be more efficient in harvesting rain. In Kenya, rainwater harvesting has contributed significantly to alleviating poverty and improved agricultural production. The success of these efforts reveals the diversity of traditions, technologies, needs and potential of these systems. It also indicates that communities want to take water management into their hands.
Urban wastewaters pollute rivers and aquifers.
Even as high demand deplete aquifers and rivers, downpours leave the city waterlogged. As natural drainage channels get clogged up and the urban catchments degrade, urban tanks and lakes dry up. With heavy concretisation of urban areas, urban floods become common. Thus, the urban citizen has to deal with water scarcity on one hand and flooded streets on the other. Urban water management is in a total mess in India.