Abstract
Recent torrential rains and floods in Mumbai have raised numerous questions. The Government of Maharashtra and the Mumbai Municipal Corporation have taken up certain public works to address flood control and drainage. There is, however, an urgent need to protect the mangroves, creeks and green areas, and restore the original drainage basins, water channels and culverts in the reclaimed areas. This paper proposes the adoption of the concept of bio‐drainage. This is based on the twin principles of segregation of rainwater from urban waste water disposal and the principle of zero run‐off drainage by creating retention ponds, lakes and storage. A network of canals can act as drainage system and also can retain rainwater for recycling during lean days. This system should incorporate regular oxidation and root‐zone cleaning and filtration of storm water. Together with restoration of mangrove plantations, a network of high‐tech holding tanks should be built.
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