The fact finding committee report on Mumbai floods of July 2005 has argued that ‘ training’ of rivers is necessary for rivers in reclaimed areas. Unfortunately, the civic administration seems to have generalised that all the rivers have been modulated on account of reclamation – planned or otherwise. The Mouth of Oshiwara, Poisar, Mithi rivers and Vakola, Irla, Moragaon and many other nullahs draining into Mahul, Thane, Mahim, Versova, Manori and Gorai Creeks have changed course per the patterns of city growth.
However, the same cannot be said about the upper reaches of the rivers and almost the whole of the Dahisar, which has maintained its course and has had definitive flood patterns at least in the past 400 years. Within the same report, the committee has urged that detailed investigations should be carried out; these should include contour profiling for the entire catchment and demarca-