Date of Publication :9th March 2017

Abstract: This paper emphasis on the precipitation initiated flooding which is produced by excessive depth rainfall within the city area that is overwhelmed due to improper management of drainage system. Globally water logging is a concern in all developed countries and is playing a vital role in the infrastructure management. It has become part and parcel of mostly all around the world and the good team of researchers and engineers are working to solve this issue but the recurrence of this issue is increasing. This paper speaks about the blue roof network system which has the potential to reduce the peak runoff of storm water and this study examines its potential for controlling drainage overflows through a GIS analysis in H-East ward of Mumbai, India which has been encountering water logging problem from last few decades. The Mumbai's drainage system works on the gravity based system and the end outfall is placed below as well as above the mean sea level based on various criteria such as tidal levels etc. During heavy rains, the high tides create a problem in the drainage system in such a way that the rainwater remains in the sewer and can't be drained out in the streams and this create water logging issues in the nearby vicinity. Flood management measures and study is needed at this point of time and because always space is a constraint in a city like Mumbai, the proposed measures have to be progressive to obtain the desired protection degree with minimal disturbance to the existing conditions. This study finds a solution to this problem by capturing of as much precipitation as possible every time it rains. Through a comprehensive design of control flow device over the conventional drain on the roof terrace of buildings also the study demonstrate herein with a concept of blue roofs network system on every building in the study area would decrease the number of sewer overflow events

Reference :