The primary objective of this consultancy study is to capture the existing characteristics of the blue green elements in Chennai Metropolitan Area (CMA), analyze and identify the problems related to the blue green elements including climate change threats, identify the gaps and weaknesses, and develop suitable contextual BGI and recommendations on implementation strategy for climate-resilient urban and regional development in CMA. The study is also expected to highlight the constraints in implementation of the BGI as well as specify implementation strategy on short term and long-term basis, indicating enabling conditions including institutional requirements in CMA. 

The study included the assessment of climate change impacts and risks in Chennai and make recommendations on suitable BGI-oriented infrastructure design and policies for adaptation and mitigation. The design shall include a combination of structural and non-structural (ecological engineering) techniques to soften the edges of the waterways, lakes, tanks, and ponds to give them a natural appearance (green corridors) and to alter the constructed urban barriers (streets, sidewalks, buildings, or train tracks) to improve the green cover and increase the resilience of the city from climate change impacts.