BMC to go for geopolymer lining on walls of British-era arch drains ahead of monsoon
360° Perspective Analysis
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Context
The Brihanmumbai Municipal Corporation (BMC) is implementing a novel 'geopolymer lining' technology to reinforce the ageing, British-era storm water drains in Mumbai's island city. This proactive measure aims to strengthen the dilapidated masonry structures, some over 100 years old, to prevent monsoon flooding and road cave-ins. The project uses modern sensor-based cameras and geotagging to identify and repair corroded sections without extensive excavation.
UPSC Perspectives
Governance
This initiative by the exemplifies the functioning of Urban Local Bodies (ULBs) in city administration and infrastructure management. The [74th Constitutional Amendment Act], 1992, institutionalized ULBs and granted them constitutional status, empowering them to function as units of self-government. As per the Twelfth Schedule of the Constitution, urban planning, including town planning and public amenities like water supply and sanitation, are functions devolved to municipalities. The BMC, established under the , is exercising its mandate to maintain civic infrastructure. This move from reactive repairs (like the one on Pedder Road in 2015) to proactive strengthening using modern technology signifies a shift towards good governance, aiming for efficiency and long-term resilience. UPSC could ask about the challenges faced by ULBs in delivering their mandate, such as financial constraints, technical capacity, and inter-agency coordination, using this case as an example of successful intervention.
Disaster Management
The BMC's project is a crucial measure for urban flood mitigation, a key aspect of disaster management. The has issued specific guidelines for managing urban flooding, highlighting that rapid urbanization increases flood peaks and volumes significantly. Old and decaying drainage systems, as seen in Mumbai, are a major cause of waterlogging. By strengthening the storm water drains, the BMC is undertaking a critical structural mitigation measure. This aligns with the principles of the [Disaster Management Act, 2005], which emphasizes a paradigm shift from a post-disaster relief-centric approach to one focused on prevention, mitigation, and preparedness. The use of sensor technology for surveys demonstrates a move towards technology-driven risk assessment. For Mains, a question could link this case study to the broader challenges of urban flooding in India and the role of local bodies in implementing the NDMA's guidelines.
Economic & Geographical
From an economic perspective, this project is an investment in urban infrastructure, which is crucial for a city's economic health. Incidents like the 2012 road cave-in cause massive economic disruptions through traffic snarls and damage to property. The cost of proactive strengthening is significantly lower than the economic and social costs of a disaster. Geographically, Mumbai's coastal location and susceptibility to heavy monsoons make it highly vulnerable. The project can be seen as an adaptation strategy to the impacts of climate change, which is predicted to increase the intensity of rainfall events. Furthermore, this initiative aligns with the objectives of national programs like the [Atal Mission for Rejuvenation and Urban Transformation (AMRUT)], which focuses on improving basic urban infrastructure, including storm water drainage systems, to make cities more resilient and livable. The exam could explore the nexus between infrastructure investment, disaster risk reduction, and economic stability in large metropolitan areas.