Introduction:
Urban floods are often triggered by intense rainfall, but the disaster is largely human-made. Rapid urbanisation, ecological degradation and inadequate planning have transformed natural hazards into recurring urban crises, highlighting the need for resilient and sustainable city development.
Role of Poor Urban Planning:
- Unplanned urbanisation has led to construction on floodplains, low-lying areas and natural drainage channels.
- Inadequate stormwater drainage and poor maintenance result in waterlogging even after moderate rainfall.
- High concretisation reduces groundwater recharge and increases surface runoff.
- Weak enforcement of master plans and building regulations encourages encroachments.
- Poor solid waste management blocks drains and aggravates flooding.
Loss of Ecological Buffers:
- Encroachment and reclamation of wetlands, lakes and urban ponds reduce natural water storage capacity.
- Destruction of mangroves, floodplains and green spaces weakens flood moderation.
- Declining vegetation lowers infiltration and increases runoff.
- Climate change-induced extreme rainfall further intensifies flooding where ecological resilience has been compromised.
Way Forward:
- Adopt sponge city principles with permeable surfaces and rainwater harvesting.
- Restore wetlands, urban lakes and natural drainage networks.
- Integrate GIS-based flood-risk mapping into urban planning.
- Strengthen urban local bodies through scientific planning, strict land-use regulation and climate-resilient infrastructure.
Conclusion:
Urban flooding reflects a failure of governance as much as a failure of nature. Building resilient cities requires treating ecological assets as critical urban infrastructure and embedding disaster risk reduction into every stage of urban planning.
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