Score:
9.5/15
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Topper’s Copy
GS3
Disaster Management
15 marks
Recurring urban floods in Indian cities reflect not only extreme rainfall but also failures of urban planning and governance. Examine the causes of urban flooding and suggest measures for building climate-resilient cities.
Student’s Answer
Evaluation by SuperKalam
Demand of the Question
- Examine causes of urban flooding (natural and governance/planning failures)
- Suggest measures for climate-resilient cities
- Address both extreme rainfall and urban planning/governance failures
What you wrote:
Urban flooding is seldom due to rainfall alone. Rather, Extreme Rainfall + poor urban governance = Urban flooding. The 2005 Mumbai floods reflected the unpreparedness of civic administration which led to 'urban flooding' being recognized as a separate category needing intervention by the NDMA.
Urban flooding is seldom due to rainfall alone. Rather, Extreme Rainfall + poor urban governance = Urban flooding. The 2005 Mumbai floods reflected the unpreparedness of civic administration which led to 'urban flooding' being recognized as a separate category needing intervention by the NDMA.
Suggestions to improve:
- Could strengthen by briefly mentioning the scale of the problem (e.g., over 40 major Indian cities face annual flooding, affecting millions of urban residents).
What you wrote:
Causes -
Natural factors:
* Climate change & monsoon variability - early onset of monsoon + multiple western disturbances induce short-duration-high intensity rainfalls.
Ex: In Chennai, 1-day extreme rainfall has increased by 10-15 percent over the past century.
* Rapid urbanisation and unplanned cities.
* Rapid surface water accumulation due to concrete structures and outdated drainage systems affected by siltation.
* Expansion of real-estate & loss of blue-green cover - degradation of natural flood buffers like Pallikaranai marshland in Chennai and Mumbai's green cover reduction by 90% in past 2 decades.
Causes -
Natural factors:
* Climate change & monsoon variability - early onset of monsoon + multiple western disturbances induce short-duration-high intensity rainfalls.
Ex: In Chennai, 1-day extreme rainfall has increased by 10-15 percent over the past century.
* Rapid urbanisation and unplanned cities.
* Rapid surface water accumulation due to concrete structures and outdated drainage systems affected by siltation.
* Expansion of real-estate & loss of blue-green cover - degradation of natural flood buffers like Pallikaranai marshland in Chennai and Mumbai's green cover reduction by 90% in past 2 decades.
Suggestions to improve:
- Could add governance dimensions like weak enforcement of building codes (e.g., unauthorized constructions in flood-prone areas reduce drainage capacity by 30-40%)
- Can include administrative failures such as poor inter-agency coordination between municipal corporations, drainage boards, and disaster management authorities during flood events
What you wrote:
Measures -
* Impacts of climate extremes can be reduced by good forecasting tools like Doppler radars, risk-mapping, revamping drain infrastructure and waste management to prevent clogging.
* Enforcing no-development zones within 500 m of wetlands and floodplains.
* Subsidise expansion of blue-green infrastructure through providing tax-credit to private investments and viability gap funding for public-private partnerships in such projects.
* Creating Climate-specific Action Plans (CAPs) - recent example - pilot project on canal restoration bonds in Kochi focuses on flood management.
Measures -
* Impacts of climate extremes can be reduced by good forecasting tools like Doppler radars, risk-mapping, revamping drain infrastructure and waste management to prevent clogging.
* Enforcing no-development zones within 500 m of wetlands and floodplains.
* Subsidise expansion of blue-green infrastructure through providing tax-credit to private investments and viability gap funding for public-private partnerships in such projects.
* Creating Climate-specific Action Plans (CAPs) - recent example - pilot project on canal restoration bonds in Kochi focuses on flood management.
Suggestions to improve:
- Could emphasize governance measures like establishing unified flood management authorities (e.g., Chennai's Greater Chennai Corporation model integrating multiple agencies under single command)
- Can include urban planning reforms such as mandatory Environmental Impact Assessments for large developments and revised Floor Space Index norms in flood-prone areas
What you wrote:
Finally, adaptive translation of global frameworks such as water-sensitive cities, China's sponge cities, and Netherlands' Room for River, etc., into locally situated practices would strengthen stormwater systems and protect urban commons ensuring climate-resilient cities.
Finally, adaptive translation of global frameworks such as water-sensitive cities, China's sponge cities, and Netherlands' Room for River, etc., into locally situated practices would strengthen stormwater systems and protect urban commons ensuring climate-resilient cities.
Suggestions to improve:
- Could strengthen by linking to national missions like Smart Cities Mission's climate resilience components or referencing India's National Action Plan on Climate Change urban adaptation strategies.
Strong technical understanding with good use of examples and data. However, the governance dimension - a key question demand - needs more emphasis alongside the well-covered environmental aspects.
Demand of the Question
- Examine causes of urban flooding (natural and governance/planning failures)
- Suggest measures for climate-resilient cities
- Address both extreme rainfall and urban planning/governance failures
What you wrote:
Urban flooding is seldom due to rainfall alone. Rather, Extreme Rainfall + poor urban governance = Urban flooding. The 2005 Mumbai floods reflected the unpreparedness of civic administration which led to 'urban flooding' being recognized as a separate category needing intervention by the NDMA.
Urban flooding is seldom due to rainfall alone. Rather, Extreme Rainfall + poor urban governance = Urban flooding. The 2005 Mumbai floods reflected the unpreparedness of civic administration which led to 'urban flooding' being recognized as a separate category needing intervention by the NDMA.
Suggestions to improve:
- Could strengthen by briefly mentioning the scale of the problem (e.g., over 40 major Indian cities face annual flooding, affecting millions of urban residents).
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