Dhaka needs higher investment to develop infrastructures for tackling water-logging in future as the changing pattern of climate indicates that it will face more erratic rainfall in coming days, a world Bank study has said.
“Climate and Disaster Resilience of Greater Dhaka Area: A Micro Level Analysis” also says that the city will need Tk2.7bn investment in storm-water drainage pumps, drainage pipe clearing and other measures to reduce water-logging in every ward within 12 hours.
The estimated new investment will be the in addition to the improvements in the drainage infrastructure proposed in Dhaka’s Detailed Area Plan (DAP) and Sewerage Master Plan and Narayanganj City Corporation’s Concept Vision Plan.
Floods and water-logging in Dhaka regularly disrupt lives and livelihoods and most adversely affect the fringe areas and slums. With more frequent and intense rainfall, climate change is likely to further aggravate flooding and water-logging in the coming decades.
The study calculated potential damages from water-logging between 2014 and 2050 will be TK110bn in Dhaka, if climate change is not considered. In a changing climate with more intense rainfalls, the loss will be Tk139bn between 2014 and 2050.
The incremental cost of adaptation for Dhaka to climate change by 2050 will be about Tk1.3bn.
“A mega city like Dhaka needs smart investments to meet the demands of a growing population and rapid urbanisation in a changing climate. Mainstreaming disaster risk reduction and climate change adaptations in planning will help the city improve service delivery and become truly a growth center,” said Christine Kimes, acting country head of World Bank Bangladesh.
As different parts of Dhaka and its surrounding areas vary significantly in terms of infrastructure, facilities and resilience to flood and water-logging, the study assessed Dhaka’s local preparedness for urban flood emergencies at ward level, measuring Climate Disaster Resilience Index (CDRI).
The analysis found the overall CDRI for Dhaka is 2.35 in a five-point scale, indicating a modest level of resilience. Dhaka-Narayanganj-Demra (DND) and Kallyanpur’s CDRI fall below the city average.
In addition to the additional investment, the city needs proper coordination among the different service providers to make it liveable, said Annisul Huq, mayor of Dhaka North City Corporation while addressing the report launching programme yesterday at World Bank’s residence office.
This study covered Eastern Dhaka, Goranchatbari, Kallyanpur, Central Dhaka, Old Dhaka, DND and Narayanganj.
The baseline of the study took the historic September 2004 rainfall event (341mm rainfall in 24 hours).
The study was conducted by the Institute of Water Modeling, Buet and Brac University and funded by Bangladesh Climate Change Resilience Fund.