1. Hatirjheel Integrated Project: A Multi-purpose Urban Amenity
M. Shah Alam Khan
Professor, IWFM, BUET
Institute of Water and Flood Management.
Bangladesh University of Engineering and Technology

2. Project Objectives Stormwater detention
Extending east-west road connectivity
Preserving urban water ecosystem and environment
Domestic wastewater management
Water-based recreation and green corridor
Water taxi

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31. Composite satellite photo of the area
(Nasrin, 2014)

32. Catchment Boundary and Sub-catchments
(Nasrin, 2014)

33. Land Use Pattern
(Nasrin, 2014)

34. Demography
Landform and Land Use
Climate
Stormwater Management Practices
Function of detention basin: retain storm runoff temporarily and gradually discharge downstream as gravity flow
Hatirjheel-Begunbari detention basin: largest stromwater detention basin in Dhaka
Hydrologically linked to Dhanmondi, Gulshan and Banani lakes, and Mohakhali khal (box culvert).
Combined flow discharged through Rampura regulator, gravity drainage through Begunbari Khal to the Balu river
Catchment area: about km2
Regulator constructed after 1988 flood

35. Stormwater detention capacity and function of the Hatirjheel basin reduced significantly because of encroachment, solid waste dumping, etc.
Hatirjheel Integrated Project => Mainly to restore the detention area and for improved stormwater management
Hatirjheel Integrated Project
Hatirjheel lake: km2 area
Implementation partners: RAJUK, DWASA, LGED, BUET, BD Army Corps of Engineers
Major Construction Work: Service road, Express road, 11 SSDS/CSO, 4 Bypass sewers, and bridge, culvert, viaduct, etc.

36. Water Level and Rainfall
Water level hydrograph and rainfall for 1998
Mean water level hydrograph and 1:5 year rainfall
(Nasrin, 2014)

37. Present Gate Operation Rule
Maximum Allowable water level in the system: +5.5 m PWD
Gravity-drainage (gates open) maintained until the external water level rises to +5.0 m PWD
Gates are closed normally in early July & temporary pumping is required to maintain the maximum water level below +5.5 m PWD
Gates are opened again when external water level falls below +5.5 m PWD & internal water level > external water level
During two ‘critical periods’ (July 10 – 20 & September 10 – 25), gates are closed when external water level is +5.0 m PWD instead of m PWD
In a ‘normal’ flood year, the gates are closed from July to September

38. Inundated area at different inundation depths
Inundation depth (m)
Area (km2)
Area (%) 3
0.14
9.2 4
0.25
16.12 5
0.41
26.8 6
0.74
47.9
Total
1.54
100
(Nasrin, 2014)

39. Flood Damage (Residential)
Tangible damage
Annual income and overall flood damage
Income and flood damage for pucca households
(Nasrin, 2014)

40. Flood duration and flood damage
Flood depth and damage
Flood duration and flood damage
(Nasrin, 2014)

41. Intangible damage Intangible damage based on respondents’ perception
Impact
Increase (+)
Decrease (-)
Remains Same (0)
Unsure (x)
Employment opportunities 0%
88.6%
11.4%
Income
77.1%
22.9%
Consumption of food items
85.7%
14.3
Purchase of industrial items
82.9%
17.1%
Prices of food items
100%
Prices of industrial items
91.4%
8.6%
Wage rates in industrial activities
(Nasrin, 2014)

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