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DRAINAGE SYSTEM
• The stormwater of the drainage basin is drained out by natural gravity flow.
• Most of the outlets are without sluice gates and affected by tidal water.
• The drainage system was built when Myanmar was under British rule.
Yangon City
CHINA
THAI LAND
INDIA
BANGLADEAH
Yangon City, the Second Capital of Myanmar
Yangon Division
• 6 millions of population
• 33 townships and 612 square kilometer wide
SOURCE OF FLOOD
1. POPULATION GROWTH EFFECT
Rapid Urbanization
Increase in impervious surface
Loss of catchment areas
0
2
4
6
8
1983 1995 2000 2013
POPULATION ( million)
2. Existing drainage structure
Unlined Open Channel
Lack of sufficient sluice gates
Limitations in use of sluice gates
Inadequate depth of culvert
Utilities (water pipes, cables, etc.)
3. CLIMATE CHANGE
More Frequent Storms
More Intense Rainfall
4. TIDAL WATER
River Around
Spring and Neap Tide
Water Gate Facility
Ground Elevation
5. DISPOSAL OF GARBAGE
Lack of discipline in disposal of garbage
Weakness in law enforcement
Requirement of sufficient trash cans
Educative campaign to the public
SUGGESTIONS
Lining of River Outlet Channels
Reconstruction of Some Drainage Facilities
Educating Civilians
Law Amendment
Water Gates, Pumps etc
Technical Transfer or Help
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