YANGON’S STORMWATER MANAGEMENT ISSUES
PRESENTED BY
GROUP-4
OUTLINES
DRAINAGE SYSTEM
SOURCE OF FLOOD
THE STEPS BEING TAKEN NOW
SUGGESTIONS
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
YANGON CITY MAP
RIVERS OUTLETS AROUND YANGON CITY
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.)
IN NEED OF SLUICE GATES IN NEED OF TECHNOLOGY
UNLINED CHANNELS UTILITIES IN THE CULVERTS
INADEQUATE DEPTH OF BOX CULVERT
3. CLIMATE CHANGE
More Frequent Storms
More Intense Rainfall
4. TIDAL WATER
River Around
Spring and Neap Tide
Water Gate Facility
Ground Elevation
Flooding by Tidal Water at Lanmadaw-Kanar Junction
Tidal Water During High Tide Day
Rainy Season Hot Season
Upper Pansodan Channel
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
SOLID WASTES LAW ENFORCEMENT
STEPS BEING TAKEN TO PREVENT FLOOD
MANUAL DERDGING MANUAL DREDGING
DREDGING BY MECHINE DREDGING BY MACHINE
DREDGING OF BOX-CULVERTS AT MYANMA GONYE ROAD
RECONSTRUCTION OF CULVERT
DREDGING A CHANNEL BY MECHINE
23street Slide gate
Slide Gate At Kanar Road
22-23th Street Water Gate (Latha Township)
Water Gate At River Bank(Example)
Yangon River Exit
MANUAL DREDGING WORKS
SUGGESTIONS
Lining of River Outlet Channels
Reconstruction of Some Drainage Facilities
Educating Civilians
Law Amendment
Water Gates, Pumps etc
Technical Transfer or Help
THANKS YOU FOR YOUR KIND ATTENTION