1. Improve drainage efficiency
- Construct pumping
stations, water gates, tunnels.
- Making sure that gullies
- Road gullies should
be checked and cleaned frequently to ensure that they are not blocked
or collapsed. Where there is a large area feeling towards a low spot,
this area should be checked to ensure that there are adequate gullies
and that they are effectively taking the water.
Construction of structures
- Flood barriers are
effective means to stop excessive amount of water rushing into low grounds.
- For example, Bangkok.
- In Bangkok, the
Department of Drainage and Sewerage has a massive construction program
of building flood barriers:
a. Flood barriers were built along the Chao Phraya River. It has a total
length of about 88 kilometers completed. It will have barrier range
from 2.5 to 3 meters above mean sea level.
b. They have elevated the Eastern King¡¦s dike.
c. Along the northern side, construction of flood barrier along Klong
Mahasawad in Thonburi.
Increase areas serve as retention basins
- In some of the existing
water retention basins, although the capacity of draining water from the
area is enough in normal circumstances, in time of excessive rainfall, it
is necessary to allocate areas to be used as retention basins for detaining
such amount of water to prevent flooding in low areas, road, and streets.
- Bangkok is running
a very successful program in the Monkey Cheek Area. It involves a public
as well as private water retention programs.
- Private Monkey
Cheek is a small retention basin in private land to detain water from
houses and housing villages by specifying in the BMA regulations and
promoting cooperation from the private sector.
- Public Monkey Cheek
is large area to detain large amount of water from canals. Presently,
there are Monkey Cheeks available to detain water of about 7 million
cu.m. the remaining areas to further accommodate 6 million cu.m. of
water has to be acquired as soon as possible.
- Land owner must not
construct bridges, fences or other permanent structures across watercourses
nor should they restrict the flow capacity by constructing erosion protection
within the channel. Nothing should be stored on the banks in such a place
or way that it may be washed away or fall in.
- Watercourses must not
be used to dispose of debris, even seemingly innocuous materials such as
grass cuttings. Such debris may combine with wind blown debris, twigs, etc.
to cause blockage of grills and thus a flooding incident.
| [Types of flooding]
Causes | [Typhoon
& Monsoon] | [Tides
& Storm] |
[Snow melt] | [Heavy
Rainfall] | [Lake]
| [Poor Water Management]
Area | [Yellow River]
| [Chang Jiang] | [USA
Effects | [Effects]
Prevention | [Do
& Don'ts] | [Reminder]Glossary
[General] | [Credits]
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School. All rights reserved.