swma 3 presentation

8/6/2019 SWMA 3 Presentation

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DEVELOPMENT OF FLOOD HAZARD MAPPING N A

T I

( N A

H

MI N

I S

N A L H Y D R A

I M )

T R Y OF N A T

L I C R E S E A

R A

L R E S O U

C H

I N S T

I T U T

C E S A N

D E

E OF MA L A Y

V I R ON ME N T

I A ( N R E )

The views expressed in this paper/presentation are the views of the authorand do not necessarily reflect the views or policies of the Asian Development

1By: LIEW YUK SANRESEARCH OFFICER

an , or ts oar o overnors, or t e governments t ey represent.ADB does not guarantee the accuracy of the data included in this paper and

accepts no responsibility for any consequence of their use. Terminology usedmay not necessarily be consistent with ADB official terms.



•

• STUDY AREA

•

• OUTPUT OF STUDY

2



• To develope a complete river model using

InfoWorks River Simulation consisting ofhydrological, hydraulic and ground model(Covering main river system and flood

plain)• To generate a flood risk map based on

various return eriod

• To provide quick results on flood impact

catchment. 3



STUDY AREA

• Located at northern part of the state of.

• Catchment area: 1960km2

• The main river: River Selangor

• Length of river: 110km• Major tributaries are River Kerling, River

Kubu River Renin River Batan Kali River Buloh and River Sembah.

4



5



Selangor River Catchment

UPSTREAM

kerlingID

HuluID

Batang Kal iID

riz rj musaID

DOWNSTREAMSUNGAI SELANGOR

sembahflowID

6



•

with the ground elevation of the flood plain

river.

the adjacent Klang Valley development is

near future.

7



FLOOD SIMULATIONS

9

http://100yearsslow.avi/

http://100yearsslow.avi/



Start – 0 hour After 20 hours

After 60 hoursAfter 40 hours

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Flood Risk Map With Different

according to Land Use

ARI of 100 years

ARI of 50 years 11



• Automatic flood map delineation can be

done with the combination of hydrological,hydraulic and ground model.

• Flood Risk Map could be a quick decision

su ort s stem tool to stud the im act ofeither human activities(planned/unplanned)at catchment area of a river s stem.

12



THANK YOU

13

swma 3 presentation

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