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Researchers:
The objectives of the study are:
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To evaluate
the applicability of HEC-6 programme to predict sediment transport rates
and flood levels for rivers in Malaysia
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To appraise
the existing sediment transport equations
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To develop
sediment transport equations for rivers in Malaysia
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To develop
flood risk map (Pari River, Ipoh)
Four rivers were selected as study sites namely
Pari River (Ipoh), Kerayong River (Kuala Lumpur), Kulim River (Kulim) and
Malacca River (Mallaca City). Total bed material loads were collected
from these rivers. The appraisals of the existing sediment transport
equations show that Yang, Ackers & White and Graf equations are suitable for
the prediction of sediment transports in these rivers. A number of
equations were also developed for the prediction of sediment transport rates
using the collected sediment transport data especially for low to medium
flows. Further data collection for high flows are being carried out.
During the study period, a 50-year flood
occurred at Pari River on the 19th November 1997 causing
structural damages to the rigid bank walls on both sides of the river
especially at bends. Subsequently, the flood hydrograph was used to
calibrate the HEC-6 model to predict the recorded flood water levels.
A good agreement was found between the predicted and observed water levels
using Yang equation. Another model namely, FLUVIAL-12 was also used to
predict the erosion and deposition trends during the flood. The
calibration results using Yang and Graf equations show that the FLUVIAL-12
model could well predict the observed erosion and deposition patterns
along the river including at the bends. The results from the
calibration of HEC-6 and FLUVIAL-12 models were then used for the
rehabilitation work of Pari River.
A flood risk
map was also developed for Pari River to represent the effect of the flood
event by developing an ArcView GIS extension namely AVHEC-6.AVX integrating
the HEC-6 model within GIS environment. The extension has the
capability of analyzing the computed water surface profiles generated from
HEC-6 model and producing a related flood map for Pari River in the ArcView
GIS
The study was conducted by
ten postgraduate students (3 PhD, 7 MSc) and 20 papers have been presented
at national and international conferences. Three articles have been published in international journals:
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Chang, C. K., Ab. Ghani,
A., Zakaria, N. A., Abu Hasan, Z. & Abdullah, R. (2005). Sediment
Transport Equation Assessment for Selected Rivers in Malaysia,
International Journal of River Basin Management, IAHR, Vol. 3, No.3,
pp. 203-208. ISSN 1571-5124 <Download>
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Sinnakaudan, S. K., Ab.
Ghani, A., Ahmad, M. S. S., & Zakaria, N.A.(2006). Multiple Linear
Regression Model for Total Bed Material Load Prediction, Journal of
Hydraulic Engineering, American Society of Civil Engineers (ASCE),
Vol. 132, No. 5, May, pp. 521-528. ISSN 0733-9429 <Download>
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Sinnakaudan, S., Ab
Ghani, A., S. Ahmad, M. S., & Zakaria, N, A. (2003). Flood Risk Mapping
for Pari River Incorporating Sediment Transport. Journal of
Environmental Modeling and Software, Vol. 18, No. 2, pp. 119-130.
ISSN 1364-8152 <Download>
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1997 Flood
Present condition of
Pari River
River Profile
Sand Dredging and
Silibin Bridge
Sand Dredging at the Confluence of Kinta River
SedFlood Model
SedFlood GUI
3D Flood Risk Map
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