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Sg Muda thumbnailMain Report (ISBN : 983-3067-17-4)

 

Researchers:

Prof. Dr. Aminuddin Ab. Ghani <This email address is being protected from spambots. You need JavaScript enabled to view it.>

Prof Dr. Nor Azazi Zakaria <This email address is being protected from spambots. You need JavaScript enabled to view it.>

Prof. Pierre Y. Julien (Colorado State University, USA) <This email address is being protected from spambots. You need JavaScript enabled to view it.>

Assoc. Prof. Dr. Rozi Abdullah <This email address is being protected from spambots. You need JavaScript enabled to view it.>

Chang Chun Kiat <This email address is being protected from spambots. You need JavaScript enabled to view it.>

Rosmaliza Ramli <This email address is being protected from spambots. You need JavaScript enabled to view it.>

Joseph Dinor <This email address is being protected from spambots. You need JavaScript enabled to view it.>

Asnol Adzhan Abd. Manap <This email address is being protected from spambots. You need JavaScript enabled to view it.>

Mohd Fazly Yusof <This email address is being protected from spambots. You need JavaScript enabled to view it.>

 

Project Summary:

The Flood Control Remediation Plan (FCRP) has been reviewed with the perspective to possibly enhance the proposed design. The objectives of this review are: (1) ensure that design cross-sections and alignment of the main river channel are economic, effective and environmentally sound; (2) propose alternative designs for identified locations to meet the above requirements; and (3) examine the long term river behaviour through model studies to minimize expensive repair works in future resulting from the new alignment.

The scope of work of this report includes a review of:

In an itemized fashion, the main conclusions of this review are specifically:

 

It is recommended not to widen the channel cross sections. Channel widening will result in lower flood stages and lower bund elevations, thus resulting in additional cost savings. These cross sections were not available to us, but further analysis should be carried out if channel widening is retained as an option. In view of excessive sand and gravel mining of the Sg Muda, the bridge pier footings at Ladang Victoria need serious and immediate attention. Pumping stations for irrigation canals have also been required on the Sg Muda as a result of the continuing degradation of the river. The degradation can be clearly attributed to the excessive sand and gravel mining of the Sg Muda. For the bank stabilization structures of the FCRP to be effective, it will be essential not to allow any in-stream sand and gravel mining activities in the future. It is proposed to allow off-stream sand and gravel mining activities at a minimum distance of 50 m from the river banks. The floodways to Sg. Merbok is not recommended because it would bring additional water to areas that were readily flooded in 1998 and 2003. The Merbok river diversion would also require long bunds and an additional barrage, which cost will not be economically justified.  The potential diversion to Sg. Korok can only be justified as an emergency measure to prevent rupture of the proposed bunds designed in this FCRP. These diversions may alleviate the problem of flood mitigation on the Muda, but at the same time may exacerbate the flooding problems in the upper watershed of Sg Perai.

 

Recommendations:

The Flood Control Remediation Plan (FCRP) has been reviewed with the perspective to possibly enhance the proposed design. The conclusions of this report demonstrate the potential for significant cost saving features as well as structural stability measures. The specific recommendations for the FCRP include the following:

 

It is recommended to recalculate the bund height and provide a more detailed estimate of the cost saving features discussed in (a), (b), and (c).

 

Study Area thumbnail       Catchment thumbnail
Study Area: Sungai Muda Lower Reach   Sungai Muda Catchment

 

NewBarrage b thumbnail       NewBarrage a thumbnail
New Barrage Under Construction

 

BedLoad a thumbnail       BedLoad b thumbnail
Bed Load Sampling @ Ladang Victoria New Bridge

 

Runoff Hydrograph thumbnail       Runoff Hydrograph Validate thumbnail
(a) Calibration    (b) Validation
Runoff Hydrograph at Ladang Victoria Discharge Station

 

HEC RAS A thumbnailLongitudinal Flood Profile for Sg Muda in HEC-RAS Model

 

HEC RAS B1 thumbnail       HEC RAS B2 thumbnail       HEC RAS B3 thumbnail
Cross Sections for Sg Muda in HEC-RAS Model

 

HEC RAS C thumbnailComparison of 2003 Flood Water Level and Proposed Bund Height

 

Lateral Migration A thumbnail

Lateral Migration B thumbnail       Lateral Migration C thumbnail
(a) CH 23.0   (b) CH 21.9
Lateral Migration @ Kg Lahar Tiang (FLUVIAL-12 Model)

 

Lateral Migration D thumbnail

Lateral Migration E thumbnail       Lateral Migration F thumbnail
(a) CH 15.4   (b) CH 13.1
Lateral Migration @ Bumbong Lima (FLUVIAL-12 Model)