RiverĪssessments done on the Kurau River (a small river), the Muda River (a medium-size river), and the Langat River (a large river) show that these rivers have experienced different levels of erosion. (2006) equations yielded better DRs of 66.34 and 64.49%, respectively. The newly revised Ariffin (2004) and Sinnakaudan et al.
Therefore, revised equations were developed in the current study to increase the accuracy of the total bed material load equations for use in Malaysian rivers. These are the equations of Engelund and Hansen (1967) and Yang (1979), as well as existing local equations from Ariffin (2004) and Sinnakaudan et al. The Department of Irrigation and Drainage (DID), Malaysia, were found to be unsuitable because of their low discrepancy ratio (DR) values, which were below 42%. However, this method depends on the accuracy of the sediment transport equation that is used in the stable channel design. Measured field data were used as the input data for the stable channel program, which then processed the data until the input discharge was equal to the output discharge. The analytical approach was selected to calculate the suitable dimensions for a stable channel, using equations that describe the physical relation of sediment transport, flow resistance, and dynamicĮquilibrium. Assessments of a stable channel were done to evaluate the conditions of three rivers in Malaysia, using an analytical method that modifies the stable channel flowchart developed by Chang (1988) and Ariffin (2004).
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