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). 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 dynamic equilibrium. 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. However, this method depends on the accuracy of the sediment transport equation that is used in the stable channel design. Existing equations recommended by 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%. 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. (2006). 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. The newly revised Ariffin (2004) and Sinnakaudan et al. (2006) equations yielded better DRs of 66.34 and 64.49%, respectively. River assessments 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. Only the Kurau River was found to have minimal erosion and sedimentation levels. Conversely, stable channel assessments for the Muda River and the Langat River revealed that both rivers had experienced severe erosion, due to excessive sand mining. Almost all the cross section sampling points on the Muda River and Langat River were deeper than the suggested stable channel heights.

使用分析方法修改了由Chang（1988）和Ariffin（2004）开发的稳定河道流程图，对稳定河道进行了评估，以评估马来西亚三条河流的状况。选择了一种分析方法来计算稳定通道的合适尺寸，使用的方程式描述了沉积物传输，流阻和动态平衡的物理关系。所测量的现场数据用作稳定通道程序的输入数据，然后稳定程序对该数据进行处理，直到输入放电等于输出放电为止。但是，此方法取决于稳定通道设计中使用的沉积物迁移方程的准确性。马来西亚灌溉排水部（DID）建议的现有方程式，被发现是不合适的，因为它们的差异率（DR）低，低于42％。这些是Engelund和Hansen（1967）和Yang（1979）的方程，以及Ariffin（2004）和Sinnakaudan等人的现有局部方程。（2006）。因此，在本研究中开发了修正的方程式，以提高用于马来西亚河流的总床料负荷方程式的准确性。新修订的Ariffin（2004）和Sinnakaudan等。（2006）方程产生的较好DR分别为66.34％和64.49％。在Kurau河（一条小河），Muda河（一条中型河）和Langat河（一条大河）上进行的河流评估表明，这些河流遭受了不同程度的侵蚀。仅库劳河被发现具有最小的侵蚀和沉积水平。反过来，对穆达河和兰加特河进行的稳定航道评估显示，由于过度采砂，两条河流都遭受了严重侵蚀。穆达河和兰加特河上几乎所有的横截面采样点都比建议的稳定河道高度深。