EVALUATION OF RIVER STABILITY BY MORPHOLOGICAL ASSESSMENT
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Abstract
Streams and rivers form an essential link in the hydrological cycle. They are an open channel filled with water and sediments, a continuous processed from geo-morphological by natural reaction. Therefore, numerous hydro-morphological assessment methods have been developed in different countries during recent decades, like in the United States, Australia or German with notable differences in their aims, scales and approaches. Hydro-morphological assessment method is a deep integration between hydrology and geomorphology where inputs from several knowledge area and disciplines are brought together. It is a method that could not exist without invention across many disciplines. Health River Assessment can be used as a tool to make it easier to evaluate and design a stable channel in simple and powerful ways, as well as restoring the morphological appearance of a river to near a state of equilibrium geometry. Two methods have been selected to review the suitability and consistency of river health assessment for Malaysia’s river which are OSEPI and CSI methods. Both methods were assessed using Morphological Assessment. Based on the result, it was clearly that there are inconsistencies observed between both indexes. Hence, both methods are not suitable for evaluating the ideal river in Malaysia. Since there is no study have been done for Malaysia’s river, further study is important to establish a new Malaysia’s River Health Assessment for evaluate the river health. Java programming was successfully created to evaluate river health using CSI and OSEPI method. This programming can be a reference to produce as a new tool for future river health assessment especially for Malaysia’s River Health Assessment. River health assessment would be the best solution to alleviate those water related hazards and preserving originality of river landscape for future generation. Furthermore, it is necessary to evaluate the stability of the river before construct a bridge. A stronger foundation and factor of safety need to be increase when designing a bridge at unstable river.
