Abstract
In general, the profile of longitudinal river flow can be divided into 3 zones i.e. source zone is the headwater or upstream part of the river, transition zone or middlestream and floodplain zone or downstream zone. Urban area usually located at downstream zone which is river section has a meander pattern therefore its many problem prone to this area, for instance, bank erosion, flood disaster at the housing area along the meander curve. Once of approach to solve this problem, especially minimize of flood disaster, is normalized the river with cutting off meander curve. However, there are several studies show that cutting off the curve of meander results in channel instability on sediment transport and environment problem. Therefore, the study of the relation between meander transformation and riverbed soil classification should be needed to avoid a misstep. Area of study is Pesanggrahan River located at the western part of Jakarta Province. When viewed from the entire river section, Pesanggrahan River passing through an urban area that has been developed and riverbed material composition at downstream zone usually are clay, silt and sand. The previous research findings concluded that soil composition with a high percentage of silt, i.e. sandysilt, would be change rapidly compare than soil composition with a low percentage of silt, i.e. clayeysilt. Hence, the hypothesa of this research is meander curve with soil classification low percentage of silt are more stable than soil composition of high percentage of silt and meander curve that have not transform for a long time and it’s not recommended to cutting off to maintain the watershed ecosystem as a whole.
Published Version
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