Author(s): Muhammad Islamy Rusyda; Feni Safitri; Slamet Budiyono; Titik Wahyuningsih

Linked Author(s): Muhammad Islamy Rusyda

Keywords: Bamboo debris; Flood; Accumulations; Bridge

Abstract: Bamboo on the edge of Kelambu River has enormous potential for alleviating many environmental problems such as river bank erosion. However, during a heavy rain in November 2015 in Pemenang, North Lombok, West Nusa Tenggara caused side erosion along the upstream river. This phenomenon was drifted a significant amount of sediment and bamboo. The transported bamboo accumulated at a culvert bridge in the river and then overflowed the banks at several sections. The accumulation or jam also caused backwater rise. This condition due to the accumulation at a bridge from the view of river engineering becomes a vital factor in flood problems. A series of physical model was performed in Hydraulic Laboratory of University of Muhammadiyah Mataram in order to investigate backwater rise due to bamboo debris accumulation at the bridge. The small size of bamboo and model of a culvert bridge were tested. The bridge model can trigger an accumulation of bamboo debris by released a number of bamboo pieces. These experimental results reveal that bamboo debris accumulations formed by the model bridge contribute to backwater rise. The backwater rise and loss coefficients increase slowly with the volume of bamboo pieces trapped by a culvert bridge.

DOI:

Year: 2018