Author(s): Mohd Kamarul Huda Samion; Mohd Fauzi Mohamad; Saiful Bahri Hamzah; Khairol Azuan Adam
Linked Author(s):
Keywords: Emergency navigation gate; Flood mitigation; Physical model; Scour protection; Tidal control gate
Abstract: The city of Kuching, Sarawak and its adjacent areas have been experiencing frequent flooding, causing hardship to the local population and significant damages to the economy. A new tidal control gate was proposed, to be located upstream of the Sarawak river, designed to regulate flow into Sarawak river and divert excess flows into adjacent flood bypass thereby preventing flooding in the city. The main objective of this study comprised of development of physical model to assess the efficiency and effectiveness of the proposed flood mitigation options focusing on verifying discharge capacity of water release structures for tidal control gate, and verifying energy dissipation and scour protection of the proposed structures. The model are comprises of 14 bays of tidal control gates, a bay of emergency navigation gate and representative sections of upstream and downstream channel of the gates. A scale of 1:50 was chosen for optimum configuration. Simulations were performed for 6 test scenarios with various combinations of water levels and gate opening to investigate the effectiveness of the proposed structure and potential scour. Based on scenarios tested, it was anticipated that the tidal control gate structures will be able to withstand the design discharge capacity. Moreover, rough boundaries as adopted in the design are effective in dissipating flow energy and may not cause significant damage to its scour protection or erosion to the downstream channel.
Year: 2014