Real-Time Flood Forecasting Project Using Info Works FloodWorks (Case Study: Sungai Ulu Melaka, Langkawi, Malaysia)

摘要

Issues of flooding are one of the main issues capturing our concern these recent years. The probability of flooding gets more frequent and intense due to rampant development. The scenario is worsened under the pressure of impact of climate variability. Various methods are adopted to minimize the impact of flooding such as the structural and non-structural approaches. However, the non-structural method through flood forecasting is getting popular in flood management particularly in developing countries like Malaysia following the advancement of the information technology and communication. A pilot project for real-time flood forecasting is selected in Sungai Ulu Melaka, Langkawi, Kedah, Malaysia where it experienced flooding in the past. The major land uses are 65% of agriculture which covers mostly paddy fields and 35% of Forest Reserve in upstream. The total catchment of Sungai Melaka, Langkawi is approximately 74. 8 km2 with the river length at 8.8 km and width roughly 20 to 28 m. Major Tributaries of the study area are Sungai Limbung, Sungai Saga, Sungai Korok, Sungai Bukit Hantu and Sungai Ulu Melaka. A river flood forecasting model are built which connects Hydraulics Model from InfoWorks River Simulation, Probability Distribution Model with real-time telemetry rainfall station and operational flood forecasting system model using InfoWorks FloodWorks. The model is useful to forecast the flood events and served as a decision making tools for implementing agencies, local authority for emergency evacuation plan.