Performance On Inflow Forecasting Into Temengor Dam Using Integrated Flood Analysis System

Lariyah Mohd Sidek, MOHD IDHAM NAJID, Hidayah Basri, AZWIN ZAILTI ABDUL RAZAD, MAZLAN MOHD SOM

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Abstract

Now days, natural disaster like flood is of main concern for dam conservation as it can result in property damage and endanger lives. The prediction of flood, is one of the key in understanding its frequency of occurrence. This can be obtained using real-time rainfall, water level data of telemetry stations network, real-time forecasting. The selection of appropriate flood forecasting model needs to be based on systematic approach for flood mitigation and dam operation decision support system. The objective of this study is to optimize the flood preparation and flow response measure for dam reservoir. Inflow forecasting analysis and determination of hydrograph was carried out using Integrated Flood Analysis System (IFAS) and Hydrologic Engineering Centre-Hydrologic Modelling System (HEC-HMS). The comparison of IFAS and HEC-HMS shows that IFAS hydrograph was found to be lower than HEC-HMS hydrograph. The flow discharge generated by IFAS is found to be 505.77 m3/s and 515.2 m3/s for HEC-HMS. The similar location was used to compare each of the other hydrographs and hydrograph generated from modelling helped in determining the inflow that entered into the reservoir. It also provided lag time for the inflow before it enters onto the outlet of dam. This research finding helps in understanding that if higher value is noticed for flow due to flooding, it can be reduced by early releasing of flow from the operational dam based on the information obtained from the value of hydrograph and lag time.
Original languageEnglish
Pages1-4
Number of pages4
Publication statusSubmitted - 14 Aug 2017

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Mohd Sidek, L., NAJID, MOHD. IDHAM., Basri, H., ABDUL RAZAD, AZWIN. ZAILTI., & MOHD SOM, MAZLAN. (2017). Performance On Inflow Forecasting Into Temengor Dam Using Integrated Flood Analysis System. 1-4.