Masterplan Study on Flood Mitigation for Sungai Bentong Basin, Pahang Darul Makmur - Volume II, Main Report-Existing Conditions Issues and Planning for Mitigative Measures

1.0 INTRODUCTION: 1.1 General. 1.2 Background. 1.3 The Joint-Venture Consultant. 1.4 Purposes of the Report. 1.5 Organisation of the Report. 1.6 Goal and Objectives of the Study. 1.7 Principal Scope of Works of the Study. 1.8 Study Evolution, Outcomes and Target Achievement. 1.9 References. 2.0 STUDY AREA AND BASIN CATCHMENTS:2.1 Flood Prone Bentong Town and Floodplain. 2.2 Topography. 2.2.1 Relief. 2.2.2 Ddrainage. 2.2.3 Geomorphology and Geology. 2.3 Climate and Rainfall. 2.4 Landuse and Landcover. 2.5 Surface Soil. 2.5.1 Soil. 2.5.2 Alluvium. 3.0 FLOOD ISSUES: 3.1 The Nature of Flooding. 3.2 Recorded Floods and Rainfalls. 3.3 River Siltation and Aggradation. 3.3.1 Development in Upstream Catchment. 3.3.2 Old Mined Tailing Retention Schemes. 3.3.4 Water Quality. 4.0 EXISTING TOWN DRAINAGE AND SUNGAI BENTONG CHARACTERISTICS: 4.1Town Drainage. 4.1.1 General. 4.1.2 Drainage System layout. 4.1.3 Drainage Infrastructure Conditions. 4.2 Sungai Bentong with Bentong Town. 4.2.1 General. 4.2.2 Physical Characteristics and Conditions. 4.2.3 Bank Condition and Drainage Outfalls. 4.2.3.1 River Bank Conditions. 4.2.3.2 Drain Outfalls. 4.2.4 River Reserve Uses and Conditions. 5.0 HYDROLOGIC AND HYDRAULIC ANALYSIS: 5.1 Hydrologic Analysis and Design. 5.1.1 Catchment Parameters. 5.1.2 Rainfall Analysis. 5.1.3 Flood Analysis. 5.2 Setting Up Models. 5.2.1 Hydrologic Modelling. 5.2.2 Hydraulic Modelling. 6.0 FORMULATION OF FLOOD MITIGATION PLANS: 6.1 General. 6.2 Defining Flood Characteristics. 6.2.1 Flood Contributing Catchments. 6.2.2 Flood Level Profiles. 6.2.3 Existing River Containment Capacity. 6.3 Planning For Mitigation Alternatives. 6.3.1 Regional Storage Sites. 6.3.2 Setting of Mitigation Alternatives. 6.4 Assessment of Mitigation Alternatives. 6.4.1 Recommended Alternatives. 6.4.2 Further Analysis of Recommended Alternatives.

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