SAMOA FLOOD MANAGEMENT ACTION PLAN 2007-2012 - Pacific ...

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Foreword[to be completed by Water Resource Division (MNRE)]Flood management Action Plan <strong>2007</strong>iv
Table of Contents1. Introduction ................................................................................................................. 11.1. Scope ................................................................................................................... 11.2. Purpose................................................................................................................ 31.2.1. Goals and Objectives .................................................................................... 31.3. Guiding Principles ................................................................................................ 41.4. Frameworks that Encompass the FMAP .............................................................. 51.4.1. The Regional Context.................................................................................... 51.4.2. The National Context..................................................................................... 51.4.3. Issues to be addressed ................................................................................. 61.4.4. Existing Policies and Legislation that Provide for Flood Management ........... 71.4.5. Linkages with other National Projects ............................................................ 71.5. Implementation Strategy ...................................................................................... 91.5.1. Implementing Agencies ................................................................................. 91.5.2. Coordinated In-country Implementation, Monitoring and EvaluationProgramme ................................................................................................................. 92. Background to flood management in the Vaisigano River catchment and Apia 112.1. Introduction ........................................................................................................ 112.2. Hydrological monitoring in the Vaisigano River catchment ................................. 112.2.1. Rainfall stations ........................................................................................... 112.2.2. Flow monitoring stations ............................................................................. 122.3. Elements at risk of flooding in the lower Vaisigano floodplain ............................. 122.4. Previous flood risk management studies and measures ..................................... 133. Flood mitigation measures ..................................................................................... 163.1. Introduction ........................................................................................................ 163.2. Structural mitigation measures ........................................................................... 173.2.1. Flood embankments and walls .................................................................... 183.2.2. Flood storage .............................................................................................. 213.2.3. By-pass or diversion channel ...................................................................... 253.2.4. Increasing channel conveyance .................................................................. 273.2.5. Pumping ...................................................................................................... 283.2.6. River maintenance ...................................................................................... 283.2.7. Flood proofing of buildings .......................................................................... 293.3. Non-structural mitigation measure options ......................................................... 303.3.1. Development control ................................................................................... 303.3.2. Flood forecasting......................................................................................... 363.3.3. Flood warnings ............................................................................................ 373.3.4. Flood insurance........................................................................................... 37Flood management Action Plan <strong>2007</strong>v
Page 1 and 2: SAMOAFLOOD MANAGEMENTACTION PLAN200
Page 3: AcknowledgementThe development of t
Page 7 and 8: Vaisigano River ...................
Page 9 and 10: 1. IntroductionThis Flood Managemen
Page 11 and 12: 1.2. PurposeThe purpose of the Plan
Page 13 and 14: 1.4. Frameworks that Encompass the
Page 15 and 16: 1.4.4. Existing Policies and Legisl
Page 17 and 18: 1.5. Implementation StrategyThe Pla
Page 19 and 20: 2. Background to flood management i
Page 21 and 22: 2.4. Previous flood risk management
Page 23 and 24: Figure 2-2: Flood wall and bank pro
Page 25 and 26: een set up using the HEC-HMS and HE
Page 27 and 28: Location of floodembankmentsFigure
Page 29 and 30: Table 3-4 provides an estimate of t
Page 31 and 32: Table 3-6:Return period(years)Numbe
Page 33 and 34: o Estimate the volume of the fill r
Page 35 and 36: Table 3-7:Returnperiod(years)Prelim
Page 37 and 38: Recommended actions:o A detailed as
Page 39 and 40: Figure 3-9: Flood depth map for the
Page 41 and 42: The degree of flood hazard to peopl
Page 43 and 44: Figure 3-12: Flood hazard map for t
Page 45 and 46: Recommended actions:The following a
Page 47 and 48: process guidance through which the
Page 49 and 50: Table 3-10: Actions required for no
Page 51 and 52: OBJECTIVE KEY ACTIONS EXPECTED RESU
Page 53 and 54: OBJECTIVE KEY ACTIONS EXPECTED RESU
Page 55 and 56:
OBJECTIVE KEY ACTIONS EXPECTED RESU
Page 57 and 58:
Page 59 and 60:
GOAL 5 : SUSTAINABLE WATERSHED MANA
Page 61 and 62:
Page 63 and 64:
6. AnnexesAnnex 1: The Process carr
Page 65 and 66:
sustainable development.DISASTER WA
Page 67 and 68:
Annex 3: Stakeholder Consultation W
Page 69 and 70:
SOPACDr. Netatua PelesikotiSustaina
Page 71 and 72:
Flood management Action Plan 2007 6
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