Firm Tranche (Tf): Development And Validation Of The Methodology On Two Tits Of Tits Is Structured In Three Phases: Phase 0: Hydrological Repository For The Whole Of The Denfinition Area Of A Homogeneous Hydrological Referential Referential On The Distude Area: Data Analysis, Criticism Of Methods, Homogenization Of Hypotheses, Determination Of Flood Parameters, Hydrological Maps, Start-Up And Validation. The Firm Tranche Includes Their Studies On The Two Test Cases: Rc De La Forge (Commune Of Bessèges) Rc De La Vieille Valette (Commune Of Robiac-Rochessadoule) Phase 1: Characterization Of Watersheds And Scenarios Of Detailed Flooding Of Watersheds (Topography, Geology, Occupation Of Soil, History, Arrangements, Floods). The Hydrology (Flows, Hydrograms, Uncertainties) On The Basis Of The Standard Of The 0 Phase 0.Analysis Of The Sedimentary Potential And The Float, Description Of The Works, Hydraulic Capacity, Susceptibility To Lobs And Lobs, Definition Of Hydraulic Scenarios (Obstruction, Overflow, Emptying), Characterization Of The Stakes. And Validation Meetings. Phase 2: Cartography Of Hydraulic Vagaries Large Of The Cartographies Of The Hydraulic Hazards For The Scenarios Defined In Phase 1, According To The Expert Method Or By 2D Modeling According To The Rc (Cf. Table P.26 Of The Cctp). Restitution Of The Results, Exchanges And Validation Of The Cartographic Methodology. The Phases 1 And 2 Are In Firm Sections. Optional Tranche 1 (To1): Application Of Methodology To Other Rccette Trade Optional Train Concepts Lapplication Of The Methodology Validated In The Other Of Other Covered Streams Listed In The Cctp (Excluding Forge And Old Valette), Or 19 Rc In Total. It Includes The Characterization Of The Slopes, The Analysis Of Risks, The Definition Of Flood Scenarios, And The Cartography Of Hydraulic Hazards For Each Rc, According To The Methodology Validated In Tf. The Services Are Structured As In Tf: Phase 1 (Characterization/Scenarios) And Phase 2 (Maps). Optional 2 (To2): Rccette Trosed To The Proposal And Levaluation Of Mitigate Of The Risk Mitigation Solutions For Leve Of Rc (Test Case And Others). For Each Rc, Around Three Risk Reduction Solutions Are To Be Proposed, With Description, Cost Estimate, Gains Assessment, Effects Mapping, And Synthetic Ratio. This Phase Sappued On The Results Of The Previous Phases And Includes Restitution Meetings.
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