Flood Risk and Vulnerability Analysis Project - Atlantic Climate ...

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Reduce the risk to public safety during flood events Reduce incidents of flooding, Reduce susceptibility to flood damage, Mitigate the impacts of flooding, and Preserve the natural resources of flood plains. 6.2.1 Structural and Non-Structural Strategies Strategies can be Structural (e.g., dams, levees, shore stabilization), or Non-Structural (e.g., building codes, regulations and flood forecasting warnings). It should be noted that although flood insurance is not currently available in Canada, it is listed here as a Non-Structural strategy. Structural strategies can effectively address site or location specific threats, such as reducing the flood frequency along a river corridor or limiting erosion along a coastline. Structural strategies utilize engineering approaches to make defined improvements to address a defined need. However, Structural strategies are generally higher cost flood mitigation strategies than Non-Structural mechanisms. Given the scope of this evaluation and available data, this report does not specify locations for structural mitigation measures in the Sub-regions. Instead, this report provides general guidance that those communities for which structural mitigation measures may be applicable. Communities should consider identifying locations, through more detailed evaluations, where construction of structural practices may be appropriate, as part of a more comprehensive flood mitigation strategy. Table 6-4 also includes a larger set of Non-Structural strategies. Although there may be structural components to several of these strategies, Non-Structural strategies are generally more programmatic in nature, often requiring contributions by regional and local government entities. For instance, building code standards define structural components required for development, yet because the components are the result of policy decisions that primarily affect the development process and a site‟s usability, building codes are considered a Non-Structural strategy. Local and Provincial officials should first consider the benefits of Non-Structural strategies, before Structural ones, as their costs are typically significantly lower. This is especially the case where population densities and infrastructure investments are relatively low and the benefits of large engineered structures, in terms of flood loss mitigation, are also low. TA1112733 page 142
6.2.2 Potential Strategies Table 6-4 presents a list of Mitigation Strategies, organized into Structural and Non-Structural categories. Following the table are recommendations specific to each Sub-region that communities within each Sub-region could consider as their first set of options to reduce their risk of flooding events, minimize flood damages and threats to public safety, and expedite the post-flood recovery process. Although Table 6-4 includes the most common strategies in use throughout Canada, it is not meant to be exhaustive. Decision makers should maintain their flexibility to determine if additional measures will be effective for their specific circumstances and flood vulnerabilities. TA1112733 page 143
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Atlantic Climate Adaptation Solutio
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GOVERNMENT OF NEWFOUNDLAND AND LABR
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June 13, 2012 AMEC Project #TA11127
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EXECUTIVE SUMMARY The Government of
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Assessing the Need for New or Updat
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SUMMARY The Government of Newfoundl
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Land Use Change A pre-cursor effort
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fresh water from the Arctic south a
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watershed, which appears to already
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RECOMMENDATION SUMMARY Infrastructu
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7. It is recommended that WRMD deve
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TABLE OF CONTENTS PAGE EXECUTIVE SU
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7.3 References for Assess Need for
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LIST OF TABLES Table 2-1. Flood Eve
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LIST OF FIGURES Figure 2-1. Water R
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1. OVERVIEW In the 1980‟s, under
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Floodway Floodway Fringe Climate Ch
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2. Task B - Updated Flood Events In
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Management Framework for Canada def
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The „Types of Events‟ field is
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Field Damage Estimate by Community
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Arrangements 10 (DFAA) damage estim
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Storm # General Location Year Seaso
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2.3.2 Weather Events - Annual Occur
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Figure 2-6. Storm Occurrence by Yea
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Figure 2-8. Storm Occurrence by Mon
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Type of Event (Grouped) % Occurrenc
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Figure 2-11. Flood Occurrence by Se
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Coastal Flooding Coastal Flooding a
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September is associated, presently,
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3. Task C - Assess Existing Flood R
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Gaudon‟s Brook / Cold Brook Steph
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3.3.2.1 Community Flood Watersheds
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3.3.2.3 Earth Observation for Susta
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Figure 3-3. Graphical model of land
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Original EOSD Classes Shadow Water
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surrounding areas were also evaluat
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Watershed Community Total Area Fore
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correct). Of the 90 accuracy assess
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Figure 3-6. GCM sectors selected to
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Figure 3-7. Percentage change of pr
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The results for temperature are sim
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Area Labrador West Central East Sum
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West sees slightly larger winter in
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These increases, though slight, in
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Classification Maximum Sustained Su
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Since air flow around high pressure
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10 9 8 7 6 Total Number of Tropical
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One of the reasons for this increas
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Figure 3-19. Frequency of Named Sto
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Figure 3-21. Change in Mean Sea Lev
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The net long term sea level effect
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Southern Oscillation (ENSO). The AM
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middle of North America as it would
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e a higher incidence of tropical st
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extreme will be considered. Areas t
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Storms weaken rapidly once they mak
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Figure 3-27. Selected Hurricane and
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o o a Category 2 Hurricane making l
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o Because winter temperatures show
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Page 141 and 142: 5.2 Methods The methodology used fo
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Page 155 and 156: Community Access Notes Confinement
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Page 161 and 162: source of flood vulnerabilities com
Page 163 and 164: Figure 6-2. Newfoundland Digital El
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Page 167 and 168: Sub-region Precipitation Climate Ch
Page 169 and 170: Analysis of the socio-economic data
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Page 175 and 176: 6.3 Mitigation Recommendations Base
Page 177 and 178: Table 6-5 presents the range of ave
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Page 187 and 188: Music and Caya, 2007 Richter and Ba
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Page 191 and 192: Rank Community Name LGP# 82 Massey
Page 193 and 194: Rank Community Name LGP# 252 Little
Page 195 and 196: Rank Community Name LGP# 423 Thornl
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Page 199 and 200: FOX ISLAND RIVER-POINT GALLANTS GEO
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Flood # Storm # General Location St
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11. Appendix D IDF Curves Report TA
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Development of Projected Intensity-
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Storm Duration Development of Proje
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1979 1983 1987 1991 1995 1999 2003
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Mean Annual Total Precipoitation, m
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Storm Duration Storm Duration Devel
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Storm Duration Storm Duration Storm
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Codroy Valley Watershed Topography
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Parson's Pond Watershed Topography
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Rushoon Watershed: Topography Eleva
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Eastern Watersheds, East Topography
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Eastern 54°0'0"Watersheds, West To
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Central Watersheds, 57°0'0"W East
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Central 58°0'0"W and Western Water
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Badger and Rushy 58°0'0"W Pond Wat
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Cox's Cove Watershed: Land Cover 58
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Ferryland Watershed Land Cover 60°
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49°0'0"N Glenwood-Appleton 56°0'0
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Parson's Pond Watershed: Land Cover
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Rushy Pond Watershed: 57°0'0"WLand
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Stephenville Crossing Watershed: La
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Whitbourne and Brigus Watersheds: L
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Eastern Watersheds 2: Land Cover Ha
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Eastern Watersheds, East: Land Cove
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