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

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Arrangements (DFAA) numbers. Numbers from the DFAA were also included (Table 5-3). A particular challenge in using the damage numbers is that they represent total storm damage across all affected communities. For example, The DFAA damage estimate for Hurricane Igor of $73M is for 93 separate communities spread out over southern and eastern Newfoundland. Applying that damage estimate evenly over the identified communities, even at a per capita scale, fails to capture the spatial variability of storm damage. As such, those damage estimates could not be used. Ultimately, only those damage estimates for singular communities were considered, adding those communities to the list to be included for the physical, direct vulnerability and indirect vulnerability analyses. Finally, those communities reporting (in the Flood events Inventory) isolated portions of the population as a result of flooding were identified and included in the final list of key communities. These communities are Codroy Valley, Cold Brook, Corner Brook, Mooring Cove, New-wesvalley, Port Blandford, and St. John‟s. Results are presented in section 5.5.1. DFAA Damage Estimates Storm# Location # Communities TYPE DFAA Damage 283 Southern and Eastern Newfoundland 93 Rainfall (Igor) $72,730,852 220 Stephenville area 11 Rainfall $28,283,786 183 St. Johns 1 Rainfall $6,083,243 239 Western Avalon Peninsula 33 Rainfall $24,522 Table 5-2. Disaster Financial Assistance Arrangements values (as provided to AMEC by WRMD) TA1112733 page 112
Reported Event Damages Storm# Location # Communities TYPE Damage (#) 283 Southern and Eastern Newfoundland 93 Rainfall (Igor) $100,000,000 121 Bishop Falls, Stephenville, Deer Lake 3 Rain and Snowmelt $34,000,000 220 Stephenville area 11 Rainfall $10,000,000 183 St. Johns 1 Rainfall $6,700,000 239 Western Avalon Peninsula 33 Rainfall $5,000,000 096 Codroy Valley 4 Ice Jam $4,000,000 127 Placentia 1 Coastal $3,000,000 166 Hermitage-Sandyville 1 Dam Break $3,000,000 237 Rocky Harbour 1 Coastal $3,000,000 193 Badger 1 Ice Jam $2,630,000 164 Burin Peninsula 6 Coastal $2,200,000 216 Flatrock to Bonavista 10 Storm Surge $2,000,000 195 West Coast 5 Rain and Snowmelt $1,400,000 169 Central Newfoundland - 9 Rainfall Baie Verte Peninsula $1,250,000 239 Placentia 1 Rainfall $1,000,000 249 Belleoram 1 Rainfall $1,000,000 237 Daniels Harbour 1 Coastal $538,000 Table 5-3. Communities with damage estimates from the Flood Events Inventory 5.4 Review and Assess Physical Hazard The term flood is used to generalize all types of water inundation events, but it is important to understand the causes of flooding present in individual watersheds. The Flood Events Inventory, Water Resources Atlas of Newfoundland, community flood risk maps (where available), and ancillary GIS (Geographic Information Systems) data were analyzed in order to determine the prevalent source of flooding for identified key communities. For example, Badger is an inland town located in northern-central Newfoundland at the convergence of the Exploits River with two smaller streams. The Flood Events Inventory indicates that the majority of floods at Badger take place in the winter and are the results of ice jams, with no recorded events during ice-free seasons (Dept. of Environment and Conservation, 2012). Whereas many Newfoundland towns are located in smaller coastal watersheds, Badger sits in a terrestrial watershed drained by the Exploits River, that covers much of inland Newfoundland (Figure 5-1). According to the Department of Environment and Conservation (Dept., 2011), the town of TA1112733 page 113
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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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Page 167 and 168: Sub-region Precipitation Climate Ch
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Page 191 and 192: Rank Community Name LGP# 82 Massey
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Rank Community Name LGP# 252 Little
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Rank Community Name LGP# 423 Thornl
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TA1112733 page 167
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FOX ISLAND RIVER-POINT GALLANTS GEO
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GEORGE'S BROOK-MILTON GOOBIES GRAND
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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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