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

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June 13, 2012 AMEC Project #TA1112733 To: Attn: Dear Re: Department of Environment and Conservation Government of Newfoundland and Labrador 4th Floor, Confederation Building, West Block PO Box 8700, St. John's, NL Canada A1B 4J6 Mr. Amir Ali Khan, Ph.D, P.Eng Manager Hydrologic Modelling Section Water Resources Management Division Mr. Khan Flood Risk And Vulnerability Analysis Project Draft Report AMEC Environment & Infrastructure, a division of AMEC Americas Limited (AMEC), is pleased to provide the attached final report for the above noted project. Yours truly, AMEC Environment & Infrastructure, a division of AMEC Americas Limited J. Chris Innes Peter Nimmrichter, M.Eng. P.Eng. Information Management Group Lead Senior Water Resources Engineer Ottawa, Ontario Mississauga, Ontario
Page 1 and 2: Atlantic Climate Adaptation Solutio
Page 3: GOVERNMENT OF NEWFOUNDLAND AND LABR
Page 7 and 8: EXECUTIVE SUMMARY The Government of
Page 9 and 10: Assessing the Need for New or Updat
Page 11 and 12: SUMMARY The Government of Newfoundl
Page 13 and 14: Land Use Change A pre-cursor effort
Page 15 and 16: fresh water from the Arctic south a
Page 17 and 18: watershed, which appears to already
Page 19 and 20: RECOMMENDATION SUMMARY Infrastructu
Page 21 and 22: 7. It is recommended that WRMD deve
Page 23 and 24: TABLE OF CONTENTS PAGE EXECUTIVE SU
Page 25 and 26: 7.3 References for Assess Need for
Page 27 and 28: LIST OF TABLES Table 2-1. Flood Eve
Page 29 and 30: LIST OF FIGURES Figure 2-1. Water R
Page 31 and 32: 1. OVERVIEW In the 1980‟s, under
Page 33 and 34: Floodway Floodway Fringe Climate Ch
Page 35 and 36: 2. Task B - Updated Flood Events In
Page 37 and 38: Management Framework for Canada def
Page 39 and 40: The „Types of Events‟ field is
Page 41 and 42: Field Damage Estimate by Community
Page 43 and 44: Arrangements 10 (DFAA) damage estim
Page 45 and 46: Storm # General Location Year Seaso
Page 47 and 48: 2.3.2 Weather Events - Annual Occur
Page 49 and 50: Figure 2-6. Storm Occurrence by Yea
Page 51 and 52: Figure 2-8. Storm Occurrence by Mon
Page 53 and 54: 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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Worst Case Scenarios This section
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5. A hurricane making landfall on t
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Standards Association 21 recommends
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WRMD has defined a preference for h
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The hydrographic network was used t
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4.1.8 Flood History Identification
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Watershed Slope The slope attribute
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such as number of flood events at a
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Deer Lake Placentia Codroy Steady B
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TA1112733 page 109
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5.2 Methods The methodology used fo
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Reported Event Damages Storm# Locat
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Given the reported damages resultin
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Figure 5-3. Storm tracks for select
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natural constrictions. The number a
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5.5.2 Community Exposure to Physica
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Community Number of Events 2011 Pop
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Community Access Notes Confinement
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Brook and Deer Lake are both locate
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Warning Systems 1. It is recommende
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source of flood vulnerabilities com
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Figure 6-2. Newfoundland Digital El
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communities ( Gillams, Hughes Brook
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Sub-region Precipitation Climate Ch
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Analysis of the socio-economic data
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East-2 Coastal communities line nea
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6.2.2 Potential Strategies Table 6-
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6.3 Mitigation Recommendations Base
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Table 6-5 presents the range of ave
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West-3, West-4, and Central-3 These
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Mitigation Strategy Cost to Impleme
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Sub-region Watershed Characteristic
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TA1112733 page 155
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Music and Caya, 2007 Richter and Ba
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http://www.arcgis.com/home/item.htm
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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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TA1112733 page 173
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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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