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

LIST OF TABLES
Table 2-1. Flood Events Inventory - Field Descriptions .............................................................................. 11
Table 2-2. Comparison of Damage Estimates ............................................................................................ 15
Table 2-3. Storm/Flood Occurrence by Month and Season ....................................................................... 20
Table 2-4. Event Type Occurrence ............................................................................................................. 23
Table 2-5. Flood Occurrence by Community .............................................................................................. 24
Table 2-6. Event Type Groupings ............................................................................................................... 27
Table 3-1. Communities for which Flood Mapping is Presently Available .................................................. 31
Table 3-2. Communities for which Flood Mapping required digitizing from PDF or JPG drawings ............ 32
Table 3-3. Communities for which Flood Mapping data was provided by WRMD in Shapefile
format. .................................................................................................................................... 33
Table 3-4 Communities for which flood mapping data was captured from Autocad files ........................... 33
Table 3-5. Land Cover Classes .................................................................................................................. 40
Table 3-6. Original (left) and aggregated (right) classes used to identify forest loss between 2000
and the dates of image classification. .................................................................................... 41
Table 3-7. Land cover metrics (area in square kilometres and percent of watershed area) for 39
watersheds and 32 communities. .......................................................................................... 45
Table 3-8. Percentage change in precipitation (mm/day) relative to 1961-1990 average
precipitation. ........................................................................................................................... 54
Table 3-9. Change in temperature ( o C) relative to 1961-1990 average temperatures. ............................. 55
Table 3-10. Updated IDF values for Gander based on data to 2011 .......................................................... 58
Table 3-11. Updated IDF values for Goose Bay based on data to 2009 except for 24-hr
precipitation which is to 2011. ................................................................................................ 58
Table 3-12. Saffir Simpson Hurricane Scale Based on Storm Intensity ..................................................... 61
Table 3-13. Frequency of Tropical Systems Affecting Each Region of Newfoundland and
Labrador, Based on Intensity (1954-2011) ............................................................................ 61
Table 3-14. Potential sea-level trends by 2099 and effect on flood-risk zone delineation. ........................ 73
Table 4-1. Age of Flood Study Weighting ................................................................................................... 95
Table 4-2. Climate Change Prioritization Factors ....................................................................................... 98
Table 4-3. Population Weighting ............................................................................................................... 100
Table 4-4. Drainage Attribute to Hydrologic Soil Class Relationship ........................................................ 102
Table 4-5. Dominant Hydrologic Soil Group Weighting ............................................................................ 102
Table 4-6. Watershed Slope Weighting .................................................................................................... 103
Table 4-7. Prioritization Parameters Hierarchy ......................................................................................... 106
Table 4-8. Prioritization of Communities for Updating of Existing Flood Plain Mapping .......................... 107
Table 4-9. Prioritization of Communities for New Flood Plain Mapping. The first twenty
communities only in this table, see Appendix A for a complete list ..................................... 108
Table 5-1. Communities registering 5 or more flood events ..................................................................... 111
Table 5-2. Disaster Financial Assistance Arrangements values (as provided to AMEC by WRMD) ....... 112
Table 5-3. Communities with damage estimates from the Flood Events Inventory.................................. 113
Table 5-4. Tropical Storms and hurricanes recorded in the Flood Events Inventory. Point data
was not available for the unnamed October, 1955 event. ................................................... 116
Table 5-5. Identified key communities. Mooring Cove is included with Marystown, and Noel‟s
Pond is included with Stephenville. ..................................................................................... 120
Table 5-6. Physical hazard ranking results. .............................................................................................. 121
Table 5-7. Physical Hazard Weighting ...................................................................................................... 122
Table 5-8. Rankings of vulnerability to direct impacts to flooding. Census data for the Codroy
Valley, Cold Brook, and Goulds could not be obtained. ...................................................... 123
Table 5-9. Vulnerability to Direct Impact to Flooding Weighting ............................................................... 124
Table 5-10. Ranking for vulnerability to indirect effects of flooding .......................................................... 125
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