Dr. Ali Khan Flood Events Inventory.pdf - Atlantic Climate Adaptation ...

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Dr. Ali Khan Flood Events Inventory.pdf - Atlantic Climate Adaptation ...

Flood Events Inventory -Newfoundland and LabradorWater ResourcesManagementDivisionAmir Ali Khan, Ph.D., P. EngMichael Colbert, P. EngWater Resources Management DivisionDepartment of Environment and ConservationGovernment of Newfoundland and LabradorNovember 27, 2012Department ofEnvironment &Conservation


Flood Events Inventory1998-2008Water ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Data Fields and Definitions• A “flood event” representsthe affects of a storm eventon a single community ordamage centre and is equalto a single record in theinventory.Water ResourcesManagementDivision• A “storm event” is the eventthat initiates a flood event. Asingle storm event is, inmany cases, associated withmultiple flood events.Environment CanadaPhotos provided by Carl StrongDepartment ofEnvironment &ConservationEx. A storm event with multiple flood events


Data Fields and DefinitionsWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Flood Events Inventory• “A PreliminaryStudy of Floodingin Newfoundlandand Labrador(1998-2008)”.1998-2008Water ResourcesManagementDivision• 179 records/floodevents and 70storm events.Department ofEnvironment &Conservation


Water ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Atlantic Climate AdaptationSolutions InitiativeWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Flood Events Inventory1950-2011• 2011 WRMD received NRCANfunding for new Flood Riskand Vulnerability AnalysisProject• Update of WRMD’s FloodEvents Inventory:• 1950 to 2011• 650 flood events and 269storm events• an addition of 471 floodevents and 199 storm eventsWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Data Sources• The existing Flood EventsInventory (1998-2008)• Newfoundland and Labrador,Department of Environment andConservation Flood Studieswebsite• A collection of previouscompleted flooding studies• Centre for NewfoundlandStudies, Memorial University ofNewfoundland• Newfoundland and Labrador,Department of NaturalResources Flooding Eventswebsite• Newfoundland and LabradorHeritage (Coastal Flooding)website• Media reports• Public Safety Canada –Canadian Disaster Database• Environment CanadaWater ResourcesManagementDivision• Geological Survey of Canada,Flood Disasters in CanadawebsiteDepartment ofEnvironment &Conservation


Types of FloodsWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Scanned DocumentsWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Storm AnalysisWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Storms in FEIWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation• 269 storms in updated FEI• Average of 4 storms per year


Storms by Region• E=148• W=91• C=29• L=1Water ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Storms by Season and RegionWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation• Most storms are in the winter• Central has less storms


Storms by MonthWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation• Most storms are in January and February• Fewest storms are in July


Storms by Month and RegionWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation• Most storms are in Eastern Region duringJanuary and February


Flood AnalysisWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Flood Occurrence by CommunityFrom the 269storms therewere650 floods.Averagingmore than 10floods peryear.Water ResourcesManagementDivisionDepartment ofEnvironment &Conservation• St. Johns has had the most flooding at 73events or 11% of the total flood events


Types of FloodsWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Floods by Community and SeasonWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation• Most communities experience winterflooding


Floods by Community andSeasonWater ResourcesManagementDivisionSeptember is associated, presently, with the greatestnumber of flood events in theinventory representing about 26% of the records.Department ofEnvironment &Conservation


Floods by Community and CauseWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation• For most communities, rainfall is, by far,the leading cause of flooding


Economic AnalysisWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Cost of Floods (1955-2010)Water ResourcesManagementDivisionDepartment ofEnvironment &ConservationDamages were identified in the inventory in 31 of the 56 yearsover the period 1955 to 2010 totaling about $252 million(normalized to 2011 dollars).


Cost of Floods (1955-2010)• Of the 650 flood eventsin the Flood EventsInventory, fifty-three(53) flood events havedamage estimates.• The average annualcost is estimated to beaboutWater ResourcesManagementDivision• $8.1 million over theperiod (i.e. $252M/31)or• $4.5 million (i.e.$252M/56)Department ofEnvironment &Conservation


Disaster Financial AssistanceArrangements (DFAA)Damage Estimates• The DFAA, administered by Public SafetyCanada, is used by the Government of Canadato provide financial assistance to provincialand territorial governments in the event of alarge scale natural disaster.Water ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Cost of Floods (2000-2010)Water ResourcesManagementDivisionDepartment ofEnvironment &Conservation11 flood events from 8 years have damage estimates totalingabout $180 million (normalized to 2011 dollars)


Cost of Floods (2000-2010)• All DFAA damageestimates are greaterthan $1 million.Water ResourcesManagementDivision• The average annual costis estimated to be• $22.5 million over theperiod 2000-2010represented by datarecords with damageinformation (i.e.,$180M/8y) or• $16.3 million(i.e.$180M/11y) if it isassumed that years withno recorded flooddamages are taken intoaccount.Department ofEnvironment &Conservation


Cost of Floods by YearThe average annualcost is estimated tobe $22.5 million overthe period 2000-2010Water ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Cost of Floods by SeasonWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation• Fall floods, followed by winter, are the mostcostly


Path ForwardWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


QA/QCWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Move into a DatabaseWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


CategoriesWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Forecast RegionsWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Tertiary WatershedsWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


GISWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


ScopeWater ResourcesManagementDivisionDepartment ofEnvironment &Conservation


Thank You!Amir Ali Khan, Ph.D., P.EngPhone: (709) 729-2295Email: akhan@gov.nl.caWater ResourcesManagementDivisionDepartment ofEnvironment &ConservationMichael Colbert, P.EngPhone: (709) 729-1229Email: michaelcolbert@gov.nl.ca

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