MAPPER Flood Damage Routine

1
MAPPER Flood Damage Routine
Setting Inflow and Output Parameters in GDS
DETENTION BASIN SIMULATION
2
Damage assessment

• The goal is to estimate the damage (cost) caused
  by a flooding in an developed area.
• Calculation is based on the FLO-2D results
  (maximum depths) and a cost assigned to each
  building or area for a number of water depths

3
Damage assessment

• Required data
• FLO-2D input (.DAT) and output (.OUT) files.
• A polygon shape file (ESRI) containing an index
  for each polygon. Each polygon represents a
  building, house or vulnerable area (houses.shp).
• A table file (.TBL) containing information on
  the damage (cost ) as function of flood depth for
  each building type in the polygon shape file
  (DamageCode_08.tbl).

4
Damage assessment

• The damage table file has this format

Depths(ftm)
DamageCode, 1,2,3,4,5,6,7,8,9,10 1,5000,10000,1500
0,20000,25900,30500,35000,40000,45000,50000 2,3000
,10000,15500,20500,25000,30300,35000,40000,45000,5
0000 3,4000,10500,19000,20300,25000,28000,35000,40
000,45000,50000 4,5500,12000,13000,20000,25600,300
00,35000,40000,45000,50000 5,5000,10000,15000,2000
0,25000,30000,35000,40000,45000,50000
Cost for each building code and each depth
5
Damage assessment

• Procedure is as follows
• Read FLO-2D results
• Display the FLO-2D predicted maximum flood depth
• Import the building polygon shape file
  (DamageCode_08.tbl) using the Import Shape file
  Command in the File menu.
• Select Estimate Flood Damage Command in the Tools
  menu.
• Import the damage table file .TBL
• Click on Compute Damage button to calculate
  damage estimate for each building
• Edit damage layer to display values

6
Whats next

• Review of Flood Mapping