Flood hazard modeling to derive parameters for Insurance...
Transcript of Flood hazard modeling to derive parameters for Insurance...
Karthikeyan Matheswaran
Postdoctoral Researcher, IWMI Central Asia
Flood hazard modeling to derive parameters for Insurance index
Index development cycle
Site prioritization Rainfall-Runoff model Flood Hazard Model
Index Development
Insurance Product
Insurance index
₹
Economic loss Flood Parameters
= Correlate
To create index
How Much? Long?
Flood Characteristics
Parameters:
Deriving flooding Characteristics / Parameters
• Depth & Duration (DD) – Measured in specific river sections
• In floodplain & land surface: DD – Function of topography
• Measurements – Lumped
• Flood characteristics – Distributed
• Need a system / method to predict DD
Hydrodynamic Model – mathematical representation of flow mechanism in rivers and
flood plain
Mike Flood
Cross sections
Discharge / Water level Upstream
River networks
Longitudinal profile
Discharge / Water level Calibration/Validation
Flood Hazard Model
Digital Elevation Model (DEM)
Depth & Duration over
floodplain/landsurface
Water level @ different river sections
1D
Hyd
rau
lic m
mo
del
2D
Ove
rlan
d f
low
mo
de
l
Input Output Depth / Duration land surface
Parameters Zonation
River Bagmathi River network DEM & Cross section locations
Water Level in Bagmathi for June and August
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41
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1993 1995 1997 1999 2001 2003 2005
Wat
er le
vel (
AM
SL)
Year
Water Level in Bagmathi - June
Water level - Hayaghat Water level - Benibad
Danger level - Hayaghat Danger level - Benibad
Average crop coverage area (Ha) in proposed blocks (Kharif) Crop Aurai Katra Gaighat Paddy 11000 11000 11000 Maize 1400 1400 1400 Pulses 630 630 630
Flood Hazard map of Muzzafarpur District
Source: BSDMA, http://bsdma.org/Atlas.aspx
Thank you