LWI Region 3 Modeling Overview

5.1.1 Data Collected Modeling the direct monetary damage to a structure and its contents relies on three main data inputs , Table 4-3.

Table 5-1 Consequence Modeling comparison – Bayou Cocodrie – 1PCT_24hr_OpenGate.

INPUT

SOURCE

Hydraulic modeling output

Maximum flood depth at the location of the structure Structure Inventory with detailed characteristics (e.g., occupancy type, foundation type, foundation height, etc.)

Structure Inventory v1.3 (From LWI)

FEMA and USACE for each occupancy type (default options)

Depth-damage function

The maximum flood depth damage is the final product of the hydrologic and hydraulic modeling section of LWI initiative, it is covered in detail in the H&H Report. Figure 5-2 presents Structure Inventory features within the study area covered by Region 3, which includes Bayou Cocodrie, Bayou Macon, Tensas, and Boeuf, all within the State of Louisiana. The depth-damage function is a curve that defines the percentage of damage a structure and its contents may sustain as flood depth increases. This function is defined based on the structure’s occupancy type and is derived from expert evaluations of past flood events and associated economic losses recorded by FEMA. An example of a depth-damage function is presented in Figure 5-3.

Figure 5-2: Consequence Modeling study area.

North Atlantic Coast Comprehensive Study: Resilient Adaptation to Increasing Risk

Figure 5-3: Depth-damage function.

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Consequence Modeling