Submitted to the Water Resources Planning Fellowship Steering Committee, Colorado State University.

A critical assessment of methodologies for estimating urban flood damages-prevented benefits

LAND USE INTERPRETATION IN FLOOD DAMAGE ESTIMATION by Sharon M Metzler This thesis examines the role of geographic land use interpretation in flood damage estimation Sample flood data were drawn from the 1998 flood event along San Francisquito Creek in northern Santa Clara County, California Spatial flood data for the event were collected from the Santa Clara Valley Water District (the District); depthdamage factors and the flood damage equations were both collected from US Army Corps of Engineers’ (the Corps) publications; and spatial parcel data were collected from the Santa Clara County Tax Assessor’s office (the Assessor) This study computes flood damages per parcel using the Corps’ recommended equations Within that computation process the land use classifications from three different agencies and comprising 9-100 land use categories were interpreted to fulfill the calculations The Tax Assessor’s land uses were generalized into construction land uses in order to identify replacement costs Construction land use categories were then generalized into the Corps land uses in order to apply depth-damage factors per structure The flood-affected parcels were then grouped to include the District’s designated land uses The flood risk was then mapped by land use and described in dollars as a means of choosing an appropriate flood protection measure The computation was performed per parcel and variations in the economic information conveyed by each agency’s land uses were reviewed

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Land Use Interpretation in Flood Damage Estimation

: The Flood Damage Analysis (FDA) Package enables a variety of flood damage computations to be performed using linked hydrologic engineering and flood damage computer programs. A data storage system links the programs and allows the almost automatic transfer of data from one program to another. This package has existed for several years on mainframe computers. Recently, it has been adapted to MS-DOS microcomputers.

https://www.hec.usace.army.mil/publications/TechnicalPapers/TP-125.pdf

An Integrated Software Package for Flood Damage Analysis

: The Flood Damage Analysis Package integrates hydrologic and hydraulic information with economic calculations to evaluate existing conditions as well as project conditions using the frequency method to determine expected annual damage. This document details the MS-DOS personal computer system requirements and the software installation procedure. It also documents changes made to the individual computer programs subsequent to the last release of their associated user's manual. Flood damage analysis, Expected annual damage, Structure inventory, Depth-damage functions, Grid cell database, HEC Data storage system, MENUFDA, Test data files

/pdf/flood-damage-analysis-package-on-the-microcomputer-4mmk9xc22d.pdf

Flood Damage Analysis Package on the Microcomputer. Installation and User's Guide

: The Corps of Engineers Hydrologic Engineering Center has developed techniques that perform the spatial data analysis approach and individual structure approach and work is near completion on an integrated analysis package. The capability therefore exists to perform damage appraisals in a manner that encourages a general geographic and land use approach (thus greatly facilitating the study of nonstructural measures) while preserving the ability to analyze individual, unique structures should the need arise. This paper discusses the basic concepts of a spatial data management approach to damage appraisals and highlight(s) its integrated use with more traditional individual structure approaches. Selected example results are presented. (Author)

Robert Pat Webb

Papers

Flood Damage Assessments Using Spatial Data Management Techniques.