GIS to HMS:
An Investigation of the Midwest Flood of 1993

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Table of Contents

GIS to HMS: An Investigation of the Midwest Flood of 1993

Presentation Outline

Project Overview and Goals

Study Area: Upper Cedar River Basin

Stream and Watershed Delineation: ArcView Watershed Delineation Tool

Delineated Stream and Watershed Coverages

Streams and Watersheds

Calculation of Parameters

Ferdi’s HECPREPRO: HEC HMS Preprocessing Program for ArcView

HECPREPRO Output

Precipitation Data

Precipitation Distribution: Thiessen Method

Determining Weighting Coefficients

HMS Precipitation File

Hydrologic Modeling System (HMS)

HMS Subbasin and Reach Model

HMS Output Hydrographs

Predicted vs. Observed Hydrographs

Conclusions

Work to be Done...