FLOOD10114

• County: Saguache
• Stream Name: Saguache Creek
• Basin: Rio Grande
• Title: Radar Rainfall Reconstruction of Saguache Creek Flash Flood
• Date: 7/25/1999
• Prepared For: CWCB
• Prepared By: HDR Engineering, Inc.
• Floodplain - Doc Type: Flood Documentation Report

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TABLE OF CONTENTS

Introduction ................ .......................................... ........ .................. Page 2

Synoptic Situation ........................................ ................................... Page 3

Data Sources, Analysis Techniques, and "Gridding" Procedures .Page 6

3.1 Data Sources ..........................................................................., Page 6
3.2 Use of Radar to Calculate Rainfall ............................................., Page 6
3,3 Saguache Creek Basin Rainfall Estimation Methodology............... Page 8
3.4 Analysis of Radar Reflectivity and Rainfall ..................................Page 10

Cloud to Ground Lightning Data ...............................................Page 13

CG Data and Topography ..........................................................Page 13

4.2 CG Data and Radar Reflectivity .................................................Page 16
4.3 CG Data and Grid Averaged Rainfall Rates .................................Page 17

Relationship of Rainfall to Topography ........................................Page 17
Comparison of Runoff Derived and Radar Storm Rainfall............Page 20

Conclusions ................................. .................................................. Page 20

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