WMOD00034

• Contract/Permit #: #94-6
• Applicant: North American Weather
• Project Name: Willow Creek Basin
• Date: 11/1/1994
• Weather Modification - Doc Type: Report

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Table of Contents

Section

Pae:e

1.0 INTRODUCTION.................................. 1-1

2.0 TIlEORY OF CLOUD SEEDING FOR
PRECIPITATION AUGMENTATION. . . . . . . . . . . . . . . . . . . . . . 2-1

3.0 NAWC ORGANIZATION AND FAClllTIES . . . . . . . . . . . . . . . . . 3-1

3.1 Field Equipment and Locations . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2 Office Facilities ............................... 3-4

3.3 Personnel................................... 3-5

4.0 OPERATIONS.................................... 4-1

4.1 Operational Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2 Operational Guidelines .......................... . 4-2
4.3 Operational Seeding Summary ...................... 4-3

4.3.1 Weather Summary ......................... 4-5

5.0 ASSESSMENT OF SEEDING EFFECTS. . . . . . . . . . . . . . . . . . . . 5-1

5.1 Background.................................. 5-1
5.2 Evaluation of Snowpack in the Target Area .............. 5-3

5.2.1 Selection of Target and Control Areas ............. 5-4
5.2.2 Snowpack Results. . . . . . . . . . . . . . . . . . . . . . . . . . 5-7

5.3 Evaluation of Precipitation in the Target Area . . . . . . . . . . .. 5-11

5.3.1 Target Area Gauge Sites .................... 5-11
5.3.2 Control Area Gauge Sites . . . . . . . . . . . . . . . . . . .. 5-12
5.3.3 Regression Equation Development. . . . . . . . . . . . . .. 5-12
5.3.4 Evaluation Results (Precipitation) ............... 5-14

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