WMOD00408

• Contract/Permit #: 14-06-D-6963
• Project Name: Colorado River Basin Pilot Project
• Title: Colorado River Basin Pilot Project - Final Comprehensive Operations Report - 1970-75 Season
• Date: 12/23/1975
• Weather Modification - Doc Type: Report

CHAPTER 1

CHAPTI1lR 2.

CHAP'rlQR S

CONTENTS

INTRODUCTION. . . . . . . . . . . . . . . .
1. 1 Purpose and Objectives. . . . . . . . .
1. 2 Background for Project Location and
Des ign. . . . . . . .
1.3 Project Area . . . .
1.4 Expected Results. . . . . . . .

OPERATIONAL PLAN . .
2.1 Randomization Plan.
2.2 Experimental Day. .
2. 2. 1 Definition of an Experimental Day .
2. 2. 2 Criteria for an Experimental Day .
2. 3 Ope rational Seeding Plan. . . . . .
2.4 Generator Selection Procedure. . . . . . . .
2. 4. 1 Mean Flow for Targeting. . . . . .
2.4. 2 Offset Values for Low Level Flow .
2.4. 3 Depth of the Generator Network . .
2.5 Suspension Criteria. . . . . . . . . . . . .

OPPORTUNITY RECOGNITION FORECASTING. .
3.1 Forecast Procedures for Experimental
Day Recognition. . . . . . . . . . . . . .
3. 2 Objective Prediction Techniques. . . . .
3. 2. 1 Discrimination of Precipitation
and Non-precipitation Events. .
3.2. 2 Quantitative Assessment of
Precipitation . . . . . . . . . .
3. 2. 3 Precipitation in Relation to 700
mb Wind and Terrain Slope. . .
3. 2.4 Avalanche Appraisal . . . . . .
3. 2.4. 1 Initial Data Sources .
3. 2.4. 2 Avalanche Frequency
3. 2. 4. 3 Attendant Upper Air
Features and
Precipitation. . . . .
3. 2.4.4 Data Stratifying
Routine s . . . . . . .
3. 2.4. 5 Resulting Conditional
Probabilities of Ava-
lanche Occurrence. .
3. 2.4. 6 Suspension Criteria.
3.3 Opportunity Recognition Forecast
Verification. . . . . . . . . . .
3.3.1 Forecast Verification. . . . .

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