WMOD00277

• Contract/Permit #: 14-06-D-6467
• Title: An Operational Adaptation Program for the Colorado River Basin
• Prepared By: Lewis O. Grant, Chappell, Crow, Mielke Jr., Rasmussen, Shobe, Stockwell, Wykstra
• Date: 10/1/1969
• State: CO
• Country: United States
• Weather Modification - Doc Type: Report

TABLE OF CONTENTS

List of Tables
List of Figures

I. Introduction

II. Objectives.

III. Organization of the Design Study.

IV, '!"rccedures.....

,\. Design Efforts

H.

Specific Comments on Some ;::>f the Vital Aspects of the Design

1. Program Design . . . . . . . . . . . .
a. Delineation of operational areas . .
b. Economic and social considerations
c. Operational control and evaluation
2. Operational Definition . . . . . . . .
a. Establish criteria for operations.
b. Climatology . . . . . . . . . . .
3. Operational Design. . . . . . . . . .
a. Observation network for data input.
b. Determination of operational seeding equipment to be employed
c. Seeding agents. . . . . . . . .
d. Targeting of seeding operations
e. Communications and telemetry.
f. Transportation. . . . . . . . .
g. Cost Control . . . . . . . . . .
h. Description of techn:lques for using present technology to meet
requirements of phYl3ical models of the cloud systems . . . . .
4. Operational Control . . . . . . . . . . . . . . . . . . . . . . . .
a. Administrative and technical channels for controlling operations
b. Control central and field bases. . . . . . . . . . . " . . . . .
c. General procedures (computer model) for controlling operations

V.

Status Report on Various Phases of the Operational Adaptation Program for the
Colorado River Basin . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.

Physical Basis for Weather :VIodification Operations . . . . . . . . . . . . . .

1. Introduction................
2. A Model to Delineate Modification Potential
a. Rate of ice growth by vapor diffusion. .
b. Supply rate of condensate. . . . . .' . .
c. Relation of ice crystals to cold cloud precipitation efficiency.
d. Temperature activation spectrum for ice nuclei . . . . . . .
e. Ice crystal imbalance in precipitating cold orographic clouds.
f. Relationship of mean daily snowfall to cloud top temperature
g. The accretion process
h. The ballistics problem. . . . . . . . . . . . . . . . . . .

B.

Experimental Basis for a Pilot Project and Meteorological Criteria for
Weather Modification Operations . . . . . . . . . . . . . . . . . . . .

1. Experimental Design
a. Climax experiment. . .
b. Wolf Creek experim'~nt .
2. Statistical Evaluation Procedures
3. Basic Data ...........
a. Climax I data sampl,~ (251 cases)
b. Climax II data sample (127 cases).
c. Wolf Creek I data sample (362 cases).

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