WMOD00568

• Project Name: Snowater
• Title: Snow Water Augmentation for the Eastern Slopes of the Rockies - Stage I: Technology Adaptation
• Date: 6/1/1986
• Weather Modification - Doc Type: Report

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Studies of
evaluation
expanded.

extra
studies

area effects would also be
started in Year Two would

started. Physical
be continued and

2.5.3.1 Trial Opperational Seeding

It is essential that all components required to recognize cloud
seeding opportunities and to effectively carry out cloud seeding be
fully checked out during Year Three. Ground-based and airborne seeding
delivery mechanisms would be used in suitable orographic cloud
systems.

Data from the Seeding Opportunity Recognition System together with
that from aircraft instrumentation and scanning radar would be used to
document the evolution of cloud structures and precipitation in seeded
and unseeded cases.

2.5.3.2 Snow Measurements

Measurement of snow from natural and treated systems would be made
using a special network. This network would be operated in rugged
snow-covered terrain. Where possible, pre-existing snow pillows, snow
guages and snow courses (such as those operated by Alberta
Environment) would be used to supplement this network. It should be
capable of detecting a 10 to 15 percent increase in snow
precipitation. Special ground and air transportation systems would be
necessary for this activity.

High resolution meteorological and snow crystal measurements would be
made at a mountain observatory during experimental periods~ Sequential
sampling of snow for chemical analysis of silver, tracers and stable
isotopic composition would also be carried out as part of the
assessment program.

2.5.3.3 Extra-Area Effects

Downwind snowfall would be examined for evidence of seeding effects.
This activity would continue in SNOWATER II.

2.5.4 YEAR FOUR - PROJECT ANALYSIS AND ASSESSMENT

The fourth year of the project is foreseen to primarily involve
analyses of data. Field operations would not be planned except for
the continued radar and microwave radiometer monitoring of clouds.
Efforts would be focused on the refinement and maintenance of field
systems. An assessment of the technology and operational procedures
would be completed and results and recommendations published in the
project Final Report.

2-13

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