18129 version 2
28-Jun-16
1 of 3
AVALANCHE
Demonstrate knowledge of snow
formation, snowpack structure and
snow metamorphism
level:
3
credit:
3
planned review date:
June 2009
sub-field:
Snowsport
purpose:
People credited with this unit standard are able to
demonstrate knowledge of snow formation, snowpack
structure, and snow metamorphism.
entry information:
Open.
accreditation option:
Evaluation of documentation and visit by NZQA and industry.
moderation option:
A centrally established and directed national moderation
system has been set up by Sport, Fitness and Recreation
Industry Training Organisation.
special notes:
1
It is recommended that people undertaking assessment
against this unit standard have already attained or are
working towards Unit 20161, Analyse weather
information and predict weather conditions for the
outdoors.
2
Industry guidelines for recording snow and weather
information are contained in the New Zealand
Guidelines and Recording Standards for Weather,
Snowpack and Avalanche Observations, (Wellington:
New Zealand Mountain Safety Council, 2003).
3
There are minimum assessor requirements for
assessment against this unit standard. The details of
these requirements are available on the Sfrito website
http://www.sfrito.org.nz/.
 New Zealand Qualifications Authority 2016
18129 version 2
28-Jun-16
2 of 3
AVALANCHE
Demonstrate knowledge of snow
formation, snowpack structure and
snow metamorphism
Elements and Performance Criteria
element 1
Demonstrate knowledge of snow formation and snowpack structure.
performance criteria
1.1
The process of snow formation is described.
Range:
1.2
The key features of snowpack structure are described.
Range:
1.3
temperature, humidity, freezing nuclei.
base, layers, interface between layers, surface, strength of layers,
temperature gradient, grains.
The mechanical properties of snow are described.
Range:
stress, strength, strain, elasticity, plastic deformation, creep, glide.
element 2
Demonstrate knowledge of snow metamorphism.
performance criteria
2.1
Conditions that promote rounding are described.
Range:
2.2
grain size, type, density, temperature gradient, temperature
closeness to zero.
Conditions that promote faceting are described.
Range:
grain size, type, density, temperature gradient, temperature
closeness to zero.
 New Zealand Qualifications Authority 2016
18129 version 2
28-Jun-16
3 of 3
AVALANCHE
Demonstrate knowledge of snow
formation, snowpack structure and
snow metamorphism
2.3
Conditions that promote wet grain metamorphism are described.
Range:
2.4
air temperature, solar radiation, precipitation, grain size, snowpack
depth and density, snowpack temperature.
Surface changes and the development of seasonal snowpack are described.
Range:
elevation, aspect to wind and radiation, storm cycles, temperature.
Comments on this unit standard
Please contact the Sport, Fitness and Recreation Industry Training Organisation
info@sfrito.org.nz if you wish to suggest changes to the content of this unit standard.
Please Note
Providers must be accredited by the Qualifications Authority or a delegated interinstitutional body before they can register credits from assessment against unit standards
or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by the Qualifications Authority before
they can register credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for providers wishing to
develop education and training programmes, such as minimum qualifications for tutors and
assessors, and special resource requirements.
This unit standard is covered by AMAP 0050 which can be accessed at
http://www.nzqa.govt.nz/site/framework/search.html.
 New Zealand Qualifications Authority 2016