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Module 5 - VicForests

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Appendix E<br />

Coupe selection<br />

E<br />

E.1 Target coupe selection for <strong>Module</strong> 5<br />

The coupe selection process was based on a Master Coupe List that was provided by DSE. This list<br />

was originally derived from <strong>VicForests</strong>’ Coupe Information System (CIS) and was intended to include<br />

all coupes in which harvesting had occurred during the 2008-09 financial year (except firewood<br />

coupes). On receipt of the Master Coupe List, URS reviewed the data for consistency and, in<br />

conjunction with DSE, made minor changes where it was identified that scores had been assigned<br />

incorrectly or where data was missing from individual fields.<br />

For all coupes in the Master Coupe List, scores were calculated by DSE for the environmental risk<br />

parameters of: slope (S), soil erosion hazard (SE), silvicultural system (SS), special land protection<br />

requirements (PR) and Compliance Theme (CT). The scoring system for each parameter is described<br />

below.<br />

Slope (S)<br />

Steep slopes are more susceptible to erosion which could potentially affect water quality and road<br />

networks. Slope risk values are assigned as outlined in Table E-1.<br />

Table E-1:<br />

Slope Risk Value by Class<br />

Soil erosion hazard (SE)<br />

Slope Class Slope Risk Value<br />

27 4<br />

Soils with a higher erosion hazard are more likely to erode affecting potential for regeneration, water<br />

quality, stream flow and the road network. Soil erosion hazard is the product of soil erodibility and soil<br />

permeability which are determined according to the Soil Erosion Hazard and Soil Permeability<br />

Assessment and Classification Forest Management Branch Forests Service, Department of Natural<br />

Resources and Environment, March 1999. Using this methodology, the soil erosion hazard is<br />

categorised as Low, Medium or High with corresponding Soil Risk Values of one, two and three<br />

respectively.<br />

Silvicultural System (SS)<br />

Clear felling and seed tree silvicultural systems are more likely to affect the environment and<br />

biodiversity and are assigned a silvicultural system value of two. Coupes where non-clear felling<br />

silvicultural systems have been employed are assigned a SS value of one.<br />

Special land protection requirements (PR)<br />

General Management Zones (GMZ) are considered to have the lowest sensitivity to environmental<br />

damage and are assigned a protection risk (PR) value of one. Special Protection Zones (SPZ) and<br />

Special Management Zones (SMZ) have greater sensitivity to environmental damage and are<br />

assigned a PR value of two. Coupes that fall within water supply catchments are also assigned a PR<br />

value of two.<br />

42807504/01/01

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