Matrix - Sustainable Retention Index Value (S.R.I.V.)©
Use of this document and referencing
The Sustainable Retention Index Value (SRIV)© is free to use, but only in its entirety and must be cited as follows:
IACA, 2010, Sustainable Retention Index Value (SRIV)©, Version 4, A visual method of objectively rating the viability of urban trees for development sites and management, based on general tree and landscape assessment criteria, Institute of Australian Consulting Arboriculturists, Australia, www.iaca.org.au.
The matrix is to be used with the value classes defined in the Glossary for Age / Vigour / Condition.
An index value is given to each category where ten (10) is the highest value.
 |
 |
|||||
Good Vigour & Good Condition (GVG) |
Good Vigour & Fair Condition (GVF) |
Good Vigour & Poor Condition (GVP) |
Low Vigour & Good Condition (LVG) |
Low Vigour & Fair Condition (LVF) |
Low Vigour & Poor Condition (LVP) |
|
Able to be retained if sufficient space available above and below ground for future growth. No remedial work or improvement to growing environment required. May be subject to high vigour. Retention potential - Medium - Long Term. |
Able to be retained if sufficient space available above and below ground for future growth. Remedial work may be required or improvement to growing environment may assist. Retention potential - Medium Term. Potential for longer with remediation or favourable environmental conditions. |
Able to be retained if sufficient space available above and below ground for future growth. Remedial work unlikely to assist condition, improvement to growing environment may assist. Retention potential - Short Term. Potential for longer with remediation or favourable environmental conditions. |
May be able to be retained if sufficient space available above and below ground for future growth. No remedial work required, but improvement to growing environment may assist vigour. Retention potential - Short Term. Potential for longer with remediation or favourable environmental conditions. |
May be able to be retained if sufficient space available above and below ground for future growth. Remedial work or improvement to growing environment may assist condition and vigour. Retention potential - Short Term. Potential for longer with remediation or favourable environmental conditions. |
Unlikely to be able to be retained if sufficient space available above and below ground for future growth. Remedial work or improvement to growing environment unlikely to assist condition or vigour. Retention potential - Likely to be removed immediately or retained for Short Term. Potential for longer with remediation or favourable environmental conditions. |
|
 |
YGVG - 9 Retention potential - Long Term. Likely to provide minimal contribution to local amenity if height <5 m. High potential for future growth and adaptability. Retain, move or replace. |
YGVF - 8 Retention potential - Short - Medium Term. Potential for longer with improved growing conditions. Likely to provide minimal contribution to local amenity if height <5 m. Medium-high potential for future growth and adaptability. Retain, move or replace. |
YGVP - 5 Retention potential - Short Term. Potential for longer with improved growing conditions. Likely to provide minimal contribution to local amenity if height <5 m. Low-medium potential for future growth and adaptability. Retain, move or replace. |
YLVG - 4 Retention potential - Short Term. Potential for longer with improved growing conditions. Likely to provide minimal contribution to local amenity if height <5 m. Medium potential for future growth and adaptability. Retain, move or replace. |
YLVF - 3 Retention potential - Short Term. Potential for longer with improved growing conditions. Likely to provide minimal contribution to local amenity if height <5m. Low-medium potential for future growth and adaptability. Retain, move or replace. |
YLVP - 1 Retention potential - Likely to be removed immediately or retained for Short Term. Likely to provide minimal contribution to local amenity if height <5 m. Low potential for future growth and adaptability. |
 |
MGVG - 10 Retention potential -Medium - Long Term. |
MGVF - 9 Retention potential - Medium Term. Potential for longer with improved growing conditions. |
MGVP - 6 Retention potential - Short Term. Potential for longer with improved growing conditions. |
MLVG - 5 Retention potential - Short Term. Potential for longer with improved growing conditions. |
MLVF - 4 Retention potential - Short Term. Potential for longer with improved growing conditions. |
MLVP - 2 Retention potential - Likely to be removed immediately or retained for Short Term. |
 |
OGVG - 6 Retention potential - Medium - Long Term. |
OGVF - 5 Retention potential - Medium Term. |
OGVP - 4 Retention potential - Short Term. |
OLVG - 3 Retention potential - Short Term. Potential for longer with improved growing conditions. |
OLVF - 2 Retention potential - Short Term. |
OLVP - 0 Retention potential - Likely to be removed immediately or retained for Short Term. |
Powered by Endless Networks