Table of contents
Overview
Clearfell logging and water runoff
Clearfell logging reduces water runoff - overview
Age of forest determines water runoff
Impact of logging on water runoff
Community Concern
Otway water supplies more than 300,000 people
in South West Victoria
If logging stopped in Otways catchments, water yield
would increase by 7-28%
History of community concern
Failure of RFA process to protect water supplies
from logging
Otway Hydrology Reference Group
Geelong
domestic water supply catchment
See
where logging is proposed in the Geelong water supply catchment
Logging
history: West Barwon Catchment (Geelong's Water Catchment)
How
much is a 10% water increase for the West Barwon reservoir if logging
stopped?
Proposed
100 year logging scenario for the West Barwon Catchment
Warrnambool
domestic water supply catchment
See
where logging is proposed in the Warrnambool water supply catchment
(Gellibrand River)
Logging history: Gellibrand Catchment
Gellibrand river summer flow vulnerability
Impacts of logging the Gellibrand river
Case Study: Importance of Otway water to the Dairy
Industry
Land use in the Gellibrand catchment
Clearfell
logging and wildfire in Otway catchments
Logging Practices Increase the risk of bushfires
in water supply catchments
Fire Occurrence in Otway Catchments
Serious forest fires in the Otways are started
by careless logging practices
Economics of Water
Vs Hardwood
Economic Value of Water vs. Timber
Economic Value of Water vs. Timber, West Barwon
Catchment
Value of Water if logging ceased
Water more valuable than timber and woodchips
Invalid arguments used to comparing timber
and water
Logging roads and Landslides
Impact of logging roads on landslides and
water quality
Landslides: Sedimentation of river systems
Landslides on logging roads are an ongoing
problem for water quality in the Otways
Landslides and High Rainfall
Code of Forest Practices: No prescriptions to prevent
landslides
Stewardship of
Otways water supply catchments
Proposed Otway hydrology research
Otway hydrology research cancelled
Logging within 200 metres of West Barwon
Dam
Conclusions
Recommendations
|
