Last week FOBIF secretary Bernard Slattery wrote to DSE Bendigo to express our concerns about Tarilta Gorge, in particular the massive soil loss resulting from the Department’s management burn [see our post].We’ve received the following answers to our questions from Paul Bates,Forest Manager, Bendigo Forest Management Area. For convenience of readers, we’ve put our questions in italics before each answer. Readers can assess whether our questions have been answered:
1. Last year in our submission on fire zones we drew attention to the steep slopes in this area, and the need to be extra careful in any burning operation. Given that heavy rain was predicted in the week after the proposed burn, why was there evidently no effort to protect the steeper slopes? [Sludge in the creek is up to a metre deep in parts. In walking along the creek bed I went up to my waist at one point in soil and ash]
DSE: ‘DSE monitors fuel and weather conditions when completing prescribed burns. The weather records over the days when this burn was ignited show that the conditions were within the limits for burning in this type of forest. DSE also monitors weather forecasts for the days following ignition of a prescribed burn including potential rainfall. Predicting accurate rainfall amounts and intensity can be difficult, especially predictions several days ahead. All weather factors are considered and a decision was made in this particular case that ignition of the burn area would proceed.’
2. We’re still at a loss as to DSE’s inability to protect large trees from these burns. Red box on the slopes and even larger trees on the valley floor have been destroyed. We’d like to know what kind of supervision takes place in this area.
DSE: The Murray Goldfields District puts a lot of effort into minimising damage to large old trees. DSE and PV field staff spent over a week raking around many large old trees in this burn area. With a burn area size of about 550ha, every attempt is made to locate and rake all large old trees however it can not be guaranteed that all such trees will be located. Protection of these trees is an important part of preparing areas for prescribed burning.
3. The Ecological Management Zone’s purpose is ‘promoting biodiversity and ecological renewal. Planned burning will be used to manage native species and ecological communities which require fire to regenerate.’ Can you tell us which species you had in mind in this operation? Is there baseline data to enable an assessment of the success of the operation?
DSE: ‘This burn is in the ecological management zone, zone 3. The EVC’s are present in the burn area, Heathy dry forest and Valley grassy forest. Apart from several small bush fires, the burn area has no known fire history. The ecological objective of the burn was to introduce fire into the long unburnt forest.’
4. We were under the impression that in this zone the intention is to do a mosaic burn covering about one third of the area. It seems to us that much more was actually burnt. Can you tell us what your estimate is of the burn coverage?
DSE: ‘I am not able to provide you with an estimate of burn coverage of the burn however DSE plans to undertake fire intensity and burn coverage mapping on this burn.’
FOBIF has sent the following follow up questions, which we can’t see answered in DSE’s response:
1. In the light of the weather forecast, why was there evidently no effort to prevent soil loss from the steep slopes of the gorge?
2. We repeat the second question: What kind of supervision takes place during the burn to prevent ecological damage, like the destruction of possibly the biggest tree in the valley?
3. We repeat the third question: What species did managers have in mind as potentially benefiting from this operation?
We’ll publish any response as soon as we get it.