Amelanchier
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Everything posted by Amelanchier
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Dangerous trees in woodlands
Amelanchier replied to benedmonds's topic in Forestry and Woodland management
QTRA is just a way of systematically justifying your decision. Not the decision itself - your professional judgements go into the calculations. I think you are perfectly justified in assigning them a low risk. If the occupancy of the target zone is low in good weather, just think how low it is in bad weather when the tree is most likely to fail! -
Poetic! Don't forget her sister Blackthorn. Death from a thousand septic incisions...
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Ahhh Ficus aurea. Plays the long game!
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Out of 10? I'm cruising at 8...
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Nice. Perhaps I'll have to force them to in Gladatorial combat... Shrek - I think your spikey little hawthorn would get shaded out early in the second round!
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What tree would be best in a fight? I mean, if they could fight, which species would be best and why? I started off thinking Holm Oak (Q. ilex) because its big, heavy and vigourous. Calluses well and can take a beating. But then I though about Crack Willow (S. fragilis); see the Holm oak would batter that to bits in a fight but then those bits would just root and grow into more willows... Tough call, any other suggestions????
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You'll understand that we'll have to delete this thread for copyright reasons. (Now that everyone has what they want!)
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Exactamundo. Its bloody depressing is what it is. People take personal frictions from their own experiences and apply it to one and all... This thread started quite reasonably about the quals / experience that a TO should have and that's where we should have gone with it. Oh well - time will consign another sabotaged discussion to the murky depths of lake arbtalk.
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Maybe contractors should have to do 20 years as a tree officer before being allowed to complain.
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I like that - the "would you park your car under it" test.
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Well the spread is looking good - though i'd want about 50 votes to be sure. BUMP!
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From the safety and comfort of my swivelly chair within my office high up in my Ivory tower.. I say Ganoderma spp. As you say - looks too flat for a Fomes. Waaaayy too flat. Though from memory I think Lonsdale says something about a flatter form on Fagus... More of an issue if it is Fomes I suppose, different white rot to Ganoderma with a more brittle fracture IIRC, one of those decisions where the ID is more critical than it seems. A slice would be nice
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The blue/damaged area does look large but to play devils advocate for a minute... I notice that the sensors appear to be positioned at equal intervals, were the distances between them measured? Also, the sensor positions depict a perfect circle - was the stem more or less equally circular in cross section? I only ask because subtle differences like that can throw off the self calibration of the PICUS and give different readings. Having said that, I doubt there would be much difference - worth knowing in borderline cases though. We'll see when the rings come down!
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I thought that was how you normally climbed?
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We're not running a novice section this year. Truth is it was rarely novices that actually won it, just people who hadn't competed before. There is probably going to be a prize or two for best newcomer / most improved etc... You'll be climbing against someone as close to your skill level as we can find and you'll need your NPTC Climbing Cert (whatever number that is these days!)
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I'm rubbish and I judge it! This is a fun comp, we don't take it too seriously - so we hope the competitirs don't either!
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I disagree. What you describe implies that all trees with public access must be inspected. That's not what the HSE say at all (see the attached file!!) or indeed the courts (see the recent judgement on Atkins vs Scott). Anyway - my point is not about action. My point is that we can't even begin to think about action without knowing the likelihood of the event. How would you reconcile your approach with summer branch drop in a public area? HSE_SIM_Risk_From_Trees.pdf
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Following on from the last effort - take a look at these images and give your opinions on the likelihood of failure of the limb as a result of the defect. The rules are the same:- In a population of 100 oak trees like this one, how many would suffer total limb failure as a result of this defect within an average 12 months period. As last time - ignore targets. I want to single out the likelihood of failure. Its number of trees out of 100, not percent. In this instance the tree is moderately exposed and in good vigour. And yes, I do realise that technically, the limb has already failed! Cheers
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Would you take your own bet? Sounds like an easy way to lose £200 to me.
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I suspect that the tree was planted within a raised bank and the wound resulted from stem damage and root loss when the bank was removed. I've used smiley and friedrich once or twice - mainly to confirm gut reaction though.
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Indeed, but before thinking about the consequences its important to be clear about the likelihood of failure. Otherwise we end up specifying works based on worse case scenarios without thinking about the actual probability of things happening.
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For the purposes of this experiment it was failure within 12 months. which is supposed to match up with a fairly average reinspection interval.
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There is a City & Guilds one day course in Signing, Lighting and Guarding which covers Chapter 8 Streetworks - I did mine in Watton so not too far to travel for you and it's more or less unfailable!!!
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Thats kind of where I'm going with this - trying to work out some repeatable, systematic way in which someone could post a picture and "ask the audience" about the likelihood of failure!
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I'm guessing it used to be on its own and now its got too many friends!
