CKA Forums
Login 
canadian forums
bottom
 
 
Canadian Forums

Author Topic Options
Offline
CKA Uber
CKA Uber
 Vancouver Canucks
User avatar
Profile
Posts: 28994
PostPosted: Sat Dec 07, 2019 7:26 am
 


Title: Australia bushfires north of Sydney 'too big to put out'
Category: Environmental
Posted By: DrCaleb
Date: 2019-12-06 07:04:57
Canadian


Offline
CKA Moderator
CKA Moderator
User avatar
Profile
Posts: 34688
PostPosted: Sat Dec 07, 2019 7:26 am
 


Fixed the link. :(


Offline
CKA Uber
CKA Uber
User avatar
Profile
Posts: 16177
PostPosted: Sat Dec 07, 2019 8:06 am
 


But pay no mind, because the Cricket team is doing well.


Offline
CKA Moderator
CKA Moderator
User avatar
Profile
Posts: 34688
PostPosted: Mon Dec 09, 2019 6:55 am
 


I'm sure Watts will come up with some spin that convinces them these fires aren't happening, and didn't happen last year or the year before . .


Offline
Forum Elite
Forum Elite
User avatar
Profile
Posts: 1393
PostPosted: Mon Dec 09, 2019 7:01 am
 


Quote:
The Bureau of Meteorology (BOM) said that "some fires were too big to put out" while the NSW RFS said late Friday the blazes would only be extinguished "when we get good rain".
Too bad they are not blessed with magical geo-engineering technology the way we are up here.


Offline
Forum Elite
Forum Elite
Profile
Posts: 1578
PostPosted: Thu Dec 12, 2019 3:29 pm
 


This sounds like an Extreme Wildfire Event (EWE) in the lingo we are all going to be hearing more of:

Quote:
In the current technological conditions, the accepted limit of capacity to control a fire is 10,000 kWm−1. Beyond 10,000 kWm−1, it is well accepted that even heavy water bombers are ineffective, and fire control is not possible with current day technology and technical resources. Long flames also make fires increasingly difficult to control and represent a threat for firefighters who must operate approaching to fire front, but respecting their “safety zone”. With an increasing FLI, the quantity of water to be eventually used as an extinguishing agent to contain flames grows. When FLI is close to the 10,000 kWm−1 threshold, the water amount needed to contain flames is evaluated in 25 to 30 liters every 30 seconds per meter of front...

...EWE is defined as:
a pyro-convective phenomenon overwhelming capacity of control (fireline intensity currently assumed ≥ 10,000 kWm−1; rate of spread >50 m/min), exhibiting spotting distance > 1 km, and erratic and unpredictable fire behavior and spread. It represents a heightened threat to crews, population, assets, and natural values, and likely causes relevant negative socio-economic and environmental impacts.

https://res.mdpi.com/d_attachment/fire/ ... 009-v2.pdf


The crucial measure seems to be fireline intensity (FLI). Once that is over 10000 kW/m, then the fire cannot be controlled. Alberta’s Chisholm fire was an EWE with an FLI of 233,000 kw/m.

https://edmontonjournal.com/news/insigh ... to-explode


Last edited by Sunnyways on Thu Dec 12, 2019 11:11 pm, edited 2 times in total.

Offline
CKA Moderator
CKA Moderator
 Vancouver Canucks


GROUP_AVATAR
User avatar
Profile
Posts: 64527
PostPosted: Thu Dec 12, 2019 4:26 pm
 


CharlesAnthony wrote:
Quote:
The Bureau of Meteorology (BOM) said that "some fires were too big to put out" while the NSW RFS said late Friday the blazes would only be extinguished "when we get good rain".
Too bad they are not blessed with magical geo-engineering technology the way we are up here.


Yup. We have Greta Thunberg and the Aussies don't! :lol:


Post new topic  Reply to topic  [ 7 posts ] 



Who is online

Users browsing this forum: No registered users and 11 guests




 
     
All logos and trademarks in this site are property of their respective owner.
The comments are property of their posters, all the rest © Canadaka.net. Powered by © phpBB.