ist ja nicht so das die Bekämpfung von Waldbränden durch Feuer oder
Sprengungen völlig unbekannt ist.
Selbst in Filmen wurde das Popularisiert da es Symbolisch doch der
"Hammer" ist ;)
"Kootenay National Parks of Canada
Park Management
2003 Wildfires
Fighting Fire with Fire
View document in PDF format (Adobe PDF document, 148 KB)
Picture
Hand igniting a burnout ahead of the main fire.
© Parks Canada/Gord Irwin/August 2003
Generations of North Americans have been raised with Smokey the Bear
extolling us to prevent forest fires. Seeing firefighters lighting
fires near a wildfire, instead of spraying water on it, may create
confusion. "Why are they making the fire bigger? is a common
question.
The truth is that deliberately lit fire is a very important weapon in
the firefighter's arsenal. Fire fighting techniques can be grouped
into two broad categories direct and indirect control.
Direct Control
Direct control suppresses the fire through putting water or retardant
adjacent to or directly onto the fire from helicopters, airtankers or
hoses. Direct control works best on smaller fires or slow burning
fires and is also used when people and structures are at immediate
risk.
Direct control is less effective and extremely dangerous on large,
active fires. Extreme fire behaviour is usually accompanied by high
winds, blowing embers, high temperatures, unpredictable air currents,
and massive amounts of smoke. This may create situations that are too
risky for ground and aerial attack.
Indirect Control
Indirect control establishes a fireguard in the path of the fire and
takes advantage of favourable terrain and natural firebreaks. The
fireguard is created by physically removing fuels or through coating
fuel with retardants to reduce its flammability. With the fireguard
established, the unburned fuels between the guard and the wildfire
are burned out, when conditions allow, using hand drip torches or by
aerial ignition with drip torches or ping-pong balls filled with
self-igniting chemicals.
Burning out allows fire managers to choose the time and place that
the fuels get burned rather than remaining at the whim of fire
behaviour and weather. Indirect control is used when there is space
and time to establish an extensive fireguard. It is sometimes the
only way to protect structures in the fire's path.
Fires may also be lit to create air currents in order to draw the
main fire, smoke and lofted embers toward or away from some areas.
The two km wide Vermilion Pass Fireguard used a burnout area to
prevent the Tokumm Creek Fire escaping the Vermilion Valley of
Kootenay National Park.
Prescribed Fire
Parks Canada also uses prescribed fire to restore the health of
ecosystems. These planned fires also remove build-ups of forest fuels
and provide protection against future wildfires. The Fairholme
Prescribed Burn in Banff National Park will provide a firebreak for
many years near the communities of Canmore and Banff."
Quelle: http://www.pc.gc.ca/pn-np/bc/kootenay/plan/plan9_e.asp
Zumindest in meiner Jugend hatten wir immer eine Schachtel Dynamit zu
Hause stehen, zwar nicht gegen Brände aber um einen Baumstumpf zu
Entfernen gibt es wohl nichts einfacheres - heute hat man ja wie im
Artikel geschrieben da kein Vertrauen mehr in die Bürgern. Genau so
wie Kinder heute vor Gericht kommen wenn sie selber Raketen oder
Schwarzpulver bzw härteres Herstellen genau so werden die Erwachsenen
gegängelt - Schade diese "Sprengschläuche" wären echt genial, aber
eben wir züchten uns da unsere Ängste und Bürokratie selber....
aber ist ja nicht so das man es nicht schon seit Jahrtausenden kennen
würde, was effizient und "natürlich" ist...
Sprengungen völlig unbekannt ist.
Selbst in Filmen wurde das Popularisiert da es Symbolisch doch der
"Hammer" ist ;)
"Kootenay National Parks of Canada
Park Management
2003 Wildfires
Fighting Fire with Fire
View document in PDF format (Adobe PDF document, 148 KB)
Picture
Hand igniting a burnout ahead of the main fire.
© Parks Canada/Gord Irwin/August 2003
Generations of North Americans have been raised with Smokey the Bear
extolling us to prevent forest fires. Seeing firefighters lighting
fires near a wildfire, instead of spraying water on it, may create
confusion. "Why are they making the fire bigger? is a common
question.
The truth is that deliberately lit fire is a very important weapon in
the firefighter's arsenal. Fire fighting techniques can be grouped
into two broad categories direct and indirect control.
Direct Control
Direct control suppresses the fire through putting water or retardant
adjacent to or directly onto the fire from helicopters, airtankers or
hoses. Direct control works best on smaller fires or slow burning
fires and is also used when people and structures are at immediate
risk.
Direct control is less effective and extremely dangerous on large,
active fires. Extreme fire behaviour is usually accompanied by high
winds, blowing embers, high temperatures, unpredictable air currents,
and massive amounts of smoke. This may create situations that are too
risky for ground and aerial attack.
Indirect Control
Indirect control establishes a fireguard in the path of the fire and
takes advantage of favourable terrain and natural firebreaks. The
fireguard is created by physically removing fuels or through coating
fuel with retardants to reduce its flammability. With the fireguard
established, the unburned fuels between the guard and the wildfire
are burned out, when conditions allow, using hand drip torches or by
aerial ignition with drip torches or ping-pong balls filled with
self-igniting chemicals.
Burning out allows fire managers to choose the time and place that
the fuels get burned rather than remaining at the whim of fire
behaviour and weather. Indirect control is used when there is space
and time to establish an extensive fireguard. It is sometimes the
only way to protect structures in the fire's path.
Fires may also be lit to create air currents in order to draw the
main fire, smoke and lofted embers toward or away from some areas.
The two km wide Vermilion Pass Fireguard used a burnout area to
prevent the Tokumm Creek Fire escaping the Vermilion Valley of
Kootenay National Park.
Prescribed Fire
Parks Canada also uses prescribed fire to restore the health of
ecosystems. These planned fires also remove build-ups of forest fuels
and provide protection against future wildfires. The Fairholme
Prescribed Burn in Banff National Park will provide a firebreak for
many years near the communities of Canmore and Banff."
Quelle: http://www.pc.gc.ca/pn-np/bc/kootenay/plan/plan9_e.asp
Zumindest in meiner Jugend hatten wir immer eine Schachtel Dynamit zu
Hause stehen, zwar nicht gegen Brände aber um einen Baumstumpf zu
Entfernen gibt es wohl nichts einfacheres - heute hat man ja wie im
Artikel geschrieben da kein Vertrauen mehr in die Bürgern. Genau so
wie Kinder heute vor Gericht kommen wenn sie selber Raketen oder
Schwarzpulver bzw härteres Herstellen genau so werden die Erwachsenen
gegängelt - Schade diese "Sprengschläuche" wären echt genial, aber
eben wir züchten uns da unsere Ängste und Bürokratie selber....
aber ist ja nicht so das man es nicht schon seit Jahrtausenden kennen
würde, was effizient und "natürlich" ist...