02-12-2010, 20:48
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חבר מתאריך: 21.01.06
הודעות: 22,587
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אוקי מצאתי את מה שחיפשתי, אם מישהו רוצה לקרוא על "הפסקת-אש" (או "קו אש")
מוזכרים שם גם קוי הפסקת אש שקיימים ממילא, כמו נהרות או כבישים, וגם נסיונות מפורשים ומחושבים ליצור קווים כאלה במטרה למנוע משריפות להתפשט.
Firebreak
A firebreak (also called a fireroad, fire line or fuel break) is a gap in vegetation or other combustible material that acts as a barrier to slow or stop the progress of a bushfire or wildfire. A firebreak may occur naturally where there is a lack of vegetation or "fuel", such as a river, lake or canyon. Firebreaks may also be man-made, and many of these also serve as roads, such as a logging road, jeep trail, secondary road, or a highway.:
Effectiveness
Depending on the environmental conditions, and the relative effectiveness of a given firebreak, firebreaks often have to be backed up with other firefighting efforts. Even then, it is still sometimes possible for fire to spread across a seemingly impenetrable divide. During the worst part of the fire season in southern California, strong Santa Ana winds will blow carpets of burning embers across eight-lane freeways. During the 1988 fires in Yellowstone National Park, hot embers managed to cross the Lewis Canyon, a natural canyon up to a mile wide and 600 feet (180 m) deep.
http://en.wikipedia.org/wiki/Firebreak
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יהיה משהו, כי יש משהו
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