A weather phenomenon called cold air flow or cold air drainage
makes Eugene-Springfield and other valley communities vulnerable to smoke from forest fires in the Cascade foothills and Cascade Range.
The land had to be higher than the surrounding land for air drainage
(frost and winter cold).
Tenders are invited for Salt Air Drainage
Request of offers from eligible bidders for the widening & deepening of the open air drainage
network at Zawyet Ghazal Zone along Mahmoudiya Canal under funding from the World Bank.
Pick a site with as much sun as possible, good air drainage
and decent soil.
Increased gas density under pressure creates the potential for increased resistance to air drainage
from the intrapleural space and through the PDU.
These occur in a hollow or bottom of a slope leading to a wall or fence where cold air becomes trapped preventing air drainage
, so plants freeze.
What makes the Finger Lakes region so ideal for vineyards are the lakes and the sloping hillsides, which minimize damage from severe weather by increasing air drainage
, or movement of air.
Topography consists of south-sloping, open and dry plains with sandy, well-drained soils, creating ideal sun exposure and good air drainage
to protect vineyards during winter months.
Willamette Valley Vineyards winery director Christine Collier said site topography means the property has just 20 plantable acres, however it also enjoys good air drainage
Sites with adequate air drainage
can reduce freeze damage and winter injury and north or northeast facing slopes are preferable, he said.
Late-spring frosts can still be a concern for vines not planted on sites with relative elevation that encourages cold air drainage