Odour is diluted by dispersion as it is transported in the atmosphere. The further it travels, the
\nmore it is diluted. Therefore, adequate setback distances are a key in preventing odour
\ncomplaints. The important factors that influence odour dispersion are wind, atmospheric stability,
\nand topography. Odour is carried by wind from the source to the receptor. Therefore, the
\nprevailing wind direction should be considered when choosing sites for livestock facilities. The
\nwind direction should be checked before agitating and spreading manure to avoid odour being
\ncarried to neighboring residences by the wind. The atmospheric stability is commonly described by the Pasquill stability classes: A – strongly
\nunstable; B – moderately unstable, C – slightly unstable; E – slightly stable, F – moderately stable,
\nand D – neutral (overcast). Odour is diluted quickly when the atmosphere is unstable. Therefore, it
\nis a good practice to spread manure when the atmosphere is unstable so that odour is diluted to an
\nacceptable level before it reaches the receptor (residences).<\/p>\n
If possible, livestock facilities should be built on relatively flat topography for good dispersion. It
\nshould be avoided to build facilities near hills to prevent the effect of aerodynamic downwash.
\nWindbreaks (walls, trees and shrubs) may be used to trap odour and dust, and to create more air
\nturbulences for stronger dispersion. The dispersion theories (eg., Gaussian dispersion model) indicate that increasing the odour
\nrelease height reduces odour intensity at the ground level. Exhaust stacks (chimneys) may be used
\nto raise the release points of the ventilation air, thus to reduce odour complaints originated from
\nanimal buildings.<\/p>\n","protected":false},"excerpt":{"rendered":"
Odour is diluted by dispersion as it is transported in the atmosphere. The further it travels, the more it is diluted. Therefore, adequate setback distances are a key in preventing odour complaints. The important factors that influence odour dispersion are wind, atmospheric stability, and topography. Odour is carried by wind from the source to the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[8882,465,640,13816,493,9290,2817,12761,23694,696,12670,286,313,314,20007,20792,5381,169,10859,496,198,200,16262,17743,27282,2120,15428,35,1131,20410,20911,4874,91,274,69],"class_list":["post-1528","post","type-post","status-publish","format-standard","hentry","category-environment","tag-al","tag-ammonium","tag-animal","tag-ass","tag-biofilter","tag-carr","tag-cla","tag-confined-swine","tag-dir","tag-dispersion","tag-down","tag-dust","tag-emission","tag-emissions","tag-gh","tag-influence","tag-light","tag-manure","tag-nat","tag-nitrate","tag-odor","tag-odour","tag-pl","tag-prod","tag-production","tag-release","tag-setback","tag-swine","tag-swine-production","tag-swine-production-facilities","tag-t","tag-tan","tag-transport","tag-ventilation","tag-water"],"_links":{"self":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/1528","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/comments?post=1528"}],"version-history":[{"count":0,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/posts\/1528\/revisions"}],"wp:attachment":[{"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/media?parent=1528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/categories?post=1528"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/prairieswine.com\/rsc\/wp-json\/wp\/v2\/tags?post=1528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}