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Določanje emisijskih vrednosti prašnih delcev in njihova difuzija v okolici večjih prometnicKoren, Urška ; Eichinger, WilliamV prispevku so predstavljene meritve prašnih delcev s sistemom LIDAR in razvoj metode za določanje emisijskih vrednosti. Meritve so, bile opravljene v mestu Iowa City, Iowa, ZDA, decembra 2001 in ... zagotavljajo bazo podatkov za določanje emisijskih vrednosti in spremljanje širjenja prašnih delcev, katerih izvor je gost cestni promet. Meritve so potekale v časovnem obdobju od 11 h do 17 h, tako da so zajele višek onesnaženosti v prometnih konicah. Ker so direktne meritve emisij večkrat nepopolne, se za njihovo določanje uporabljajo modeli, ki pa izražajo le povprečno vrednost in ne realnih vrednosti emisij. Zato smo razvili matematični model za posredno določanje realnih emisijskih vrednosti. Ta je osnovan na inverziji linijskega modela izvora polutantov po metodi najmanjših kvadratov. Za iskanje minimuma sta uporabljeni Newton-Raphsonova in Stohastična aproksimacijska metoda. Simulacija opisanega modela je pokazala na večjo uporabnost Stohastične metodein potrebo po podatkih najmanj tridesetih točkovnih meritev imisijskih vrednosti za uspešno določitev realnih emisijskih vrednosti.Source: Zbornik referatov s posvetovanja. D. 1-2 (Str. 152-157)Type of material - conference contribution ; adult, seriousPublish date - 2002Language - slovenianCOBISS.SI-ID - 221691
Author
Koren, Urška |
Eichinger, William
Topics
prašni delci |
cestni promet |
onesnaževanje |
LIDAR
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Koren, Urška | 19068 |
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