نتایج جستجو برای: winddirection

تعداد نتایج: 5  

2008
D. M. Hamby

The models used in the NRC approach to assess chronic atmospheric releases of radioactivity generate deterministic dose estimates by using standard assumptions about exposure conditions and environmental transport mechanisms. This approach has been used at the Savannah River Site since 1983. Total dose to off-site maximum individuals at the SRS from atmospheric releases has been on the order of...

Journal: :international journal of environmental research 2014
p.f. hudak

the objective of this study was to analyze spatial patterns of ground-level ozone concentrationin the dallas-fort worth, texas metropolitan area. average daily maximum eight-hour ozone concentration,number of days with concentrations exceeding 75 ppb, average outside air temperature, and resultant winddirection at 20 monitoring stations were compiled for january-december, 2013. recent estimates...

Journal: Desert 2013
A. Nazari Samani A. Shahbazi S. Dadfar

Sand and dust storms are natural events that occur widely around the world, mostly in dry and bare lands. Over thepast decade a large part of Iran has been affected by this phenomenon, and Tehran has not been excluded from thisevent. Therefore, having knowledge of spatiotemporal frequency variations can aid us in future management andstorm trajectory assessment. In this study the synoptic anemo...

Journal: :desert 2013
a. a. nazari samani s. dadfar a. shahbazi

sand and dust storms are natural events that occur widely around the world, mostly in dry and bare lands. over thepast decade a large part of iran has been affected by this phenomenon, and tehran has not been excluded from thisevent. therefore, having knowledge of spatiotemporal frequency variations can aid us in future management andstorm trajectory assessment. in this study the synoptic anemo...

Journal: :محیط شناسی 0
پونه سعیدی دانشجوی دکتری منابع آب، دانشکدة تحصیلات تکمیلی محیط زیست دانشگاه تهران ناصر مهردادی استاد گروه مهندسی محیط زیست، دانشکدة تحصیلات تکمیلی محیط زیست، دانشگاه تهران مجتبی اردستانی استادیار گروه مهندسی محیط زیست، دانشکدة تحصیلات تکمیلی محیط زیست، دانشگاه تهران اکبر باغوند دانشیار گروه مهندسی محیط زیست، دانشکدة تحصیلات تکمیلی محیط زیست، دانشگاه تهران

introductiondue to shortage of fresh water resources, the quality of impounded water behind the dams becomemore important than how it was previously as a source of fresh water resource. thermal regime anddissolved oxygen concentration are factors that affect the quality of water reservoirs.many lakes show vertical stratification of their water masses, at least for some extended timeperiods. the...

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