نتایج جستجو برای: air quality index aqi

تعداد نتایج: 1286419  

عبداله نژاد, علی, محمدی, امیر, میری, محمد, نعمتی, سپیده, نیکونهاد, علی,

Introduction and Purpose: Mashhad, one of the most populous cities in Iran, is facing air pollution due to motor vehicle emissions and industries. Therefore, this study aimed to evaluate the variations in Air Quality Index (AQI) during the spring of 2012-2014 and its spatial zoning with Arc GIS. Methods: In this descriptive study, the AQI values were calculated by the associ...

Journal: :محیط شناسی 0
غلامحسین کیانی استادیار گروه اقتصاد، دانشکدۀ علوم اداری و اقتصاد، دانشگاه اصفهان فاطمه یاری دانشجوی کارشناسی ارشد علوم اقتصادی، دانشکدۀ علوم اداری و اقتصاد، دانشگاه اصفهان هادی امیری استادیار گروه اقتصاد، دانشکدۀ علوم اداری و اقتصاد، دانشگاه اصفهان

introduction air pollution is one of the critical challenges in metropolitans around the world. according to world health organization (who), three millions people die from air pollution annually. in some studies mortality costs by air pollution was estimated. social cost of air pollution was estimated 28990 billions rials in tehran city. the mortality cost by air pollution was estimated about ...

2015
Zheng Zhang Huadong Ma Huiyuan Fu Xinpeng Wang

Along with rapid urbanization and industrialization processes, many developing countries are suffering from air pollution. Air quality varies non-linearly, the effective range of an air quality monitoring station is limited. While there are seldom air quality monitoring stations in cities, it is difficult to know the exact air quality of everywhere. How to obtain the air quality fast and conven...

Journal: Pollution 2019

The city of Tehran undergoes an increasing growth in population as well as industrial activities, both of which increase the concentration of air pollutants. The current research tries to turn a limited and focused system of air contamination measurement and control to an unlimited and extensive one that examines the concentration of each of the contaminants in any area of Tehran. Accordingly, ...

Journal: :IOP conference series 2022

Abstract Air pollution is increasingly becoming a main environmental matter in the world. It can impact public health, weather, and climate. Riyadh's air poses significant health risks. The study aimed to analyze current future quality by using AQI. Main six pollutants are considered, nitrogen dioxide (NO 2 ), sulfur (SO particulate (PM), ground level ozone (O 3 carbon (CO monoxide (CO). Eleven...

2016
Xiaoping Yang Zhongxia Zhang Zhong-qiu Zhang Liren Sun Cui Xu Li Yu

The rapid industrial development has led to the intermittent outbreak of pm2.5 or haze in developing countries, which has brought about great environmental issues, especially in big cities such as Beijing and New Delhi. We investigated the factors and mechanisms of haze change and present a long-term prediction model of Beijing haze episodes using time series analysis. We construct a dynamic st...

The city of Tehran undergoes an increasing growth in population as well as industrial activities, both of which increase the concentration of air pollutants. The current research tries to turn a limited and focused system of air contamination measurement and control to an unlimited and extensive one that examines the concentration of each of the contaminants in any area of Tehran. Accordingly, ...

2015
Chuanglin Fang Haimeng Liu Dongqi Sun Pallav Purohit

Urban air pollution is one of the most visible environmental problems to have accompanied China’s rapid urbanization. Based on emission inventory data from 2014, gathered from 289 cities, we used Global and Local Moran’s I to measure the spatial autorrelation of Air Quality Index (AQI) values at the city level, and employed Ordinary Least Squares (OLS), Spatial Lag Model (SAR), and Geographical...

2015
Azadeh Tahmasebi Mohammad Mehdi Amin Parinaz Poursafa Bijan Iraj Hamidreza Sadeghiyan Roya Kelishadi Babak Sadeghian

OBJECTIVES Air pollution is a hazardous environmental problem with several adverse health effects including its impact on the development of chronic diseases as diabetes mellitus. This study aimed to investigate the association of geographical distribution of air quality index (AQI) and type 2 diabetes mellitus in an air-polluted city by using geographic information system (GIS). METHODS This...

Behrouz Alizadeh, Fariba Khalili, Parviz Nowrouz, Reza Nemati, Saeed Motesaddi,

Background: Air pollution and concerns about health impacts have been raised in metropolitan cities like Tehran. Trend and prediction of air pollutants can show the effectiveness of strategies for the management and control of air pollution. Artificial neural network (ANN) technique is widely used as a reliable method for modeling of air pollutants in urban areas. Therefore, the aim of current ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید