scholarly journals Temporal Variation of Particulate Matter Concentrations within the Urban Area of Athens, Greece

2016 ◽  
Author(s):  
Hina Najam ◽  
Konstantinos Moustris ◽  
Panagiotis Nastos
Keyword(s):  
Particulate Matter ◽  
Temporal Variation ◽  
Urban Area ◽  
Cold Period ◽  
City Center ◽  
Heating Systems ◽  
Suburban Areas ◽  
Significant Seasonal Variation ◽  
High Concentrations ◽  
The City

The main objective of this work is to investigate the temporal variation of PM10 concentrations within the urban area of Athens during the years 2001-2015. For this purpose, the time series of the particulate matter with aerodynamic diameter less than 10μm (PM10) is recorded for a 15-year period (2001-2015) in two different monitoring stations located in the urban area of Athens. The results show a totally different behavior of PM10 concentrations between the Athens city center and the suburban areas. It seems that in the city center the main sources of PM10 are traffic and heating systems especially during the cold period of the year. Furthermore, in the city center a significant seasonal variation was found with high concentrations during the cold period of the year and lower concentrations during the warm period of the year. Moreover, it was found that during the weekends, there is a decrease in PM10 concentrations probably due to the fact that majority of people do not use their vehicles. Finally, for both locations a significant temporal decreasing trend of the mean annual PM10 concentrations was found which indicates that during the last years, there have been improvements towards a better air quality.

scholarly journals Study of Air Quality at One of the World’s Most Densely Populated City Dhaka and its Suburban Areas

2019 ◽  
Vol 43 (1) ◽  
pp. 59-66
Author(s):  
Mohammad Lokman Hossain ◽  
Subrata Chandra Roy ◽  
Mithun Chandra Bepari ◽  
Bilkis Ara Begum
Keyword(s):  
Particulate Matter ◽  
Urban Area ◽  
Power Plants ◽  
Winter Season ◽  
Atmospheric Particulate Matter ◽  
Suburban Areas ◽  
Air Sampler ◽  
Pm10 And Pm2.5 ◽  
Academy Of Sciences ◽  
The City

Air borne particulate matter PM10 and PM2.5 were collected by using Mini Vol portable Air Sampler from the world most densely populated city Dhaka and its suburban areas over a period of January through December in 2016. This study revealed a comparison of atmospheric particulate matter (PM) of a highly polluted urban area to its two neighboring areas that accommodate heavy oil based power plants. In all three sites the quantity of PM decreases in summer reaching its lowest level in the month of July, however, it increases significantly in winter season. Despite the presence of the fuel based power plants the average concentrations of PM10 and PM2.5 at the city Dhaka surpasses its two neighbors Manikganj and Nawabganj. Interestingly, PM2.5/PM10 ratio is higher at the suburban areas than urban area. The study shows that for all the sites PM2.5 is approximately twice than that of WHO and USEPA. However, the values of PM2.5 is almost similar for Nawabganj and Manikganj but much higher for the Dhaka city especially during dry season . The Mass concentration of Black Carbon (BC) was also determined from the PM samples from Manikganj and Nawabganj. Journal of Bangladesh Academy of Sciences, Vol. 43, No. 1, 59-66, 2019

SPATIAL STRUCTURE TRANSFORMATION OF THE ULAN-UDE CITY WESTERN AND SOUTHERN SUBURBS

2021 ◽  
Vol 27 (5) ◽  
pp. 99-106
Author(s):  
А. Badmaev ◽  
◽  
В. Sharaldaev ◽  
Keyword(s):  
Spatial Structure ◽  
Road Transport ◽  
Residential Areas ◽  
City Center ◽  
Huge Number ◽  
Non Profit ◽  
Suburban Areas ◽  
Historical Factors ◽  
The Village ◽  
The City

The article analyzes the processes of suburbanization and transformation of the spatial structure of the city of Ulan-Ude. Modern trends in the growth of Western and historical factors of development, due to socio-economic and historical factors of development. In the 1990s-2000s, because of the decline in agriculture and, as a result, the lack of jobs, the rural population began to migrate massively to the Buryat Republic’s capital. However, the prices for houses and apartments in the city center were unbearable for many migrants, so the purchase of land plots and the construction of houses were affordable for many. The estrangement of agricultural lands and their inclusion in residential areas allowed the city of Ulan-Ude and suburban areas to somewhat expand the territory of settlements and create a huge number of GNPP (gardeners non-profit partnership) and DNPP (dacha non-profit partnership). The city and suburban areas were not ready for such a flow and were not able to provide the newly arrived migrants with social, road transport and communal infrastructure. As a result, the city was surrounded by a suburbia almost devoid of any infrastructure. There are some elements of false urbanization or squatter area, which is a type of urbanization in which the urban population rapid growth is not accompanied by a commensurate increase in urban functions. In recent years, the growth rate of suburban settlements has decreased, mainly due to mortgages, which have become more affordable for the population and the growth of multi-storey construction. In addition, the village is slowly depleting the human resources that feed the city and the suburbs. In other words, those who wanted to move to the city have already moved

scholarly journals Assessment of PM10 in Aurangabad City of Central India

2016 ◽  
Vol 5 (2) ◽  
pp. 61-74 ◽  
Author(s):  
Geetanjali Kaushik ◽  
Arvind Chel ◽  
Sangeeta Shinde ◽  
Ashish Gadekar
Keyword(s):  
Air Pollution ◽  
Particulate Matter ◽  
Fine Particulate Matter ◽  
Tall Buildings ◽  
Central India ◽  
Air Pollutant ◽  
Traffic Density ◽  
High Pollution ◽  
High Concentrations ◽  
The City

Almost 670 million people comprising 54.5% of our population reside in regions that do not meet the Indian NAAQS for fine particulate matter. Numerous studies have revealed a consistent correlation for particulate matter concentration with health than any other air pollutant. Aurangabad city a rapidly growing city with population of 1.5 million is home to five major industrial areas, the city is also known for its historical monuments which might also be adversely affected from air pollution. Therefore, this research aims at estimating PM10 concentrations at several locations across Aurangabad. The concentration of PM10 was highest at the Railway Station followed by Waluj (an industrial zone) and City chowk is the centre of the city which has high population, tall buildings, few open spaces which causes high congestion and does not allow the particulates to disperse. Other locations with high concentrations of PM are Mill corner, Harsul T-point, Kranti Chowk, Seven Hill, TV centre and Beed Bye pass. All these locations have narrow roads, high traffic density, poor road condition with pot holes and few crossing points which cause congestion and vehicle idling which are responsible for high pollution. Therefore, it is evident that air pollution is a serious issue in the city which may be further aggravated if it is not brought under control. Hence, strategies have to be adopted for combating the menace of air pollution.INTERNATIONAL JOURNAL OF ENVIRONMENTVolume-5, Issue-2, March-May 2016, Page :61-74

scholarly journals Metodología para la rehabilitación de grandes centros comerciales

2018 ◽  
Author(s):  
Jorge Carretero Monteagudo
Keyword(s):  
Urban Area ◽  
Sao Paulo ◽  
Shopping Mall ◽  
Low Density ◽  
São Paulo ◽  
Shopping Malls ◽  
Urban Background ◽  
Suburban Areas ◽  
Architectural Features ◽  
The City

El estudio de las características urbanas y arquitectónicas, y las posibles medidas de rehabilitación para los centros comerciales de gran tamaño, fueron el punto de partida para evaluar la sostenibilidad medioambiental y urbana de los mismos. En la presente tesis, se desarrolló una metodología de evaluación de cara al análisis de las medidas de rehabilitación que pudieran aplicarse sobre un centro comercial. Se consideraron cuatro familias de medidas: Rehabilitación ecoeficiente, inserción de elementos verdes, inserción de usos en el centro, y una familia de medidas de rehabilitación aplicadas sobre el entorno urbano. Ocho casos de centros comerciales fueron analizados: tres en el contexto urbano de Sao Paulo, tres en el contexto urbano de Madrid, y tres en el contexto de la Norteamérica suburbana. El resultado del estudio permitió establecer un criterio para orientar las operaciones de rehabilitación de centros comerciales hacia ciertos ámbitos de la sostenibilidad. Las conclusiones finales del estudio fueron que es importante considerar varias medidas de rehabilitación de forma simultánea, a la vez que considerar en la escala urbana global para lograr una mejora relevante de cara a la sostenibilidad. Esto último especialmente en centros comerciales ubicados en entornos periféricos de baja densidad. Abstract. The studio of both the urban and architectural features, as well as the retrofitting means of application on a shopping mall, was the parting point to evaluate the sustainability of large surface shopping malls. A methodology to evaluate the efficacy of the retrofitting means of application on malls was developed, considering four families of retrofitting means: Eco efficient refurbishment, insertion of green elements, insertion of uses, and a family of retrofitting means applied in the urban area surrounding the mall. Eight cases were analyzed: Three located in the urban background of the city of Sao Paulo, Three located in Madrid, and two located in the background of the Suburban U.S.A. The result of this study was the establishment of criteria to focus the operations of any retrofitting program applied on a shopping mall towards some facts related to sustainability. Being the final conclusions, the affirmation that is important to consider various means of retrofitting simultaneously on the shopping mall, as well as to consider the wide urban scale to be retrofitted, in order to achieve a relevant improvement towards sustainability. Specially in cases of shopping malls located in low density suburban areas.

scholarly journals Magnetic Properties and Size of Microscopic Pollutant Particles in the Urban Area of Coimbra

2008 ◽  
Vol 14 (S3) ◽  
pp. 144-145 ◽  
Author(s):  
C.R. Gomes ◽  
A.M. Dinis ◽  
A.F. Rocha ◽  
E.M.C. Gomes ◽  
L.F. Neves
Keyword(s):  
Magnetic Properties ◽  
Particulate Matter ◽  
Human Health ◽  
Urban Area ◽  
Motor Vehicle ◽  
Air Pollutant ◽  
Nerium Oleander ◽  
Vehicle Traffic ◽  
Pollution Levels ◽  
The City

Pollutant particles of small size are produced and resuspended every day as a result of traffic. These particles, identified as particulate matter (PM10, PM2.5), can affect human health when inhaled, mostly the respiratory and cardiopulmonary systems. Some of these particles are ferromagnetic (s.l.) and their magnetic properties indicate their sources, composition and size. Coimbra is an inland city situated in the center of Portugal at a distance of 40 km from the coast. Coimbra has a total area of 320 km2 and a population of about 168.000. Motor vehicle traffic is the main source of air pollutant in the city. The main goal of this research is to assess pollution levels in the urban area of Coimbra using the magnetic properties of microscopic pollutant particles on Nerium oleander leaves.

scholarly journals Characteristics and Extent of Particulate Matter Emissions of a Ropeway Public Mobility System in the City Center of Perugia (Central Italy)

Atmosphere ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1356
Author(s):  
Beatrice Moroni ◽  
Stefano Crocchianti ◽  
Federica Bruschi ◽  
Chiara Petroselli ◽  
Alessandro Di Menno di Bucchianico ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Central Italy ◽  
Road Dust ◽  
High Volume ◽  
Atmospheric Particulate Matter ◽  
Aerosol Sampling ◽  
City Center ◽  
Mobility System ◽  
The Impact ◽  
The City

Minimetrò (MM) is a ropeway public mobility system that has been in operation in the city of Perugia for about ten years to integrate with urban mobility and lighten vehicular traffic in the historic city center. The purpose of this work was to evaluate the impact of MM as a source of pollutants in the urban context, and the exposure of people in the cabins and the platforms along the MM line. These topics have been investigated by means of intensive measurement and sampling campaigns performed in February and June 2015 on three specific sites of the MM line representative of different sources and levels of urban pollution. Stationary and dynamic measurements of particle size distribution, nanoparticle and black carbon aerosol number and mass concentrations measurements were performed by means of different bench and portable instruments. Aerosol sampling was carried out using low volume and high-volume aerosol samplers, and the samples nalysed by off-line methods. Results show that MM is a considerable source of atmospheric particulate matter having characteristics very similar to those of the common urban road dust in Perugia. In the lack of clear indications on road dust effect, the contribution of MM to the aerosol in Perugia cannot be neglected.

scholarly journals Building Rejuvenation Approach Through Revitalization, Rehabilitation and Redevelopment - Case of Vertical Housing in Jakarta

2018 ◽  
Vol 67 ◽  
pp. 04036
Author(s):  
Apriansyah Saputra ◽  
Hendrajaya Isnaeni
Keyword(s):  
Urban Area ◽  
Low Income ◽  
The Other ◽  
Population Increase ◽  
Land Value ◽  
City Center ◽  
Building Capacity ◽  
Housing Area ◽  
Age Limit ◽  
The City

Jakarta, as the center of government, trading, business, and industry becomes the main destination for many migrants to find jobs. This results in the massive population increase in Jakarta every year while the urban area availability has contrast proportion with the needs of housing area. The limited urban area, as well as the increase of land value, is not possible to build new housing area in the city center. The solution of this problem is rejuvenation of the buildings that have already existed. In this case, the writers carry the rejuvenation case of the vertical housing in Kebon Kacang XI that is close to the age limit of the building and has looked slum thus created visibility gap between the vertical housing and the other housing areas and could get the gentrification results. Besides, Kebon Kacang XI vertical housing is located in the center of Jakarta and has increasing BCR so that it is able to maximize the unit of building capacity to fulfill the needs of affordable houses in the city. The aims of this paper are to find out and to compare three different forms of rejuvenation as the solution of housing area provision for the low-income people in the city center through revitalization, rehabilitation, and redevelopment approach.

scholarly journals Penentuan Pusat-pusat Kegiatan Baru sebagai Alternatif untuk Mengurangi Kemacetan Kota Bogor

2018 ◽  
Vol 1 (3) ◽  
pp. 287
Author(s):  
Dewi Annisa Rizki ◽  
Ernan Rustiadi ◽  
Soekmana Soma
Keyword(s):  
Gravity Model ◽  
Descriptive Analysis ◽  
Traffic Density ◽  
City Center ◽  
Suburban Areas ◽  
The North ◽  
Production Area ◽  
The City ◽  
Gravitation Model ◽  
Spatial Plan

Bogor city is facing very serious congestion problems. Rearrangement of the spatial structure of the urban growth centers could improve the city's transportation system. This study aims to map the density of traffic, analyze the hierarchy of growth centers, analyze the spatial interactions and formulate alternative arrangement of the centers of the new activities. The study was conducted through descriptive analysis, Schallogram method, the Spatial Gravitation Model and TOPSIS. Schallogram analysis is used to analyze the hierarchy level of service. The Gravity Model is used to analyze the interaction between the regions. TOPSIS analysis is used to identify priority areas and new growth centers. This study analyzed data on the volume of vehicles, facilities area, population, road length, road network maps, and spatial plan (RTRW). The areas in the city center had the highest traffic density and the highest hierarchical. While suburban areas tend to have the lowest hierarchy. Based on the results of gravity model analysis, the areas with the highest attraction located in the city center and extends along the corridor to the north and the south. While the production area spread around the suburbs. Based on the analysis TOPSIS recommend new growth centers, namely Margajaya, Cimahpar, and Bojongkerta.

scholarly journals Fitting Volume Delay Functions under interrupted and uninterrupted flow conditions at Greek urban roads

2021 ◽  
pp. 1-16
Author(s):  
Roza E. Barka
Keyword(s):  
Urban Area ◽  
Flow Conditions ◽  
City Center ◽  
Pertinent Literature ◽  
Ring Road ◽  
Traffic Conditions ◽  
Loop Detectors ◽  
Video Recordings ◽  
The City ◽  
Derived Data

This paper presents the calibration of the most commonly used Volume Delay Functions (VDF): BPR, Conical, Akcelik and Modified Davidson, for an urban area populated by over 1 million inhabitants, the city of Thessaloniki in Greece. The estimation of the unknown coefficients was carried out for a typical freeway, the ring road of the city, and selected arterial and collected roads of the city center, through recent data of hourly observed vehicle speeds and volumes obtained from video recordings and loop detectors. The BPR function yielded the highest accuracy across all the examined road sections and was characterized as the most suitable to simulate and interpret the existing traffic conditions. The estimated coefficients differed significantly from the values proposed in the pertinent literature, which highlights the importance of using locally derived data for the calibration of the VDFs.

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