scholarly journals Traffic air emission inventory and measures to reduce air pollution in Ho Chi Minh City, Vietnam

2020 ◽  
pp. 29-38
Author(s):  
Quoc Bang Ho ◽  
Hoang Ngoc Khue Vu ◽  
Thoai Tam Nguyen ◽  
Thi Thuy Hang Nguyen
Keyword(s):  
Air Quality ◽  
Action Plan ◽  
Ho Chi Minh City ◽  
Air Emissions ◽  
Emission Data ◽  
Air Emission ◽  
Industrial Parks ◽  
Clean Air ◽  
The City

Together with the urbanization, industrial activities are increasing and transportation system is being rapidly developing. In 2017, the population of Ho Chi Min city (HCMC) is over 8.6 million. The city has 8 million vehicles including 637,323 automobiles and more than 7,339,522 motorcycles. Up to now, the city has a total of 2708 factories generating air emissions (including 3 processing zones (EPZs) and 16 industrial parks (IPs), with thousands of factories outside the IPs / EPZs), resulting in an increase in emissions from these activities and affecting the air quality of the city. Therefore, in this study (i) collect air emission data, evaluate and calculate of air emissions by applying EMISENS emission calculation models and survey and traffic counting methods; (ii) Develop clean air action plan and climate change mitigation for Ho Chi Minh City. The results showed that on-road activities are the major contributor, accounting for 88% of NOx, 99% of CO, 79% of SO2, 99% of NMVOC, 88% of PM in total emissions from transportation activities. Key finding in this study is that harbour activities contribute up to 20% of total SOx and 10% of total PM. Other sources (airport, harbour, bus station, rail way) only accounting for negligible amount of emissions. Emission maps showed that emissions in harbours and in central areas of the city as District 1, district 10, district 3 and district 5 are higher than the other districts. This study has also developed 13 measures to effectively manage air quality and reduce GHG in Ho Chi Minh City.

scholarly journals Inventory and mapping the air emissions from transportation activities in Ho Chi Minh city

2019 ◽  
Vol 3 (2) ◽  
pp. 100-114
Author(s):  
VU HOANG NGOC KHUE ◽  
HO MINH DUNG ◽  
NGUYEN THOAI TAM ◽  
NGUYEN THI THUY HANG ◽  
HO QUOC BANG
Keyword(s):  
Emission Inventory ◽  
Transportation System ◽  
Ho Chi Minh City ◽  
Air Emissions ◽  
The South ◽  
Negligible Amount ◽  
Bus Station ◽  
The City

Ho Chi Minh City plays a role as a leading economic and social center in the South of Vietnam, together with the urbanization, transportation system is being rapidly developing, resulting in an increase in emissions from these activities, and worsen the quality of the city. Therefore in this study, emission inventory for transportation has been conducted using the EMISENS model and then using GIS solfware to distribute the emissions in space in order to have the overall picture of air emissions of this city. The results showed that on-road activites especially from using motorcycles are the major contributer to air emissions in the city. On-road source in general accounting for 88% of NOx, 99% of CO, 79% of SO2, 99% of NMVOC, 88% of PM in total emissions from transportation activities. Key finding in this study is that hahour activities contribute up to 20% of total SOx and 10% of total PM. Other sources of transportation (airport, habour, bus station, rail way) only accounting for negligible amount of emissions Emission maps of transportation showed that central areas (District 1, District 10, District 3 and District 5) reached higer level of emissions than others. In additions, harbours areas as District 2, District 4 and District 7 where Saigon Port and Cat Lat Port are located in suffer the highest emissions of SO2, NOx and Dust.

On the issue of optimization of atmospheric air quality monitoring for the implementation of the Federal project «Clean Air»

2019 ◽  
pp. 931-936
Author(s):  
I. V. May ◽  
A. A. Kokoulina ◽  
S. Yu. Balashov
Keyword(s):  
Public Health ◽  
Air Quality ◽  
Environmental Monitoring ◽  
Monitoring System ◽  
Protection Measures ◽  
Atmospheric Air ◽  
Monitoring Programs ◽  
Clean Air ◽  
Effectiveness And Efficiency ◽  
The City

Introduction. The city of Chita of Zabaikalsky region is one of the cities of Russia, priority on level of pollution of atmosphere. Of the order of 130 impurities emitted by the sources of the city, 12 are monitored at 5 posts of the Roshydromet network. Maximum monthly average concentrations are formed by benz (a) pyrene (up to 56.8 MPC), hydrogen sulfide (12.3 MPC), suspended particles (up to 4PDC), phenol (up to 3.6 MPC). Significant emissions (59.73 thousand tons in 2018) are aggravated by the use of coal as a fuel by heat and power enterprises and the private sector, climatic and geographical features. Within the framework of the Federal project “Clean Air” of the national project “Ecology”, it is envisaged to reduce the gross emission of pollutants into the atmosphere of Chita by 8.75 thousand tons by 2024, which should lead to a significant improvement in the safety and quality of life of citizens. It is necessary to identify the most “risky “components of pollution for health.It is important to understand: whether the environmental monitoring system reflects the real picture of the dangers posed by pollution of the city’s atmosphere; whether there is a need to optimize the monitoring system for the subsequent assessment of the effectiveness and efficiency of measures; what impurities and at what points should be monitored in the interests of the population, administration and economic entities implementing air protection measures.The aim of the study is to develop recommendations for optimizing the program of environmental monitoring of air quality in the city of Chita, taking into account the criteria of danger to public health for the subsequent evaluation of the effectiveness and effectiveness of the Federal project “Clean Air”.Materials and methods. Justification of optimization of monitoring programs was carried out through the calculation of hazard indices, considering: the mass of emissions and toxicological characteristics of each chemical; the population under the influence. A vector map of the city with a layer “population density” was used as a topographic base. The indices were calculated for regular grid cells covering the residential area. For each cell, the repeatability of winds of 8 points from the priority enterprises and the population within the calculated cell were taken into account. As a result, each calculation cell was characterized by a total coefficient, taking into account the danger of potential impacts of emissions. Based on the results of the assessments, recommendations were formulated to optimize the placement of posts in the city and the formation of monitoring programs.Results. Indices of carcinogenic danger to the health of the population of Chita ranged from 584,805. 96 to 0.03 (priorities: carbon (soot), benzene, benz (a) pyrene); indices of non-carcinogenic danger — from 1,443,558. 24 to 0.00 (priorities: sulfur dioxide, inorganic dust containing 70–20% SiO2, fuel oil ash). The greatest danger to public health stationary sources of emissions form in the North-Western, Western and South-Eastern parts of the city. Roshydromet posts in these zones are absent.Conclusions. As part of the objectives of the project “Clean Air”, it is recommended to Supplement the existing state network of observations of atmospheric air quality in Chita with two posts; to include manganese, xylene, vanadium pentoxide in the monitoring programs, to carry out the determination of Benz(a)pyrene et all posts, which will allow to fully and adequately assess the danger of emissions of economic entities, as well as the effectiveness and efficiency of the provided air protection measures.

scholarly journals Measurements of Local Sources of Particulates with a Portable Monitor along the Coast of an Insular City

2020 ◽  
Vol 13 (1) ◽  
pp. 261
Author(s):  
Christos Petsas ◽  
Marinos Stylianou ◽  
Antonis Zorpas ◽  
Agapios Agapiou
Keyword(s):  
Air Quality ◽  
Significant Contribution ◽  
Anthropogenic Activities ◽  
Portable Monitor ◽  
Traffic Jam ◽  
Modern Cities ◽  
Anthropogenic Processes ◽  
The City ◽  
Coastal Front

The air quality of modern cities is considered an important factor for the quality of life of humans and therefore is being safeguarded by various international organizations, concentrating on the mass concentration of particulate matter (PM) with an aerodynamic diameter less than 10, 2.5 and 1 μm. However, the different physical and anthropogenic processes and activities within the city contribute to the rise of fine (<1 μm) and coarse (>1 μm) particles, directly impacting human health and the environment. In order to monitor certain natural and anthropogenic events, suspecting their significant contribution to PM concentrations, seven different events taking place on the coastal front of the city of Limassol (Cyprus) were on-site monitored using a portable PM instrument; these included both natural (e.g., dust event) and anthropogenic (e.g., cement factory, meat festival, tall building construction, tire factory, traffic jam, dust road) emissions taking place in spring and summer periods. The violations of the limits that were noticed were attributed mainly to the various anthropogenic activities taking place on-site, revealing once more the need for further research and continuous monitoring of air quality.

scholarly journals Contribution of Local and Transboundary Air Pollution to the Urban Air Quality of Fukuoka, Japan

Atmosphere ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 431
Author(s):  
Ayako Yoshino ◽  
Akinori Takami ◽  
Keiichiro Hara ◽  
Chiharu Nishita-Hara ◽  
Masahiko Hayashi ◽  
...  
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Urban Areas ◽  
Air Pollutants ◽  
Regional Scale ◽  
Gaseous Species ◽  
Transboundary Air Pollution ◽  
Local Air Pollution ◽  
The City

Transboundary air pollution (TAP) and local air pollution (LAP) influence the air quality of urban areas. Fukuoka, located on the west side of Japan and affected by TAP from the Asian continent, is a unique example for understanding the contribution of LAP and TAP. Gaseous species and particulate matter (PM) were measured for approximately three weeks in Fukuoka in the winter of 2018. We classified two distinctive periods, LAP and TAP, based on wind speed. The classification was supported by variations in the concentration of gaseous species and by backward trajectories. Most air pollutants, including NOx and PM, were high in the LAP period and low in the TAP period. However, ozone was the exception. Therefore, our findings suggest that reducing local emissions is necessary. Ozone was higher in the TAP period, and the variation in ozone concentration was relatively small, indicating that ozone was produced outside of the city and transported to Fukuoka. Thus, air pollutants must also be reduced at a regional scale, including in China.

scholarly journals IMPROVING THE QUALITY OF INFORMATION SUPPORT FOR MONITORING AIR POLLUTION FROM VEHICLES (CASE STUDY OF ST. PETERSBURG)

2021 ◽  
Vol 26 (2) ◽  
pp. 65-74
Author(s):  
V. N. Lozhkin ◽  
◽  
O. V. Lozhkina ◽  
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Information Support ◽  
Information Process ◽  
Limit Values ◽  
Standard Limit ◽  
The City ◽  
Original Information

Introduction. St. Petersburg is the cultural and sea capital of Russia. The city is characterized by environmental problems typical for the largest cities in the world. It has a technical system for instrumental online monitoring and computational forecasting of air quality. Methods. The system maintains the information process by means of computational monitoring of its current and future state. Results. The paper describes methodological approaches to the generation of instrumental information about the structure and intensity of traffic flows in the urban road network and its digital transformation into GIS maps of air pollution in terms of pollutants standard limit values excess. Conclusion. The original information technology for air quality control was introduced at the regional level in the form of an official methodology and is used in environmental management activities.

scholarly journals Konsep Penataan Ruang Terbuka Hijau Publik Di Kota Kecamatan Mengwi, Kabupaten Badung, Provinsi Bali

2017 ◽  
pp. 213
Author(s):  
I MADE AGUS DHARMADIATMIKA
Keyword(s):  
Open Space ◽  
Green Space ◽  
Action Plan ◽  
Phenomenological Approach ◽  
Qualitative Approach ◽  
Public Open Space ◽  
Neighborhood Scale ◽  
The City ◽  
Public Green Space

The purpose of this paper is to determine a plan of action structuring public green open space in the City of Mengwi, Knowing efforts to increase the quantity of green space in the City of Mengwi, and know the concept of development and structuring of public green open space in the City of Mengwi. This paper uses a qualitative approach with a phenomenological approach. The action plan structuring public green open space in the City of Mengwi action oriented with using this type of local parks, the action attribute applicative green city, square garden action, and action structuring neighborhood parks. Improving the quality of green space through enhancing functionality of existing green space, an increase in the proportion of green space utilization through neighborhood scale park like garden telajakan so that the amount of public open space can grow. The concept of the development of public green space in the City of Mengwi is based on the concept of implementing arrangement with green attributes, use local vegetation and observe the movement of the user system. Maximizing green space telajakan began by supplying bags garden is in the area of commercial and office.

scholarly journals The Provision and Accessibility to Parks in Ho Chi Minh City: Disparities along the Urban Core—Periphery Axis

Urban Science ◽  
2019 ◽  
Vol 3 (1) ◽  
pp. 37 ◽  
Author(s):  
Anh Hoang ◽  
Philippe Apparicio ◽  
Thi-Thanh-Hien Pham
Keyword(s):  
Geographical Information Systems ◽  
Hierarchical Classification ◽  
Spatial Accessibility ◽  
Geographical Information ◽  
Ho Chi Minh City ◽  
Urban Core ◽  
Different Types ◽  
Ascending Hierarchical Classification ◽  
The City

In Ho Chi Minh City (HCMC, Vietnam), there is now an urgent need for evaluating access to parks in an effort to ensure better planning within the context of rapid and increasingly privatized urbanization. In this article, we analyze the provision and accessibility to parks in HCMC. To achieve this, the information gathered was then integrated into the geographical information systems (GISs). Based on an Ascending Hierarchical Classification, we were able to identify five different types ranging in their intrinsic characteristics. The accessibility measurements calculated in the GISs show that communities are located an average of at least 879 meters away from parks, which is a relatively short distance. Children have a level of accessibility comparable to that of the overall population. Accessibility also seems to vary greatly throughout the City—populations residing in central districts (planned before 1996) enjoy better accessibility compared to those in peripheral neighborhoods (planned after 1996). Parks located in areas planned between 1996 and 2002 are the least accessible, followed by parks in areas planned after 2003. Our findings suggest possible approaches that could be used to help ensure the quality of parks and their spatial accessibility.

scholarly journals Assessing the impact of clean air action on air quality trends in Beijing using a machine learning technique

2019 ◽  
Vol 19 (17) ◽  
pp. 11303-11314 ◽  
Author(s):  
Tuan V. Vu ◽  
Zongbo Shi ◽  
Jing Cheng ◽  
Qiang Zhang ◽  
Kebin He ◽  
...  
Keyword(s):  
Machine Learning ◽  
Air Quality ◽  
Action Plan ◽  
Ambient Air ◽  
Meteorological Conditions ◽  
Assessment Process ◽  
Pollutant Emissions ◽  
Ambient Air Quality ◽  
Clean Air ◽  
The Impact

Abstract. A 5-year Clean Air Action Plan was implemented in 2013 to reduce air pollutant emissions and improve ambient air quality in Beijing. Assessment of this action plan is an essential part of the decision-making process to review its efficacy and to develop new policies. Both statistical and chemical transport modelling have been previously applied to assess the efficacy of this action plan. However, inherent uncertainties in these methods mean that new and independent methods are required to support the assessment process. Here, we applied a machine-learning-based random forest technique to quantify the effectiveness of Beijing's action plan by decoupling the impact of meteorology on ambient air quality. Our results demonstrate that meteorological conditions have an important impact on the year-to-year variations in ambient air quality. Further analyses show that the PM2.5 mass concentration would have broken the target of the plan (2017 annual PM2.5<60 µg m−3) were it not for the meteorological conditions in winter 2017 favouring the dispersion of air pollutants. However, over the whole period (2013–2017), the primary emission controls required by the action plan have led to significant reductions in PM2.5, PM10, NO2, SO2, and CO from 2013 to 2017 of approximately 34 %, 24 %, 17 %, 68 %, and 33 %, respectively, after meteorological correction. The marked decrease in PM2.5 and SO2 is largely attributable to a reduction in coal combustion. Our results indicate that the action plan has been highly effective in reducing the primary pollution emissions and improving air quality in Beijing. The action plan offers a successful example for developing air quality policies in other regions of China and other developing countries.

scholarly journals Study of the effect of fuel consumption and geographic conditions on Tehran’s air pollution

2020 ◽  
Author(s):  
Farid Rahimi
Keyword(s):  
Air Pollution ◽  
General Education ◽  
Petroleum Products ◽  
Low Grade ◽  
Economic Growth And Development ◽  
Public Transport System ◽  
Clean Air ◽  
High Level ◽  
The City

Studies show that Tehran is one of the most polluted cities in the world. This pollution is more due to the traffic of cars. According to statistics, Tehran only had 3 days of clean air in 2012 and 2013. The consumption of low-grade petroleum products by non-standard vehicles manufactured with old technol- ogy has caused air pollution to the city in the absence of an efficient public transport system as well as inefficient management. The results suggest that transition from this dilemma is possible through efficient laws, proper man- agement, the use of world-wide knowledge and culture and general education from the basic levels. Obviously, solving this problem will directly affect the quality of life of citizens, and its effects can be seen in the economic, health, environmental and social spheres. The indirect effects of the crisis can be predicted in economic growth and development, and even in the promotion of national security (at a high level).

scholarly journals Locating Bus Rapid Transit stops using GIS and AHP: the Vo Van Kiet - Mai Chi Tho route in Ho Chi Minh City

2016 ◽  
Vol 19 (2) ◽  
pp. 89-96
Author(s):  
Vu Hien Phan ◽  
Linh Thuy Pham ◽  
Anh Tuan Nguyen
Keyword(s):  
City Government ◽  
Ho Chi Minh City ◽  
Bus Rapid Transit ◽  
Rapid Transit ◽  
Transportation Services ◽  
Industrial Parks ◽  
Modern Cities ◽  
Weighted Factor ◽  
Gis Environment ◽  
The City

Bus Rapid Transit (BRT) is one of public vehicle systems in modern cities to provide transportation services fast, confortable, and cost saving. However, effectiveness of one BRT route depends on the locations of its stops. This study focuses on determining optimal locations to build the stops of a BRT route. Firstly, criteria having influences on effective operation of a BRT stop are explorered, consisting of i) traveling demands, e.g. buildings, offices, industrial parks, hopitals, etc; ii) public transportations, e.g. metro stations, bus stops, etc; and iii) roads, e.g. crossroads, parking lots, etc. Secondly, each criterion is assigned a weighted factor representative for its influence, determined by the AHP method. Finally, the progress of data processing in GIS environment is established to create a weighted overlay map from all criteria. Subsequently, locations having high values are reasonable to build BRT stops. This progress has been applied to locate BRT stops of the Vo Van Kiet – Mai Chi Tho route in Ho Chi Minh City. The result indicates 40 BRT stops along this route, and it is considered as a scientific reference to help the city government in decision making.

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