Development of industries and increase in transportation usage directly affect air quality. Some pollutants have negative impacts on human health and the environment, such as particulate matter 10 microns (PM 10) and ozone (O 3). Distribution of PM 10 and O 3 concentrations from various emission sources in urban areas provide basic information to facilitate development of policies, programs and regulations related to air pollution control. This study aims to map and analyse the air quality index distribution of PM 10 and O 3 in the city of Medan, Indonesia. This research was conducted by sampling PM 10 and O 3 at 12 sampling points throughout the city. The concentration of PM 10 was measured using laser dust monitor model LD 1, while the concentration of O 3 was measured using impinger and chemiluminescent analysis. The results showed that the air quality index obtained was from 23 (good) to 155 (unhealthy) for PM 10 , and from 8 (good) to 87 (medium) for the O 3 parameter. The mapping of air quality index distribution for PM 10 and O 3 was done by using Surfer 10 to illustrate the distribution of areas with the unhealthy category for PM 10 and the medium category for O 3 located in Medan Belawan sub-district. Air pollution control can be done by applying clean technology for the industry sector and mass transportation for transportation sector.
Purpose of this study is to determine the distribution pattern of carbon monoxide (CO) from Singamangaraja street by using Finite Length Line Source (FLLS) method and map to the distribution with GIS aplication. Based on the results of observations of traffic volume on the Singamangaraja street is 7.591 units/hour (morning) and 7.433 units/hour (noon). The amount emission rate is 49.171.7 ?g/m.s in the morning and 46.943.1 ?g /m.s in the noon. According to calculations FLLS the highest CO concentration is at roadside (20.340 ?g/Nm3 in the morning and 18.340 ?g/Nm3 in the noon). Based on direct measurement of the concentration of a maximum of 18.323 ?g /Nm3 in the morning and 17.177 ?g /Nm3 at noon. Spatial analysis with Geographic Information System generate distribution impact area of the source was Harjosari 2 district. Comparison between modeling and field survey using wilmotts index method had d=0,69-0,84, R=0,93-0,96, dan NMSE=0,02-0,04. Statistic validation had 16,5%-17% accuracy and still in range of Gaussian criteria (10%- 20%).Keyword: CO, finite length line source, SIG, transportationAbstrak-Penelitian ini bertujuan untuk mengetahui pola sebaran karbon monoksida (CO)dari Jalan Sisingamangarajadengan metode Finite Length Line Source (FLLS) dan memetakan sebaran dengan aplikasi SIG. Berdasarkan hasil pengamatan volume lalu lintas,total jumlah kendaraan adalah 7.591 unit/jam (pagi) dan 7.433 unit/jam (siang). Jumlah kendaraan tersebut menyumbangkan laju emisi sebesar 49.171,7 ?g/m.s pada pagi hari dan pada siang hari sebesar 46.943,1 ?g/m.s. Bedasarkan perhitungan dengan FLLS konsentrasi CO paling tinggi adalah pada tepi jalan (roadside) yaitu sebesar 20.340 ?g/Nm3 pada pagi hari dan 18.340 ?g/Nm3 pada siang hari. Analisa spasial dengan Sistem Informasi Geografis menghasilkan wilayah sebaran dampak dari sumber tersebut adalah Kelurahan Harjosari 2. Perbandingan hasil pemodelan dan hasil pengukuran di lapangan dengan wilmotts index menghasilkan nilai d=0,69-0,84, R=0,93-0,96, dan NMSE=0,02-0,04. Hasil validasi memiliki keakuratan 16,5%-17%.Kisaran ini masih dalam kriteria pemodelan Gaussian (10%- 20%).Keyword: CO, finite length line source, SIG, transportasi
The development of industry and the increase of transportation mode are directly proportional to the decrease in air quality. Some important pollutants have a negative impact on human health and the environment such as nitrogen dioxide (NO2) and ozone (O3). Distribution of NO2 and O3 concentrations from various sources of emissions in urban areas will provide basic information in the determination of policies, programs and regulations related to air pollution control. This study aims to map and analyze the concentration distribution of NO2 and O3 pollutants in Medan City. This research was conducted by a manual sampling of NO2 and O3 at 12 (twelve) points in Medan City. The sampling of NO2 and O3 concentrations is using impinger and then analyzed in a laboratory. The results showed that NO2 pollutant concentration in Medan City ranged from 21.33-306.19 μg/m 3 . Meanwhile, for O3 concentrations ranged from 19.7-205.8 μg/m 3 . Mapping of NO2 and O3 concentration using Geographic Information System obtained area that has the highest concentration of both NO2 and O3 is in Sub District of Medan Belawan. Furthermore, efforts to control air pollution can be done by applying clean technology to industry and encouraging the use of mass transportation.
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