Kajian Dispersi Polutan PM2,5 di Jakarta Menggunakan Weather Research and Forecasting with Chemistry (WRF-Chem)

Fatma, Mella Aynin (2023) Kajian Dispersi Polutan PM2,5 di Jakarta Menggunakan Weather Research and Forecasting with Chemistry (WRF-Chem). Other thesis, Institut Teknologi Sepuluh Nopember.

Text 03211940000012-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 April 2025. Download (8MB) | Request a copy

Abstract

Aktivitas industri, kegiatan transportasi, dan aktivitas antropogenik lainnya dapat memicu adanya pencemaran udara di suatu wilayah. Menurut World Air Quality tahun 2021, Jakarta menempati peringkat tertinggi ke-12 dengan konsentrasi rata-rata tahunan PM2,5 mencapai 39,2 µg/m3. Salah satu pemodelan yang dapat digunakan untuk mengetahui persebaran dan konsentrasi polutan di atmosfer adalah WRF-Chem. Penelitian ini bertujuan untuk mengkaji akurasi model WRF-Chem dalam memperkirakan sebaran PM2,5. Penelitian ini juga dilakukan untuk mengetahui karakteristik persebaran serta konsentrasi PM2,5 berdasarkan variasi musiman dan per jam. Simulasi model WRF-Chem dilakukan pada Bulan Februasi 2021 dan Bulan Agustus 2021 di SPKU Jagakarsa (DKI 3) dan SPKU Lubang Buaya (DKI 4). Simulasi ini menggunakan data meteorologi global GFS dari National Atmospheric Administration (NOAA) dan data emisi global dari Emission Database for Global Atmospheric Research (EDGAR) tahun 2015. Simulasi model meliputi tahap pre-processing, processing, dan post-processing. Pre-processing merupakan tahap persiapan untuk pembuatan domain dan persiapan data meteorologi pada bagian WRF Pre-Processing System (WPS). Tahapan processing dilakukan untuk pemilihan parameterisasi yang menjalankan proses fisik dan kimia di atmosfer. Tahapan post-processing dilakukan untuk analisis hasil visualisasi dan uji verifikasi hasil model dengan observasi. Data observasi yang digunakan yaitu data DLH Tahun 2021 parameter konsentrasi PM2,5, temperatur, dan kecepatan angin. Uji verifikasi dalam penelitian ini menggunakan pengukuran secara statistik dengan metode MAPE dan korelasi pearson. Hasil penelitian menunjukkan bahwa WRF-Chem mampu merepresentasikan pola fluktuasi dengan cukup baik namun belum sempurna dalam memprediksi output value parameter PM2,5 dan kecepatan angin. Hasil perhitungan dengan metode MAPE Bulan Februari pada parameter PM2,5, temperatur, dan kecepatan angin secara berturut-turut adalah 132,2%; 6,2%; dan 1001,9% (DKI 3) serta 84,7%; 4,5%, dan 12741,1% (DKI 4). Adapun pada bulan Agustus yaitu 59,8%; 8,4%; dan 403,7% (DKI 3) serta 70,5%; 4,5%, dan 17360,7% (DKI 4). Pola sebaran PM2,5 pada Bulan Februari menunjukkan polutan dominan tersebar ke wilayah Jakarta Timur dan Jakarta Selatan. Sementara pada Bulan Agustus PM2,5 dominan tersebar ke Jakarta Utara, Jakarta Barat, dan sebagian ke Jakarta Selatan. Hasil model dan observasi menunjukkan konsentrasi PM2,5 pada Bulan Agustus cenderung lebih tinggi daripada Bulan Februari. Rata-rata konsentrasi PM2,5 hasil model pada 2 dan 3 Februari 2021 yaitu 12,28 µg/m3 dan 10,38 µg/m3 (DKI 3) serta 13,47 µg/m3 dan 9,61 µg/m3 (DKI 4). Adapun rata-rata konsentrasi PM2,5 pada 2 dan 3 Agustus 2021 yaitu 17,84 µg/m3 dan 13,87 µg/m3 (DKI 3) serta 11,7 µg/m3 dan 13,29 µg/m3 (DKI 4).
==============================================================================================================================
Industrial activities, transportation activities, and other anthropogenic activities can trigger air pollution in an area. According to World Air Quality In 2021, Jakarta ranks 12th highest with an annual average concentration of PM2,5 up to 39.2 µg/m3. One model that can be used to determine the distribution and concentration of pollutants in the atmosphere is WRF-Chem. This study aims to examine the accuracy of the WRF-Chem model in estimating the distribution of PM2,5. This research was also conducted to determine the characteristics of the distribution and concentration of PM2,5 based on seasonal and hourly variations. The WRF-Chem model simulation was carried out in February 2021 and August 2021 at SPKU Jagakarsa (DKI 3) and SPKU Lubang Buaya (DKI 4). This simulation uses global meteorological data from National Atmospheric Administration (NOAA) and global emissions data from Emission Database for Global Atmospheric Research (EDGAR) in 2015. The model simulation includes pre-processing, processing, and post-processing. Pre-processing is the preparatory stage for creating the domain and preparing meteorological data in the WRF Pre-Processing System (WPS). In processing carried out for the selection of parameters that carry out physical and chemical processes in the atmosphere. Post-processing process carried out to analyze the results of visualization and verification test of model results with observation. The observation data used is from DLH on 2021 for PM2,5, temperature, and wind speed. The verification test in this study uses statistical measurements using the MAPE and pearson correlation. The results show that WRF-Chem is able to represent fluctuation patterns quite well but is not perfect in predicting output value in parameter PM2,5 and wind speed. The results of calculations using the MAPE method for February on the parameter PM2.5, temperature, and wind speed respectively were 132.2%; 6.2%; and 1001.9% (DKI 3) and 84.7%; 4.5%, and 12741.1% (DKI 4). As for August, about 59.8%; 8.4%; and 403.7% (DKI 3) and 70.5%; 4.5%, and 17360.7% (DKI 4). The distribution pattern of PM2.5 in February shows that PM2.5 is dominantly spread to the East Jakarta and South Jakarta areas. While in August PM2.5 was dominantly spread to the Jakarta area, North Jakarta, West Jakarta, and partly to South Jakarta. The results of the model and observation show that the concentration of PM2.5 in August tends to be higher than in February. The average concentrations of PM2.5 as a result of the model on 2 and 3 February 2021 were 12.28 µg/m3 and 10.38 µg/m3 (DKI 3) and 13.47 µg/m3 and 9.61 µg/ m3 (DKI 4). The average concentrations of PM2.5 on 2 and 3 August 2021 were 17.84 µg/m3 and 13.87 µg/m3 (DKI 3) and 11.7 µg/m3 and 13.29 µg/m3 (DKI 4).

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Dispersi polutan, Jakarta, konsentrasi polutan, PM2,5, WRF-Chem, pollutant concentration, pollutant dispersion
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD883.5 Air--Pollution
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Environmental Engineering > 25201-(S1) Undergraduate Thesis
Depositing User:	Mella Aynin Fatma
Date Deposited:	31 Jan 2023 17:35
Last Modified:	31 Jan 2023 17:35
URI:	http://repository.its.ac.id/id/eprint/95906

Actions (login required)

View Item