Estimasi konsentrasi karbon monoksida (CO) pada kasus pencemaran udara di kota Surabaya dengan metode universal kriging

Oktaviani, Riskha Tri (2015) Estimasi konsentrasi karbon monoksida (CO) pada kasus pencemaran udara di kota Surabaya dengan metode universal kriging. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Salah satu polutan berbahaya yang memberikan sumbangsih besar dalam pencemaran udara adalah karbon monoksida (CO). Pengukuran konsentrasi CO di udara dilakukan melalui suatu proses panjang menurut Standar Nasional Indonesia (SNI), sehingga tidak semua wilayah di Surabaya dapat dilakukan pengukuran terhadap polutan tersebut. Oleh karena itu dilakukan estimasi konsentrasi CO dengan universal kriging. Estimasi CO didapatkan dengan semivariogram teoritis Exponential, karena nilai MSE model Exponential lebih kecil daripada model Spherical dan Gussian. Nilai estimasi CO yang dihasilkan bervariasi antara range 6.92 ppm sampai 15.19 ppm yang terbagi ke dalam 5 kelas. Estimasi CO dominan berkisar antara 10.02 ppm sampai 11.87 ppm. Konsentrasi CO terkecil berada di Perempatan Jl Tropodo-Jl Bandara Djuanda sebesar 6.92 ppm. Konsentrasi CO terbesar berada di Sukomanunggal di Jalan Sukomanunggal sebesar 15.19 ppm. Estimasi konsentrasi CO yang dihasilkan mempunyai nilai yang beragam dengan varians estimasi CO sebesar 4.8. Estimasi CO dengan metode universal kriging lebih baik daripada metode ordinary kriging dengan kriteria nilai MSE hasil estimasi yang lebih kecil yaitu 1.52 dibanding 2.18 pada ordinary kriging. Selain itu hasil estimasi dengan universal kriging lebih beragam dengan varians estimasi sebesar 4.89 dan range estimasi sebesar 8.27 sedangkan ketika menggunakan ordinary kriging varians estimasi hanya sebesar 2.41 dan range estimasi sebesar5.66. =========================================================================================================== One of the pollutants that has major contribute to air pollution is CO. Measuring the exact concentrations of CO in the air requires a long process, according to Indonesian National Standard (SNI), therefore not all of the areas in Surabaya can be measured directly. One way to stimate the concentration of CO in area is to use universal kriging. CO concentration is estimated using the Exponential theoretical semivariogram, because the MSE of Exponential models are smaller than the MSE of Sherical and Gaussian model. The resulting CO estimation value is varied between 6.92 ppm to 15.19 ppm and is divided to 5 class. The dominant CO estimation value is between 10.02 ppm to 11.87 ppm. The lowest CO concentration is in Cross Tropodo street-Bandara Djuanda street with a value of 6.92 ppm. The highest CO concentration is in Sukomanunggal at Sukomanunggal street with a value of 15.19 ppm. The resulting CO estimation value is varied with an estimated variance of 4.89. CO estimation using universal kriging method in this case is proven to be better than CO estimation using ordinary kriging method. It is shown that universal kriging has the lower MSE estimation with a value of 1.52 than ordinary kriging has the MSE estimation with a value of 2.18. besides that, universal kriging has the highest estimad variance and range with a value of 4.89 and a value of 8.27. meanwhile ordinary kriging just has estimated variance and range with a value of 2.41 and a value of 5.66.

Item Type: Thesis (Undergraduate)
Additional Information: RSSt 511.42 Okt e
Uncontrolled Keywords: Karbon Monoksida (CO); Semivariogram; Universal Kriging
Subjects: H Social Sciences > HA Statistics > HA29 Theory and method of social science statistics
T Technology > TD Environmental technology. Sanitary engineering > TD883.5 Air--Pollution
Divisions: Faculty of Mathematics, Computation, and Data Science > Statistics > (S1) Undergraduate Theses
Depositing User: - Taufiq Rahmanu
Date Deposited: 19 Jun 2019 02:57
Last Modified: 19 Jun 2019 02:57
URI: http://repository.its.ac.id/id/eprint/63153

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