Sains Malaysiana 49(10)(2020): 2345-2358

http://dx.doi.org/10.17576/jsm-2020-4910-02

Assessing the Relationship between Pollution Sources and Water Quality Parameters of Sungai Langat Basin using Association Rule Mining

(Menilai Hubunganantara Sumber Pencemaran dan Parameter Kualiti Air di Lembangan Sungai Langat menggunakan Peraturan Persatuan Perlombongan)

NURIZAH ABDUL HASIB & ZALINDA OTHMAN*

Faculty of Information Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

Diserahkan: 18 September 2019/Diterima: 6 Mei 2020

ABSTRACT

Due to water pollution, the water quality in Sungai Langat Basin is declining. This study was conducted in this regard to identify the sources of pollution and to analyse the relationship between sources of pollution and water quality parameters. The Malaysian Department of Environment (DOE) has provided data on pollution sources and water quality. Both data are combined and pre-processed through association rule mining for further modelling processes. Apriori algorithm was used to generate rules in finding any relationships between sources of pollution and water quality parameters. Water quality experts had analysed and validated the generated rules. The analysis of expert acceptance showed that 65% of the formulated rules were agreed by the experts while 35% of the rules were disagreed. Furthermore, the findings showed that all experts agreed that there was a relation between NH₃-N values ranging from 0.9 to 2.7 and the sewage as a source of pollution. Besides, as agreed by all experts, either effluent, sewage or livestock is the pollution source of Sungai Langat.

Keywords: Association rule mining; pollution source identification; Sungai Langat Basin; water pollution

ABSTRAK

Kualiti air di Lembangan Sungai Langat semakin merosot ekoran daripada pencemaran air yang berlaku. Sehubungan itu, kajian ini dijalankan untuk mengenal pasti punca pencemaran dan menganalisis hubungan antara punca pencemaran dan parameter kualiti air. Data punca pencemaran dan data kualiti air diperoleh daripada Jabatan Alam Sekitar Malaysia. Kedua-dua data digabungkan dan diproseslebih awal menggunakan kaedah perlombongan petua sekutuan untuk digunakan dalam proses pemodelan seterusnya. Algoritma Apriori yang terdapat dalam kaedah perlombongan petua sekutuan digunakan untuk mendapatkan petua yang mengaitkan hubungan antara punca pencemaran dan parameter kualiti air. Petua yang dijana dianalisis sebelum disahkan oleh pakar. Analisis penerimaan pakar menunjukkan rumusan petua yang dipersetujui oleh pakar adalah sebanyak 65% manakala 35% tidak dipersetujui oleh pakar. Keputusan kajian menunjukkan semua pakar bersetuju bahawa terdapat hubungan antara nilaiNH₃-N dalam lingkungan 0.9 hingga 2.7 dengan punca pencemaran kumbahan. Selain itu, punca pencemaran Sungai Langat yang telah dipersetujui oleh semua pakar adalah sama ada efluen, kumbahan atau ternakan.

Kata kunci: Lembangan Sungai Langat; pencemaran air; pengenalan punca pencemaran; perlombongan petua sekutuan

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*Pengarang untuk surat-menyurat; email: zalinda@ukm.edu.my