Sains Malaysiana 45(12)(2016): 1857–1867

http://dx.doi.org/10.17576/jsm-2016-4512-10

 

Kesan Gabungan Aktiviti Guna Tanah dan Perubahan Musim terhadap Kualiti Sumber Air:

Kajian Kes di Terusan Utara, Kedah

(Impact of the Combination of Land Use Activities and Seasons Change on the Water Resources Quality: Case Study of North Canal, Kedah)

 

MOHD. SUHAIMI AHMAD*, MUHAMMAD RIDWAN FAHMI, MUSTAQQIM ABDUL RAHIM & NAIMAH IBRAHIM

 

School of Environmental Engineering, University of Malaysia Perlis (UniMAP), Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis Indera Kayangan, Malaysia

 

Diserahkan: 18 Februari 2016/Diterima: 22 Julai 2016

 

 

ABSTRAK

Suatu kajian untuk menilai kesan gabungan aktiviti guna tanah dan perubahan musim terhadap kualiti sumber air telah dijalankan di Terusan Utara, Kedah. Kajian ini dijalankan di lima stesen terpilih selama 12 bulan berdasarkan Indeks Kualiti Air (WQI) dan Piawaian Interim Kualiti Air Kebangsaan (INWQS). Kajian mendapati kualiti air di Terusan Utara berada pada Kelas III dan berlaku peningkatan kualiti air dari hulu ke hilir. Hampir semua stesen berpotensi sebagai punca pencemaran berdasarkan aktiviti guna tanah terutamanya di Pelubang, Jitra serta Tunjang. Kajian menunjukkan terdapat perbezaan yang signifikan ketika perubahan musim pada DO, TSS serta BOD, namun tidak pada ammonia, pH dan COD. Secara amnya, kombinasi aktiviti guna tanah dan perubahan musim boleh mempengaruhi atau memberi kesan terhadap kualiti sumber air. Oleh itu, tindakan segera perlu dilakukan untuk mengawal punca pencemaran bagi memastikan kualiti sumber air di Terusan Utara kekal terpelihara.

 

Kata kunci: Guna tanah; INWQS; perubahan musim; sumber air; WQI

 

ABSTRACT

A study to assess the combined effects of land use activities and seasonal changes in the water resources quality has been carried out in North Channel, Kedah. The study was conducted in five selected stations for 12 months based on the Water Quality Index (WQI) and the Interim National Water Quality Standards (INWQS). The study found that the water quality in the North Channel is in Class III with improvement of water quality from upstream to downstream. Almost all stations have shown that potential as sources of contamination based on land use activities especially in Pelubang, Jitra and Tunjang. The studies showed a significant difference whereby a season change in DO, TSS and BOD but not in ammonia, pH and COD. Generally, the combination of land use activities and seasonal changes can be affected or impacted to the water resources quality. Therefore, an urgent action is needed to control the sources of pollution to ensure the quality of water resources in the North Channel is preserved.

 

Keywords: INWQS; land used; seasons change; water resources, WQI

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