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Kajian Indeks Kualiti Air di Lembangan Sungai Paka, Terengganu (Water Quality Index Study in Paka River Basin, Terengganu)

Kajian Indeks Kualiti Air di Lembangan Sungai Paka, Terengganu (Water Quality Index Study in Paka River Basin, Terengganu),SUHAIMI SURATMAN,MOHAMAD AW

Kajian Indeks Kualiti Air di Lembangan Sungai Paka, Terengganu (Water Quality Index Study in Paka River Basin, Terengganu)  
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ABSTRAK Suatu kajian mengenai Indeks Kualiti Air (IKA) telah dijalankan di lembangan Sungai Paka, Terengganu. Ianya melibatkan pengukuran oksigen terlarut, pH, permintaan oksigen biokimia, permintaan oksigen kimia, jumlah pepejal terampai dan ammonia di lapan buah stesen pensampelan. Hasil kajian menunjukkan semua stesen pensampelan berada dalam status bersih kecuali dua stesen tercemar yang terletak di Sungai Rengat dan Sungai Rasau. Walau bagaimanapun, secara keseluruhannya purata nilai IKA bagi lembangan Sungai Paka adalah 72.4% dan boleh diklasifikasikan sebagai kelas II dengan status sedikit tercemar. Hasil kajian juga menunjukkan kumbahan daripada kilang kelapa sawit merupakan penyumbang utama kepada kemerosotan nilai IKA di kawasan kajian. Kata kunci: Indeks kualiti air (IKA); pencemaran; lembangan Sungai Paka ABSTRACT A study of the Water Quality Index (WQI) has been conducted at Paka River basin, Terengganu. It involved the measurements of dissolved oxygen, pH, biological oxygen demand, chemical oxygen demand, total suspended solids and ammonia at eight sampling stations. The results showed that all the sampling stations were in the clean status except for the two polluted stations situated at Rengat River and Rasau River. Nonetheless, the overall mean WQI value of Paka River basin was 72.4% and can be classified as class II with the status of slightly polluted. Results also showed that the effluents from oil-palm factories were the major contributor for deterioration of WQI values in the study area.
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