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Sains Malaysiana 38(2): 125-131 (2009)
Kajian Indeks Kualiti Air di Lembangan Sungai Paka, Terengganu
(Water Quality Index in Paka River Basin, Terengganu)
Suhaimi Suratman & Norhayati Mohd Tahir Kumpulan Penyelidikan Alam Sekitar (ERG) Jabatan Sains Kimia, Fakulti Sains dan Teknologi Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia
Mohamad Awang & Loh Ai Ling Kumpulan Penyelidikan Alam Sekitar (ERG) Jabatan Sains Kimia, Fakulti Sains dan Teknologi Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, MAlaysia
Diserahkan: 23 Mei 2008 /
Diterima: 21 Julai 2008
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; lembangan Sungai Paka;
pencemaran
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.
Keywords: Paka
River basin ; pollution; Water Quality
Index
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