Sains Malaysiana 50(3)(2021): 645-654

http://doi.org/10.17576/jsm-2021-5003-07

Alternative Water Resources Quality Assessment during Flood Disaster in Kuala Krai, Kelantan, Malaysia

(Penilaian Kualiti Sumber Air Alternatif semasa Bencana Banjir di Kuala Krai, Kelantan, Malaysia)

KOH LIEW SEE*, NASIR NAYAN, MOHMADISA HASHIM, YAZID SALEH & HANIFAH MAHAT

Department of Geography and Environment, Faculty of Human Sciences, Universiti Pendidikan Sultan Idris, 35900 Tanjong Malim, Perak Darul Ridzuan, Malaysia

Received: 3 September 2018/Accepted: 9 August 2020

ABSTRACT

Quality assessment of water resources is important to ensure the well-being of residents, especially the victims who are affected by floods and having difficulties in obtaining clean water supply when the floods hit. This paper seeks to discuss the quality assessment of water resources in the district of Kuala Krai, Kelantan. Field methods were used to collect water samples during the northeast monsoon season in the month of December 2016/January 2017 involving six well stations, four flood water stations and four rainfall stations. The quality assessment of water resources involved six key parameters, namely DO, pH, BOD, COD, NH₃N and SS using the Water Quality Index (WQI) analysis. The results of the analysis showed that the WQI percentage of well and flood water stations accounted for 61.31 to 75.95% which is Class III of moderately contaminated status, except the T6 station that recorded 80.99% of WQI value which is Class II of good status. The findings also showed that all WQI values ​​from the rainwater stations were at 87.85 to 89.10%, which is Class II of good status. This condition explains that the rainwater resources have better quality than the well and flood water resources. With the help of this research, the flood manager's party can take systematic management measures in ensuring that flood victims receive water supplies during flood events. In this regard, infectious diseases resulted from the consumption of contaminated water among flood victims can be reduced.

Keywords: Flood water; rainwater; Water Quality Index; well water

ABSTRAK

Penilaian kualiti sumber air penting bagi memastikan kesejahteraan penduduk terpelihara terutama mangsa yang terkesan akibat banjir dan sukar memperoleh bekalan air bersih semasa bencana banjir melanda. Kertas ini bertujuan untuk membincangkan penilaian kualiti sumber air di Jajahan Kuala Krai, Kelantan. Kaedah lapangan digunakan untuk mengumpul sampel air semasa musim monsun timur laut pada bulan Disember 2016/Januari 2017 yang meliputi enam stesen air telaga, empat stesen air banjir dan empat stesen air hujan. Penilaian kualiti sumber air melibatkan enam parameter utama iaitu DO, pH, BOD, COD, NH₃N dan SS dengan menggunakan analisis Indeks Kualiti Air (IKA). Hasil analisis mendapati peratus IKA stesen air telaga dan air banjir berada pada nilai 61.31 hingga 75.95% iaitu pada Kelas III yang berstatus sederhana tercemar kecuali stesen T6 didapati mencatat nilai IKA 80.99% iaitu pada Kelas II yang berstatus baik. Keputusan juga menunjukkan kesemua nilai IKA stesen air hujan berada pada nilai 87.85 hingga 89.10% iaitu pada kelas II yang berstatus bersih. Keadaan ini menjelaskan bahawa sumber air hujan mempunyai kualiti yang lebih baik berbanding sumber air telaga dan sumber air banjir. Dengan adanya penyelidikan ini, pihak pengurus bencana banjir dapat mengambil langkah pengurusan yang sistematik dalam memastikan mangsa banjir memperoleh bekalan air semasa bencana banjir melanda. Sehubungan itu, penyakit berjangkit akibat penggunaan air tercemar dalam kalangan mangsa banjir dapat dikurangkan.

Kata kunci: Air banjir; air hujan; air telaga; Indeks Kualiti Air

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*Corresponding author; email: kohliewsee89@gmail.com