A study of water quality for Sungai Perlis during high tide and low tide

Abstract

Sungai Perlis is the main river in Perlis with lenght is approximately 9.55km from Kangar city to Kuala Perlis before discharged to the sea. The size of the Sungai Perlis basin is approximately 310km2. The objective of this study are to establish the pollutants profile along Sungai Perlis during high tide and low tide based on physical, chemicals and biological parameter. The analysis involved in-situ measurement (ph) and laboratory analysis (SS, BOD, COD, AN AND E-Coli). During the high tide, the high concentration of pollutants load for pH is 7.77, SS is 128 mg/l, BOD is 4.5 mg/l, COD is 35.2 mg/l, AN is 1.28 mg/l and E-Coli is 1011.2 MPN/100ml. During low tide the high concentration of pollutant load for pH is 6.96, SS is 228 mg/, BOD is 8.6 mg/l, COD is 56.5 mg/l, AN is 1.58 mg/l, and E-Coli is 1011.2 MPN/100ml. Along Sungai Perlis, there are residental area, agriculture area, recreational park and squatters located at Kuala Perlis, agriculture ponds and Kangar wet market which are directly and indirectly affect the water quality of Sungai Perlis during high tide and low tide.