Repas lama dam water quality and heavy metal contamination using Qual2k

Abstract Repas Lama Dam in Bentong Pahang has been experiencing pollution by Non-Point Sources (NPS) that can be found upstream of the Sungai Repas, being so evident discoloration water is observable at location. The area littered with mines active and inactive, many inactive improperly shut down. When there are mining activities, some major waste or tailings produced as by-products process which drastically increases amount a body runs through these areas will contain. Water Quality Parameters location, whether biological, chemical, physical, give lot insight into level body. Through collecting parameters running them quality model, it information on present state river help attaining predictions health river. QUAL2K model was used to analyse Old further make after 10 years. After modelling process, heavy metals were analyzed using Malaysian National Standard (NWQS), also assisted classifying based off individual its overall Index score. for this study Biochemical Oxygen Demand (BOD), Chemical (COD), Dissolved (DO), Ammonia Nitrogen, pH Total Suspended Solids (TSS). In terms metal analysis, looked Arsenic (As), Lead (Pb), Zinc (Zn), Copper (Cu), Tin (Sn) Aluminium (Al). data collected from studies conducted site 2021 given Department Statistics Malaysia.