Publication: Assessing putat river water quality using one dimensional river system model and total maximum daily load method
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Date
2023-08-01
Authors
Nurlailah Binti Abdillah
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Abstract
Putat River is one of Melaka River’s main tributaries and the most polluted tributary, especially for biochemical oxygen demand (BOD) and ammonia nitrogen (NH3-N). Currently, there is no comprehensive technique to monitor and assess the water quality of Putat River that considers the effects of pollutant loading within the catchment. This study identified the current status of Putat River water quality as well as the main contributors to the deterioration of water quality. This study also introduced water quality modelling and Total Maximum Daily Load (TMDL) analysis as a pollution control mechanism and water quality management of Putat River. The research methodology involved the water quality assessment based on the relationship between the river’s carrying capacity and the contribution of pollution sources through the application of a developed integrated one-dimension (1D) numerical model and TMDL analysis. As a result, the water quality of Putat River was polluted, especially in the downstream part. Through modelling, scenario 11 was selected in TMDL analysis, where the targeted BOD concentration, 3 mg/L in class IIA, was achieved through a 70-90% reduction of the main contributors of point and non-point sources of pollution. The maximum daily load and load allocation obtained from this study could be used to guide the TMDL implementation plan.