"SWAT Application For Hydrologic and Water Quality Modeling For Suspended Sediments: A Case Study of Sungai Langat's Catchment in Selangor"

Abstract

High annual rainfall in Malaysia does not solve water scarcity problems especially in urban area particularly in Sg. Langat Basin. It’s due to the increases of socio-economic activities in the surrounding area and consequently, Sungai Langat water quality especially in the downstream area become deteriorate. An integrative computational methodology is developed for the management of nonpoint source pollution from catchments. The associated decision support system is based on an interface such as GIS and a comprehensive catchments simulation model such as AVSWAT-X which is formerly known as SWAT. For Sungai Langat Catchment’s study, the project model was developed using AVSWAT-X to predict daily stream flow and suspended sediments (SS) in the study area. Historical data for years 1997, 2001 and 2003 is used for comparison with simulated results from the model. The results reviewed that the calibrated model is able to simulate the flow and SS for the river basin successfully.