| Summary: | Increase of socio-economic activities in the urban area has led to many water scarcity problems. Thus, the need to investigate the current state of Langat river is increasing. An integrative computational model, ArcSWAT with GIS interface was being used to predict daily stream flow of the study area. Historical data from years 1999 to 2010 was used for modeling purposes. The results reviewed that the calibrated model is able to simulate the flow for the river basin successfully with the R2 = 0.64 and Nash-Sutcliffe Index, NSI= 0.64. The results proved that GIS technology and ArcSWAT model is capable for simulating the stream flow in the Langat river basin and can be applied for other river basins. This shows that SWAT can be a tool for a hydrologic modeling in Malaysia in the future. © (2014) Trans Tech Publications, Switzerland.
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