| Summary: | The power of Geographic Information
System (GIS) has been demonstrated in many previous
study in various field of study. In this study GIS was
integrated with watershed model known as Soil and
Water Assessment Tools (SWAI) to model the stream
flow of the Sembrong River, Malaysia. In this study
the main objective of this study to test the applicability
of SWAT in modeling the stream flow in selected study
area. Several required parameters are needed to run the
model which are meteorological data, land use, soil
type, and topography maps. Through the processing
the sub-basin was generated that consist of unique
value to increase the performance of results. Then, the
model was calibrated and validated to ensure that the
generated result is acceptable. The calibration and validation
based on the 12 was used as the main reference
to validate the model. Based on the 12 value, the value
is more than 90%o which is 0.9161 that conclude that
the result is acceptable and reliable. Overall, reviewing
the results it seems that overestimate and underestimate
values are within the acceptable range. As a conclusion,
the simulated stream flow was within the acceptable
for the Sembrong watershed and this model is
suitable to be used as a platform to predict the future
changes.
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