The evaluation of morphometric analysis was conducted in upstream Sungai Batu catchment with
the total area 24.40 km2. The GIS application used as a tool to generate drainage network from
ASTER Global Digital Elevation Model (30m) and obtains reliable information of linear, areal
and relief morphometric parameters towards the hydrological responses. Results show that the
study area is 4th order catchment having 99 total streams, indicate the lower stream order. The
study area is having elongated shape with high permeability surface, high infiltration rates and
moderate surface runoff. The moderate runoff condition is highly associated with lower erosion
and sediment transport capacities and tend to form a floods diminution due to the flow from
tributaries into the main stream which require greatest basin lag time to peak discharge. The
GIS application in morphometric study is very efficient tool for better understanding in terms of
the several morphometric parameters and terrain parameters such a surface runoff, capacity of
infiltration and lithology which are valuable and act as a guidance for decision makers to make
sustainable development in watershed planning, management and mitigation measure control.
Keywords
Digital elevation model; GIS; Morphometric analysis; Watershed management
ENIVRONMENT ASIA
Published by : Thai Society of Higher Education Institutes on Environment Contributions welcome at : http://www.tshe.org/en/
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