Abstract
Monitoring water resource changes is essential in water resources management and in flood or drought prevention. This research aims to monitor water resource changes using the multi-temporal Landsat imagery taken in December 2006 and 2014 through the following steps. First, the multiple NDWI (Normalized Difference Water Index) images are generated from the Landsat images. Next, multiple water resources such as the Nakdong River and the Dalchang reservoir are extracted from each NDWI image. Finally, the areas of the Nakdong River and the Dalchang reservoir in each NDWI image are measured to assess the water resource changes in the study area. The statistical results show that the Nakdong River had significantly increased its water storage capacity between 2006 and 2014, while the Dalchang reservoir had the constant area during the same period.
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