Abstract
This study presents a GIS/Remote sensing-aided procedure to monitor urban lake area change in Wuhan city, which grew rapidly in the 1990s. Four time-series Landsat images, the year of 1991, 1995, 2000 and 2002, were used here. Lake’s border maps were made by NDWI(Normalized Difference Water Index) index and IILI(index of lake loss intensity) of 27 lakes were calculated for analysis. The results showed that the total areas of lakes in the urban area decreased up to 38.67km2 from 1991 to 2002. The temporal and spatial distribution of lake loss was affected by several factors such as city construction, transportation construction, policy guide etc. The urban lake can be well protected after changing into lake park. The present study suggested that legislation and lake planning were two approaches for urban lake protection.
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