Feyisa et al.( 2014) introduced a new automated water extraction index (AWEI) improving the classification accuracy in areas that include shadow and dark surfaces. The index includes two indices: AWEInsh and AWEIsh. They are a linear combination of the blue (band 1), green (band2), NIR (band4), SWIR 1 (band 5), and SWIR 2 (band 6) bands of Landsat TM. AWEInsh is mainly used in areas with an urban background, while AWEIsh is primarily designed to remove shadow pixels.