Martin et al. (2010) found that the application
of the EPI-D diatom index is recommended because of its
inherent advantages. An important reason for the failure of the
application of these diatomic indices is the great differences
between the species pool present in the area of study with
regions where these indices developed. Between more than
one hundred of species recorded in the area of study, only
27, 51 and 67 of the species pool of IDP, TDI and EPI-D were
matched with the species of Ismailia Canal and its branches