The EPI-D classified the canal and its branches in the good
water quality which did not match with the real state or the
chemical data. EPI-D index had non-significant partial correlation
with electrical conductivity and TDS, whereas it had
no correlation with NO3, NH4 and PO4 (Table 5). However,
EPI-D has given extremely good results in Italian Mediterranean
Rivers (Dell’Uomo et al., 1999 and Torrisi and
Dell’Uomo, 2006).