rivers (QBR) is presented and its performance in three rivers is tested. The index ranges
between 0 and 100 and the final score is obtained through the addition of the scores of four
attributes: 1) total cover of riparian vegetation, 2) the structure, 3) the complexity and
naturally and 4) the degree of river channel alteration. An application of the index to three
Mediterranean basins is presented (rivers Besos, Llobregat and Foix) with 64 sampling …