Résumé:
This study is a phytoecological analysis of the vegetation which develop on the
Boumerzoug wadi banks, tributary of the Rhumel wadi. The physico-chemical
characterization of the studied grounds shows a certain homogeneity between the latter, for
the whole of the physico-chemical variables, except for texture. However, determination of
contamination/pollution indices (C/p) revealed a slight to severe contamination, for lead and
chromium, and moderated to very severe, for copper ; a contamination moderated to slight
pollution, for zinc, and a slight pollution to severe for cadmium. This pollution by cadmium
seems to be related as well to the urban and industrial waste as to the farming practices of the
exploitations which border the wadi.
The study of the vegetation of the Boumerzoug wadi banks showed that the
distribution ot the plant species is influenced oy the texture of the soil and the ecological
(factors, such as the raising of the banks, the distance of banks and the overgrazing.
Thus, the wooded and shrubby formations extends preferably on the backs banks of
the wadis, seldom flooded and most stable. The grazed pools settle as well on the borders as
far from banks of the wadi, but they differ from one another in the pasture intensity which
they undergo.
