Study of physicochemical and microbiological quality of two north Moroccan hydrographic networks: Laou and Tahaddart [Étude de la qualité physicochimique et microbiologique de deux réseaux hydrographiques nord marocains: Laou et Tahaddart]
Errochdi S.,Laboratoire Diversite et Conservation des Systemes Biologiques |
El Alami M.,Laboratoire Diversite et Conservation des Systemes Biologiques |
Bennas N.,Laboratoire Diversite et Conservation des Systemes Biologiques |
Belqat B.,Laboratoire Diversite et Conservation des Systemes Biologiques |
And 2 more authors.
Mediterranee | Year: 2012
A total and thorough characterization of the physicochemical and microbiological quality of surface waters of the two hydrographic networks Laou and Tahaddart was carried out by the means of a follow-up which was spread out over three consecutive years (from April 2007 to July 2009). The total physicochemical and microbiological quality was evaluated starting from ten parameters which are: conductivity, dissolved oxygen, turbidity, ammonium, nitrites, nitrates, orthophosphates, the total coliforms, the fecal coliforms and the fecal streptocoques ones. This study shows that the rivers of these two basins slopes undergo multiple stresses and arrive at their tolerance level on some of their sections. On the level of the area catchment Laou, the quality of water is generally good with average on the level of the whole of the rivers prospected except some sections whose quality is bad because of the discharges of worn water without preliminary treatment, intensification of agriculture with the use of manure and plant health products as well as the inexistence of points of specific control to specific pollution. As for the area catchment Tahaddart, the quality of water is good with average on the level of the under-basin Haricha, while it is bad with very bad on the level of the two under-basins El Hachef and Mharhar. The problems of the quality of water on this basin lie in the nature of the substrate strongly erosive, agriculture and the nature ofhusbandries, the breeding and overgrazing.