Water quality of a recent lake reservoir in a semi-arid climate; Yacoub El Mansour (Morocco)

Abstract

A spatiotemporal study of the water physico-chemical quality was realized on the reservoir Yacoub El Mansour, located in the Province of El Haouz, on the N'fis River, 65 km South of Marrakesh. According to the bi-monthly sampling at the station 'dam' at different depths (0, -1, -2.5, -5, -10, -15, -19.5m, 1m of the bottom and the bottom), using a Van Dorn bottle, and on two littoral stations located at the entrance of reservoir. The trophic level of the reservoir lake was examined using enriching nutrient (phosphorus), transparency of water and chlorophyll a. The data related to these indicators during this study helped to establish the trophic level of the reservoir lake.

Keywords: trophic level; Reservoir Lake; physico-chemical quality.