Effect of Treated Wastewater on Plant, Soil and Leachate for Golf Grass Irrigation
The main objective of this work is to evaluate the feasibility of the treated wastewater reuse from the Agadir M’zar plant for golf grass irrigation. The current potential of this water is 10,000 m3/day, which can be used for irrigation without any restriction (Category A, WHO standards). This production capacity of treated wastewater by the Agadir M’zar plant will permit to satisfy completely the needs in water for irrigating Agadir city’s green spaces. The purpose is to investigate the effects of the reuse of treated wastewater which contains higher concentration of soluble salts compared to groundwater on plant, soil and leachate. To do so, full-scale tests have been carried out in the wastewater plant site on parcels of 25 m2 using different variety of grass seed. The results presented in this chapter are related: firstly to the monitoring of parameters of grass growth during the first 21 days of irrigation; secondly to the monitoring of physicochemical parameters of leachate during the first 60 days of irrigation; and thirdly to the analysis of soil in three depths (20 cm, 40 cm and 60 cm) for composite samples taken at the end of the process. The parameters of grass growth and the physicochemical analysis of leachate and soil show that irrigation with treated wastewater in comparison with conventional water (groundwater) has a positive effect on the grass growth (tillering and evolution of leave length) and increases salinity in both groundwater and the top soil, thus tending to promote the training of soluble salts insoil.
KeywordsWastewater reuse Golf grass Irrigation Plant Leachate Soil Salinity
Our thanks go to RAMSA, Regional Office of Agricultural Development of the Souss Massa Daraa, National Institute of Agronomic Research of Agadir, and the Water and Chemistry Laboratory in Franche Comté University in Besançon town in France for their assistance during the conduct of this study.
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