Assessment of the Efficiency of a Pilot Constructed Wetland on the Remediation of Water Quality; Case Study of Litani River, Lebanon

The potential use of constructed wetlands to remediate polluted rivers is promising and has recently received a great deal of interest. This study aims at evaluatingthe efficiency of a constructed wetland of the Litani River in Lebanon using two types of aquatic plants, Phragmites australis and Sparganium erectum. Comparative analysis of the mean values of water quality parameters of the inflow and outflow water of the wetland system was conducted during the period of April 2014 and July 2015. Findings show statistically significant improvement in water quality parameters. Hence, results clearly show the efficiency of the constructed wetland in the remediation of the polluted river water and the important role of the aquatic macrophytes in remediation. In conclusion, the studied wetland provides an efficient sustainable approach towards the integrated river basin management of Litani River. Further comprehensive studies to better illustrate the role of aquatic plants in the remediation process are needed.