This paper reports first result of absorption tests for the evaluation of the permeability of two constructed wetland plants built up near Putignano (BA) for the treatment of local wastewater municipal treatment plant effluent. These fields were planted with phragmites australis hydrophytes and covers an area of approx. 2,000 m2. They have been designed with Kickuth Root-Zone Method. The assessment of the operational parameters of the system - hydraulic conductivity (permeability) in particular is very useful to obtain good design criteria - is quite difficult for the presence of coarse grained gravels mixed with rhizomes, for the influence of evapotranspiration and because of the different conditions of phragmites during the year. To the aim of better understanding the hydraulic of the system a in situ tests program has been planned. In this paper are reported first results concerning in situ measurement of permeability in the plants by Guelph permeameter. These preliminary results are in good agreement with the expected values on the basis of which the design of the plants have been developed.
|Titolo:||Evaluation of hydraulic conductivity in a phragmites wastewater treatment plant|
|Data di pubblicazione:||2001|
|Nome del convegno:||Sixth International Conference on the Modelling, Monitoring and management of Water Pollution|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|