Bourazanis G.,Prefecture of Laconia |
Londra P.,Agricultural University of Athens |
Kargas G.,Agricultural University of Athens |
Argyrokastritis I.,Agricultural University of Athens |
Kerkides P.,Agricultural University of Athens
Archives of Agronomy and Soil Science | Year: 2015
Two experimental procedures were used to determine both hydraulic properties, soil water retention θ(h) curve and unsaturated hydraulic conductivity K(θ), of a sand sample. Knowledge of hydraulic properties is essential, since they generally control soil water dynamics. A steady-state laboratory method was used for the simultaneous determination of θ(h) and K(θ). A one-step outflow method was used for the determination of diffusivity D(θ) and subsequently K(θ) from soil water retention data which were measured independently on the same sample and using the same apparatus. The comparison of K(θ) measured values from the above-mentioned methods showed very good agreement of the results. Also, the comparison between the experimental K(θ) and θ(h) functions and the predictions obtained using retention curve (RETC) code by simultaneous fit of experimental soil water retention and hydraulic conductivity data from outflow data, assuming the Mualem-van Genuchten model, showed very good agreement. It is noted that the main disadvantage of the one-step outflow method is the weakness to predict K(θ) values near saturation. This disadvantage could be overcome using RETC code with the above procedures, since the K(θ) values between the predictive approach and the steady-state method were similar. © 2015 Taylor & Francis
Demetropoulou L.,Technical University of Crete |
Nikolaidis N.,Technical University of Crete |
Papadoulakis V.,Prefecture of Laconia |
Tsakiris K.,National Center for Social Research |
And 5 more authors.
Environmental Policy and Governance | Year: 2010
Accepting the positive results that public participation can bring in the implementation of the Water Framework Directive (WFD), this paper seeks to contribute to ongoing discussions on the rather problematic WFD implementation in southern Europe. Within this framework, we first focus on the national level and the analysis of 'water governance' and 'public participation' within the context of WFD implementation in Greece, and secondly on the examination of the participatory methods introduced locally for the preparation of the Evrotas River Basin management plan. The first section focuses on public participation as an indispensable ingredient of good water governance. The next focuses on the introduction of the WFD as an instance of governance that promotes participatory arrangements. We then present the centralized structure of the Greek state as an impediment to the introduction of public participation in water governance. The fourth section focuses on the Evrotas River Basin and describes the participatory arrangements for the preparation of the management plan. The paper concludes with the verification of the need for participatory processes to respect the context within which they are pursued and with specific alterations to the way public participation has been planned and implemented in Greece. © 2010 John Wiley & Sons, Ltd and ERP Environment.