construction simplicity and cost as selection criteria between two types of constructed wetlands treating highway runoff.two free water surface (fws) and two subsurface flow (ssf) pilot-size wetlands were constructed for the evaluation of their performance in treating highway runoff (hro) in the heart of the mediterranean region, the island of crete, at the southernmost point of greece. detailed recordings of the resources involved during the construction allowed a thorough calculation of the cost of the systems and the requirements in materials, man-hours, and equipment. the two identical fws systems had a surfac ...200919225727
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