Abstract
The performance of newly developed water retentive pavement was tested in field experiments. For the evaluation of water holding ability, on site estimation methods of evaporation efficiency was developed in this study. At first, convective mass transfer coefficient at experimental site was measured by evaporation rate from a filter paper test piece on the ground near pavement sample. Next, using analogy between mass transfer and heat transfer, sensitive heat flux at pavement surface was calculated using convective heat transfer coefficient. Finally, evaporation rate at pavement surface was estimated as a residual of surface heat budget.
