The Award of the Japanese Society of Fisheries Engineering 2007 was given for the comprehensive study on hydraulics of coastal fishing grounds. This study is made up of three parts, which are the characteristics of variability of bottom layer fiow in coastal sea area, the environmental conservation of coastal tidal lagoon and the characteristics of the flow in stratified bay. The first is for the establishment of design guideline of estimation of bottom current for the structures on sea bottom such as artificial fish reefs. The second is to make rough estimation of material balance and to establish the conceptual framework of material circulation model in Lake Saroma. The third is for the estimation of flow pattern and seawater exchange by internal tide in Gokasho bay. In this paper, the purpose, means, results and outcomes of the study are outlined.
