Abstract
Selective intake facilities are equipped on many dams for water quality management, by which the water can be taken selectively from the required layer of water quality. In the past intake form of opening and closing of gate valve, the frequent maintenance and repair works make it complicated for the dam management. In this study, a GATELESS intake structure of multi-hole type is researched from the viewpoint of easy maintenance. In stead of the intake gate, the air valves by supplying/exhausing compression of the air is developed and the technological consideration is carried out with this intake structure.
