Abstract
The procedure to find a proper opening dimension for the selective intakes based upon Hino-Onishi's selective withdrawal theory for axisymmetric flow in continuously stratified fluid is modified by the experimental procedure and applied to the withdrawal from reservoir surface layer which consists of a top layer of approximately homogeneous density and a thermocline layer which is located under the top layer and is continuously stratified. The critical values of the modified densimetric Froude number calculated for withdrawal from reservoir surface layer are graphically compared to the values obtained through Kawahara's formulas and Kawai-Matsumoto's model experiments for withdrawal from a two-layered fluid. A method to estimate the withdrawal efficiency of warm water in the top layer is presented.
