天井川に関する二,三の水理学的特性

Abstract

This paper deals with the theoretical characteristics of the hydraulic features of flowsin a permeable channel like so-called Tenjo-river (which indicates the channel bottom is ex-tremely higher in elevation than the outside ground level). In open channel hydraulics, theflow in a permeable channel is classified as the flow with decreasing discharge in the direc-tion of running flow, so that the method of singular point in steady-state hydraulics will beused for the analysis.The results obtained by the mathematical analysis are indicated in connection with thehydraulic conditions imposed up- and dowostreams, and some engineering contributions tothe design for the river-improvement projects of Tenjo-rivers are also presented.