Abstract
This paper addresses the analysis of a wide channel subject to seepage and evaporation losses, the channel being excavated in a permeable soil underlain by a highly permeable aquifer of low piezometric head. The authors present two equations, one for estimating the channel discharge at a general channel section and one for estimating the total length of the channel. The channel length equation is modified to calculate the hydraulic conductivity of the top soil. Finally, two numerical examples are given to show how to use the equations. Key words: channel length, wide channel, seepage, evaporation.