MODIFICATION OF THE CASAGRANDE'S EQUATION OF PHREATIC LINE

The purpose of the present paper is to carry out t he seepage analysis for a model to derive the equation of the phreatic line experimentally an d thereafter proposing the best solution to trace t he line. Sandy silt is used as a base material for this case. Phreatic Line for the model is plotted by carrying out 3 iterations each for two cases, that is, earthen dam without filter and with filter. Their corresponding phreatic line curves are traced on the butter paper on one of the longer side of the model. Plastic channel sections are used to contain the model sealing it air tight with the use of m- seal and rubber stoppers. Further, the traced curve s are compared with the Analytical solution of Casagrande