Effect of sudden rise of water in stream on adjacent land

الملخص EN

This study uses both laboratory and mathematical models to compute water table through an embankment cross section due to sudden rise in stream flow level.

the main aim for current study to proof whether a one-dimensional 1d mathematical model can capture the phreatic line through embankment.

for this purpose four different identical laboratory sand homogeneous embankment models are constructed in a plywood box by using different sand particle sizes 2mm, 1mm, 0.5mm and 0.25mm to represent very coarse, coarse, medium and fine sand respectively.

experiments are conducted on each model by fixing the upstream water depth to 0.75m; in order steady state in water table prevail.

the water table level is measured at different sections inside the model body at the steady state flow condition.

the time required to achieve the steady state condition in each model is also recorded.

for the mathematical model, the Darcy equation is solved considering the flow in one dimension through the embankment model.

then, the mathematical model is verified against the experimental and numerical results available in the literature.

the comparisons show well agreement between the computed results of the mathematical model and the corresponding observed results gathered from the experimental and numerical models.

the mathematical model derived in this study can be readily applied to predict water level in porous media of infinite length.