The exit gradient of the seepage of water through a soil medium is the
1] slope of the flow line
2] slope of the equipotential line
3] ratio of total head to the length of seepage
4] ratio of the head loss to the length of seepage
1] slope of the flow line
2] slope of the equipotential line
3] ratio of total head to the length of seepage
4] ratio of the head loss to the length of seepage