ABSTRACT
Practically all storage dam projects require some form of seepage control. Such measures are particularly relevant with embankment dams on alluvial foundations because most alluvial deposits are stratified and heterogeneous with highly pervious strata. For such conditions the reasons for seepage control are mainly twofold:
To ensure stability of the downstream portion of the dam by preventing excessive uplift pressures and possible piping phenomena which may lead to failure of the dam,
To prevent excessive losses of water, which may jeopardize the economic viability of the dam project.
