Dear reader dams are of two types; namely homogeneous and zone dam. We will discuss details about definition, objective, performance and failure case studies of both dams in our upcoming post. For this post we like to include that a homogeneous dam is completely constructed of identical materials.
At first we will discuss about homogeneous dam. We know homogeneous dam consists of homogeneous material which leads to even distribution of erosive force generated by seeping water. But while we are speaking about homogeneous, the degree of homogeneity also has to consider. Say materials may be same type but the compaction control may not be same.
Thus though material is identical but homogeneity is not achieved both in embankment and embankment foundation. This consideration came from practical experiences, as for large dam the compaction control and as well material uniformity are very difficult.
As a uniform media of seepage can’t be furnished both in embankment and its foundation, flow established is not also uniform. This results concentration of seepage force and as usual they make their way through weakest portion and piping phenomena progressive.
Dear reader in the next part we will learn about backward erosion process within embankment. Please stay with us.