Q$6($a$)$ Draw sections through the following two types of homogenous earthen embankment dams having a:

$($a$)$ rock toe; $($b$)$ chimney drain together with horizontal drainage blanket. Indicate the profile of the seepage line $($that is$,$ the phreatic line$)$ for each case. $(2**4)$

Q$6($b$)$ Draw sections through the following types of embankment dams $($b$)$ Zoned, with clay core, chimney drain and horizontal drainage blanket; $($d$)$ Zoned with rock$-$fill. $(2*4)$

Q$6($c$)$ State the importance and function of transition filter in an earthen embankment dam. Sketch the section through a homogenous earthen embankment dam having a horizontal drainage blanket and indicate the location of the transition filters. $(4)$