Analysis of a Masonry Dam:

Figure shows a masonry dam of trapezoidal cross section ABCD with water face BC vertical. The top width of the dam is 'a' and its base width 'b' (b > a). The height of the dam is H, and the density of the material of the dam (masonry) is ρ. Let the height of water retained be 'h' (which is less than H, due to the free-board kept over reservoir water level).

(i)  Pressure distribution due to vertical load

(ii)  Pressure distribution due to moment W. e

(iii) Pressure distribution because of water pressure P

Figure: Pressure Distribution below Dam Base