Correct option is C
When analyzing a
gravity dam under
empty reservoir conditions, the only force acting on the dam is its
self-weight. Here's why the other forces do not apply:
1.
Self-weight:
· This is the weight of the dam itself, which acts vertically downward due to gravity. It is the primary stabilizing force resisting overturning and sliding.
2.
Uplift Pressure:
· Uplift pressure acts at the base of the dam due to water seeping through or under the foundation. However, in
empty reservoir conditions, there is no water, so
uplift pressure is absent.
3.
Water Pressure:
· Water pressure acts horizontally on the upstream face of the dam. Since the reservoir is empty, there is
no water pressure acting on the dam.
4.
Wave Pressure:
· Wave pressure occurs due to waves generated in the reservoir. With an empty reservoir,
wave pressure is nonexistent.
