Gravity Dams :
The rigid dam which is constructed either with stone or brick masonry or mass concrete, is called a solid gravity dam. As solid gravity dams resist the overturning moments due to all external forces i.e. water pressure, silt pressure, etc. by its own weight only these are known as solid gravity dams.
Advantages:
1. They are suitable in steep valleys where earth dams tends to slip.
2. They don't fail easily, even if the tends to fail it can be predicted.
3. The surplus water can be discharged through the sluices provided.
4. These dams are strong in foundations and build to more height.
5. The sedimentation in the reservoir can be removed through the sluices.
6. The cost of maintenance is very less.
Disadvantages:
1. They require strong foundation.
2. Initial cost of construction is high.
3. Once dam is constructed it cannot be raised further.
4. For the supervision it requires a skilled labour.
The rigid dam which is constructed either with stone or brick masonry or mass concrete, is called a solid gravity dam. As solid gravity dams resist the overturning moments due to all external forces i.e. water pressure, silt pressure, etc. by its own weight only these are known as solid gravity dams.
Advantages:
1. They are suitable in steep valleys where earth dams tends to slip.
2. They don't fail easily, even if the tends to fail it can be predicted.
3. The surplus water can be discharged through the sluices provided.
4. These dams are strong in foundations and build to more height.
5. The sedimentation in the reservoir can be removed through the sluices.
6. The cost of maintenance is very less.
Disadvantages:
1. They require strong foundation.
2. Initial cost of construction is high.
3. Once dam is constructed it cannot be raised further.
4. For the supervision it requires a skilled labour.
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