4. USES OF DAM :
•Flood Mitigation
•Irrigation
•Water Supply
•Navigation
•Fishery and wild life Preservation
•Hydro-electric Power Generation
5. CLASSIFICATION OF DAMS
On Basis of materials used
-Rigid Dams
-Non-rigid Dams
On basis of purpose of construction
-Storage Dams
-Diversion Dams
-Detention Dams
-Overflow Dams
-Industrial Dams
6. On basis of structural design:
-Earth fill Dams
-Embankment Dams
-Gravity Dams
-Concrete Arch Dams
-Buttress Dams
8. Factors to be considered for dam
construction:
•Geological conditions
-effect the location and construction of the
foundations
• rainfall and storage reservoir characteristics
of the proposed dam catchment
9. •local availability of earth and rock materials
and their suitability for dam construction
•planning for river diversion to occur while
the dam is being constructed
10. •an Environmental Impact Study
-noise and dust hazards in
construction
-effects of the dam on the regional
micro-climate
11. Adverse effects of dams :
•Displacement of farmers and village
people
•Do not give benefits that are
profitable, when compared to cost
•Affects aquatic life
•Due to stagnant water, breeding of
mosquitoes takes place.
12. Case Study of Maphou Dam Project
Effects w.r.t Maphou Village
-Back ground of the project
-Effects of it
13. Failure of dams :
1.Overtopping
-Insufficient spillway capacity
-Extreme flood exceeding design criteria
2.Quality Problems
-Piping in dam body,foundation,spillway
3. Poor Construction
16. Future of dams :
-Due to increase in demand of
hydro-electric power, the dams play
a major role in producing it
-In order to meet the demand of
surplus growth of population needs
like food and water, dams has to be
built in the developing countries.
