Dams are classified based on their use, material, and size. The three main types are storage dams, diversion dams, and hydroelectric dams. Storage dams create reservoirs and are the most common type for water storage. Diversion dams raise water levels to divert water into conveyance systems. Infrastructure for water resources includes dams, barrages, weirs, canals, canal regulation works, and cross drainage works. Hydroelectric power plants have components like intake structures, penstocks, power houses with turbines, and tailraces.

6. Power House Long Distance Power Lines Turbine Intake Sluice gates Spillways River River Reservoir

9. Dam Population in India India ranks third in the world in dam population, after China and USA Indian Register of Large Dams available here: http://cwc.gov.in

10. Large Dams – state wise Total=5100

11. Large Dams – height wise

14. Concrete Dam-a typical section Heel Gallery Toe Spillway (inside dam) Crest Full Reservoir Level Free board Under sluice Upstream Down stream River Flow Foundation Level

16. Earthen Dam Generally built of locally available natural materials with minimum processing. Most common and the first kind of dam to be built have gentle side slopes and hence a wide base. F.R.L. PITCHING AXIS OF DAM TURFING ROCK TOE GROUT CURTAIN CUT OFF TRENCH M.D.D.L. SEMI PERVIOUS SEMI PERVIOUS

17. Typical section of an earth-core rockfill dam using a central core Impervious membrane Concrete, asphaltic concrete, steel, impervious soil

19. SIDE CHANNEL & CHUTE SPILLWAY ARRANGEMENT Channel Rest Channel Rough Chute Chute Blocks Dentated Sills Stilling Basin

21. WITHOUT FALLING SHUTTERS POND LEVEL POND LEVEL MASONRY FLOW FLOW Weir

23. AXIS OF BARRAGE GATE ROAD BRIDGE POND LEVEL PEIR D/S SHEET PILE R.C.C.RAFT U/S SHEET PILE Section of a Barrage FLOW STOP LOG GROOVE

30. A typical Hydro power Scheme POWER HOUSE COMPLEX ELECTRICITY TO THE GRID

31. An schematic description of Hydropower Plant