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Part B1: Basics B1.2 Reservoirs

B1.2 Reservoirs Topics. Why store?Raise head, smooth flow, conflicts and trade offsDetermination of reservoir volume/heightMass curve approach, simulation approachDam designForces on a dam, Types of dam, Seepage, SpillwaysTechnical problems with dams Silting, failureSocial impact of damsSe

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Part B1: Basics B1.2 Reservoirs

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    2. B1.2 Reservoirs Topics Why store? Raise head, smooth flow, conflicts and trade offs Determination of reservoir volume/height Mass curve approach, simulation approach Dam design Forces on a dam, Types of dam, Seepage, Spillways Technical problems with dams Silting, failure Social impact of dams Seminars (Monday W6)

    3. B1.2 Reservoirs Seminars: Monday 17/1, 16:00

    4. B1.2 Reservoirs Seminar groups

    5. B1.2.1 Reservoirs Why store Raise head Hydro power Allow greater flow to irrigation Smooth flow Reliable Hydro power Off season irrigation Flood control Domestic Water supply Other reasons Fishing Leisure

    6. B1.2.1 Reservoirs Why store: Conflicts Maximising head vs. Maximising storage If the storage is used, the head is reduced Water use vs. flood control Water use prefers a full reservoir (for use later) Flood control the reservoir should be empty (so floodwater can fill it)

    7. B1.2.1 Reservoirs Why store: The anatomy of a reservoir

    8. B1.2.2 Reservoirs How much to store

    9. B1.2.2 Reservoirs How much to store

    10. B1.2.2 Reservoirs How much to store: Mass curve

    11. B1.2.3 Reservoirs Dam design: Forces on a dam

    12. B1.2.3 Reservoirs Dam design: Types of dam

    13. B1.2.3 Reservoirs Dam design: Seepage: Flow nets

    14. B1.2.3 Reservoirs Dam design: Seepage: Typical flow nets

    15. B1.2.3 Reservoirs Dam design: Seepage: Typical flow nets: Earth dams

    16. B1.2.3 Reservoirs Dam design: Seepage: Zoned earth dams: piping

    17. B1.2.3 Reservoirs Dam design: Seepage: Earth dams

    18. B1.2.3 Reservoirs Dam design: Seepage: Earth dams: Zoned

    19. B1.2.3 Reservoirs Dam design: Seepage: Zoned earth dams

    20. B1.2.3 Reservoirs Dam design: Seepage: Zoned earth dams

    21. B1.2.3 Reservoirs Dam design: Seepage: Zoned earth dams

    22. B1.2.3 Reservoirs Dam design: Spillways: Types

    23. B1.2.3 Reservoirs Dam design: Spillways: Side channel

    24. B1.2.3 Reservoirs Dam design: Spillways: Chute spillways

    25. B1.2.3 Reservoirs Dam design: Spillways: Shaft spillways

    26. B1.2.3 Reservoirs Dam design: Spillways: Ogee spillways

    27. B1.2.3 Reservoirs Dam design: Spillways: Ogee spillways

    28. B1.2.3 Reservoirs Dam design: Spillways: Hydraulic jump

    29. B1.2.3 Reservoirs Dam design: Spillways: Hydraulic jump

    30. B1.2.3 Reservoirs Dam design: Spillways: Hydraulic jump Manning's equation

    31. B1.2.3 Reservoirs Dam design: Spillways: Hydraulic jump Bernoulli's equation

    32. B1.2.3 Reservoirs Dam design: Spillways: Hydraulic jump: Sums: Critical depth

    33. B1.2.3 Reservoirs Dam design: Spillways: Hydraulic jump: Sums: Head loss

    34. B1.2.3 Reservoirs Dam design: Spillways: Hydraulic jump: Sums: Height of the jump

    35. B1.2.3 Reservoirs Dam design: Spillways: Hydraulic jump: Location of the hydraulic jump

    36. B1.2.3 Reservoirs Dam design: Spillways: Encouraging a jump

    37. B1.2.4 Reservoirs Technical problems with dams: Silting

    38. B1.2.4 Reservoirs Technical problems with dams: Silting

    39. B1.2.4 Reservoirs Technical problems with dams: Failure modes

    40. B1.2.4 Reservoirs Technical problems with dams: Failure: St Francis breach

    41. B1.2.4 Reservoirs Technical problems with dams: Failure: St Francis breach

    42. B1.2.4 Reservoirs Technical problems with dams: Failure: Piping - Hellhole dam

    43. B1.2.4 Reservoirs Technical problems with dams: Failure: San Luis Dam Slide

    44. B1.2.4 Reservoirs Technical problems with dams: Failure: Fatehgarh dam earthquake damage

    45. B1.2.4 Reservoirs Technical problems with dams: Failure: Vaiont dam bank slip

    46. B1.2.5 Reservoirs Social impact of dams

    47. B1.2 Reservoirs Summary Storage needs may conflict Mass balance and the mass curve are useful ways to size reservoirs Seepage is an issue with earth dams but can be dealt with by zoning There are several varieties of spillway, including side channel, chute, shaft, syphon, and ogee Hydraulic jump is a useful technique to reduce spillwater levels Dams can fail by silting, overtopping, foundation failure wave action, erosion and lack of maintenance Dams can have social and environmental impacts

    48. B1.3 Next…..Water conveyance

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