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Topic I.10. Service Reservoirs: Kinds, Structures and Volume

Topic I.10. Service Reservoirs: Kinds, Structures and Volume. Main Functions of the Service Reservoirs: To insure the necessary head at the water distribution network (reservoir elevation) To insure the balance between water inflow and outflow (reservoir useful storage volume)

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Topic I.10. Service Reservoirs: Kinds, Structures and Volume

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  1. Topic I.10. Service Reservoirs:Kinds, Structures and Volume Main Functions of the Service Reservoirs: • To insure the necessary head at the water distribution network (reservoir elevation) • To insure the balance between water inflow and outflow (reservoir useful storage volume) • To keep the fire water volume (if necessary) Kinds of Service Reservoirs I.According to their location and technological function • Crossover type • Endmost type • Intermediate type

  2. Crossover Type Kinds of Service Reservoirs

  3. Endmost Type Kinds of Service Reservoirs

  4. Intermediate Type Kinds of Service Reservoirs

  5. Kinds of Service Reservoirs II. According to their structure • Sunken type (dig into the earth) • Elevated (Tower) type • Standpipe (Column) type III. According to their protection • Open • Covered

  6. Sunken Type Shapes (schemes) 1 - water inflow pipe 2 - water outflow (feeding) pipe Kinds and Structures of Service Reservoirs

  7. Pipe Systems at the Sunken Type Service Reservoirs a - inflow pipe system б - outflow (feeding) pipe system b - overflow and drainage pipe system Kinds and Structures of Service Reservoirs

  8. Sunken Type Structure (Plane) Kinds and Structures of Service Reservoirs

  9. Sunken Type Structure (Longitudinal Section) Kinds and Structures of Service Reservoirs

  10. Sunken Type Structure (Cross Section) Kinds and Structures of Service Reservoirs

  11. Kinds and Structures of Service ReservoirsElevated (Tower) Type Standpipe (Column) Type

  12. Kinds and Structures of Service Reservoirs

  13. V = Vr + Vf , m3 V - total reservoir volume, m3 Vr - regulation (useful) reservoir volume, m3 Vf - fire water reserve volume, m3 Vf= 3,6.Qf.Tf, m3 Qf - fire water flowrate, l/s Tf - fire duration, h; Tf = 2 - 3 h Determination of the Regulation Reservoir Volume I. With known water inflow/outflow regimes Vr = 1,2.(V1 + V2) I. With unknown water inflow/outflow regimes Vr = (0,3 - 0,5).Qmax,d Qmax,d- daily maximal water consumption, m3 Service Reservoir Volume Sizing

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