1 I. Water Supply Networks and Facilities Topic I.4. River Water Intakes: Kinds and Structures Water Intake Kinds General classification: I. According to the location in respect to the river §Bank’s - at the river bank ( at the middle and low river reaches) §Stream’s - at the river stream §Mountainous - at the upper river reaches II. According to the capacity §Small - less than 1 m 3 /s §Average m 3 /s §Big - more than 6 m 3 /s

2 Topic I.4. River Water Intakes: Kind and Structure III. According to the lay-out §With separate arrangement of the receiving chamber and the pumping station §With combined arrangement of the receiving chamber and the pumping station Water Intakes Structures General requirement: §Intake allocation - only at concave bank and suitable hydrological and geological conditions

3 Bank’s Water Intakes Structures Separate type (scheme) 1 - receiving well 2 - pumping station 3 - receiving chamber 4 - storage (suction) chamber 5 - suction pipes 6 - mesh screen 7 - inlets 8 - bar rack

4 Bank’s Water Intakes Structures Combined type (scheme) a - option with foundation on rock б - option with foundation on rock or on other ground and with horizontal pump b - option with foundation on rock or on other ground and with vertical pump 1 - receiving chamber 2 - storage (suction) chamber 3 - pumping station 4 - horizontal pump 5 - vertical pump 6 - vertical pump shaft 7 - electric motor 8 - pressurised pipe 9 - suction pipe

5 Bank’s Water Intakes Structures Combined type (real object lay-out) 1 - receiving chamber 2 - storage (suction) chamber 3 - pumping station 4 - service premise 5 - inlets 6 - sluice (for sluice gates) 7 - revolving mash 8 - electric motor 9 - pumps 10 - pressurised pipes 11 - back-washing pipes 12 - sediments withdrawing pipes 13 - sludge pumps 14 - stairs

6 Stream’s Water Intakes Structures Combined type (scheme) 1 - water intake head3 - receiving well (with two chambers) 2 - gravity feeding pipe 4 - pumping station

7 Stream’s Water Intakes Structures Separate type (scheme) 1 - water intake head 2 - gravity feeding pipe 3 - intake well 4 - pumping station 5 - back-washing pipe 6 - receiving chamber 7 - orifices with racks 8 - separation wall 9 - service office 10 - pumps 11 - distribution chamber 12 - suction pipes 13 - pressurised pipes

8 Stream’s Water Intakes Structures Water intakes heads (submergible filtering type) a - simplified construction б, b, г - radial water inlet 1 - filter layer 2 - gravity feeding pipe 3 - concrete case 4 - receiving chamber (space)

9 Stream’s Water Intakes Structures Water intake head (non-submergible type) 1 - gravity feeding gallery 2 - water intake orifices 3 - bar racks 4 - service premise 5 - service platform 6 - ejector 7 - stairs 8 - sluice gates 9 - caisson cutting edge (steel)

10 Mountainous Water Intakes Structures a - plane 1 - dam 4 - drain outlet б - cross section Б - Б 2 - bar rack 5 - weir b - cross section A -A 3 - grit chamber