Fountain and Water Feature Hydraulics: Calculations and Equipment Selection

• Two fountains at different levels (ground +100.000, basement +94.900) with different pipe routes and sleeves
• Reconciling calculations with the BOQ after review comments
• Sizing circulation and filtration for different volumes at a one-hour turnover

• Circulation: 26.6 m³/h for the ground fountain (two filters of about 580 mm) and 7.8 m³/h for Basement 1 (one filter of about 450 mm)
• Circulation pumps: 13.3 m³/h at 19.7 m (2 duty + 1 standby) for ground and 7.8 m³/h at 19.7 m (1 + 1) for the basement
• Display pumps: 39.2 m³/h at 15.7 m for ground and 18.9 m³/h at 14.4 m for the basement
• Make-up for evaporation: 3.41 m³/h (32 mm tie-in) and 1.77 m³/h (25 mm)
• Main drains: 8 and 3 per the Egyptian code and ASPE, and 36 jet nozzles of 4.5 L/min
• Section and level drawings for both fountains with UPVC pipes from 50 to 160 mm

Technical Highlights

• Volume, turnover, filtration and 10-minute backwash calculations aligned with manufacturer data
• Chemical dosing: 100 L acid and chlorine tanks with diaphragm pumps
• Calculations showed the GRP tanks listed in the BOQ were not required

Deliverables

• Ground fountain calculation file
• Basement 1 fountain calculation file
• Section sketches and details for both fountains
• Comparison sheet: calculated vs BOQ
• Referenced sand filter and nozzle data sheets