Water Supply Design Tools
Preliminary hydraulic screening calculators with explicit user inputs
Swipe to see all calculation steps →
Use 6 separate calculations: Water Demand, Pipe Sizing, Tank Design, Pump Station, Pipe Headloss, Pressure Zones. These tabs do not author or solve a connected network.
ใช้เครื่องมือคำนวณแยก 6 รายการสำหรับความต้องการน้ำ ขนาดท่อ ถัง ปั๊ม การสูญเสียแรงดันในท่อเส้นเดียว และโซนแรงดัน โดยยังไม่ใช่แบบจำลองโครงข่ายที่เชื่อมต่อกัน
When to use
- Sizing distribution mains and service lines for a demand scenario
- Checking single-pipe headloss with a selected formula
- Selecting a pump duty point and sizing storage / fire reserve
How to use
- 1Choose one calculation: Demand, Pipe Sizing, Tank Design, Pump Station, Headloss, Pressure Zones.
- 2Enter flow, length, roughness (C or ε) and elevation data.
- 3Review velocity/pressure checks against design criteria.
Key formulas
Hazen-Williams head loss (SI)
h_f = 10.67 · L · Q^1.852 / (C^1.852 · D^4.87)
Q (m³/s), D,L (m), C = roughness coefficient
Darcy-Weisbach
h_f = f · (L/D) · V² / (2g)
f from Colebrook–White; V = velocity (m/s)
Continuity / pipe sizing
Q = V · A = V · (π/4) · D²
Pipe diameter for a target velocity
- Design flow Q
- 50 L/s = 0.05 m³/s
- Target velocity V
- 1.2 m/s
A = Q/V = 0.0417 m² → D = √(4A/π) = 0.230 m → use DN250
References
- • AWWA M32 — Computer Modeling of Water Distribution Systems
- • Metcalf & Eddy (2014); Mays, Water Distribution Systems Handbook
- • Hazen-Williams / Darcy-Weisbach references used by the calculation tabs
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