Network Planning (System Design Phase)
At the network planning stage, the overall structure of the drinking water distribution system is defined. This phase translates demand forecasts and topographical conditions into a coherent hydraulic concept. A well-developed planning foundation ensures that the system operates efficiently, reliably, and with sufficient flexibility for future developments.
1. Water demand analysis
☐ Water demand defined and verified
A clear understanding of current and future water demand is essential for all subsequent design steps. It forms the basis for sizing the entire distribution system and ensures that supply capacity matches real consumption patterns.
2. Peak demand calculation
☐ Peak demand and demand fluctuations calculated
In addition to average consumption, peak demand scenarios must be considered. These determine the maximum hydraulic load on the system and are critical for ensuring reliable supply during high-demand periods.
3. System redundancy
☐ Redundancy concept integrated into network design
Redundancy ensures that the system can continue operating even when individual components fail or are under maintenance. This increases reliability and reduces the risk of supply interruptions.
4. Network structure evaluation
☐ Loop and alternative network structures evaluated
Different network layouts are assessed, with a strong focus on looped systems due to their improved hydraulic stability and operational flexibility. The chosen structure must balance cost, reliability, and water quality considerations.
5. Pressure zone planning
☐ Pressure zones defined according to topography
The system is divided into pressure zones to manage elevation differences and maintain stable operating pressures. This prevents both under- and over-pressure conditions within the network.
6. Future expansion capability
☐ Future growth and expansion potential considered
The network is designed with flexibility for future population growth and infrastructure expansion. This avoids costly redesigns and system upgrades in later stages.
7. Hydraulic sizing of pipelines
☐ Pipe diameters calculated and hydraulically optimized
Pipeline dimensions are determined based on flow requirements, pressure conditions, and acceptable velocity ranges. Proper sizing is essential to minimize energy losses and ensure efficient operation.
8. Operational reliability assessment
☐ Overall system reliability evaluated
The final network concept is assessed in terms of robustness, failure resilience, and long-term operational stability. This ensures that the system performs reliably under real-world conditions and varying demand scenarios.