Download DEWA Water Network Design Guidelines Summary

The Dubai Electricity and Water Authority (DEWA) is responsible for providing a reliable and efficient water supply to the city of Dubai. DEWA water network design guidelines provided by DEWA serve as a framework for engineers, developers, and consultants to follow when planning and designing water distribution systems within the emirate. These guidelines ensure that water infrastructure is capable of meeting the growing demand for water while maintaining high levels of service and sustainability.

The DEWA Water Network Design Guidelines are intended to regulate the design, construction, and operation of water supply systems, covering everything from initial planning to the installation of pipes and the management of resources. This article explores the key components of DEWA’s guidelines and the best practices to follow when designing water networks for new developments, infrastructure projects, and utilities in Dubai.

General Design Principles

The first and foremost objective of DEWA water network design guidelines is to provide an adequate, safe, and reliable water supply that meets the needs of Dubai’s residents and industries. Some key design principles include:

System Reliability: The water distribution system should be designed to function reliably under both normal and emergency conditions. It should be resilient to failures, with measures in place for redundancy and rapid recovery.
Efficiency: The water network must be designed to minimize energy consumption and water loss, ensuring that the distribution system operates at peak efficiency.
Sustainability: Emphasizing water conservation, the network must prioritize the use of recycled water where possible, reduce wastage, and integrate smart technologies for monitoring and management.
Scalability: As Dubai continues to grow, the water network should be designed with future expansion in mind. Provisions for scalability must be integrated into the design to accommodate population growth and urban expansion.

Water Supply Sources and Storage

In DEWA’s design guidelines, careful consideration must be given to the sources of water, such as desalinated water, treated sewage effluent, and groundwater. These sources must be supported by appropriate storage facilities:

Reservoirs and Tanks: DEWA mandates that elevated tanks and reservoirs be designed to ensure water availability during peak demand and emergencies. The storage capacity should be sufficient to cater to daily consumption, and provisions must be made for emergency supplies.
Water Treatment Plants: The design must account for the integration of water treatment plants with the network, ensuring that water quality meets or exceeds the standards set by local authorities. The treated water should be free from contaminants and suitable for consumption and use in industrial processes.
Redundancy: Multiple sources of water and backup storage should be part of the network design to mitigate risks associated with supply interruptions.

Pipe Design and Materials

The water pipes used in the network must meet stringent standards to ensure that they are durable, leak-free, and suitable for the harsh environmental conditions in Dubai. DEWA provides specific guidelines for pipe materials and dimensions:

Materials: Commonly used materials include ductile iron, PVC (polyvinyl chloride), and steel, which are chosen for their resistance to corrosion, longevity, and ease of installation. Ductile iron is often used for larger diameter pipes, while smaller pipes may be made from PVC or HDPE (high-density polyethylene).
Pipe Sizing: The size of the pipes depends on factors like water demand, peak flow rates, and the area being served. DEWA specifies the required pipe diameters for various types of applications and flow rates.
Pressure and Flow: The network design must maintain a consistent water pressure to ensure adequate service throughout the city. The guidelines detail pressure zones and the maximum allowable pressures to prevent damage to the network and fixtures.

Hydraulic Design and Network Modeling

One of the essential aspects of the DEWA Water Network Design Guidelines is hydraulic analysis. This process ensures that the system operates efficiently and meets the water demand at various points in the network. Key aspects include:

Flow Analysis: Designers must analyze the flow of water throughout the network to ensure that it can deliver the required volume at each node, particularly during peak demand.
Pressure Zones: The network must be divided into pressure zones to maintain consistent water pressure. Each zone is designed to operate within a specific pressure range to prevent pipe bursts or underperformance.
Modeling Software: DEWA recommends the use of advanced hydraulic modeling software to simulate various scenarios and determine the most efficient design. These models help in optimizing the network layout, identifying potential bottlenecks, and ensuring that the system can meet future demands.

Valve and Control Systems

DEWA Water Network Design Guidelines emphasize the importance of a well-maintained valve and control system to regulate water flow and pressure within the network. Key components of these systems include:

Control Valves: These are used to manage the flow and pressure within the system, allowing for remote or manual operation in the event of system maintenance or emergencies.
Isolation Valves: These valves allow specific sections of the network to be isolated for repair or maintenance without affecting the rest of the system.
Backflow Prevention: Measures to prevent the reverse flow of water from the distribution system into the supply system must be incorporated, ensuring that the water quality is not compromised.

Leak Detection and Maintenance

To reduce water loss, DEWA emphasizes the need for a proactive approach to leak detection and system maintenance:

Smart Monitoring Systems: DEWA encourages the use of advanced smart technologies that allow for real-time monitoring of the network’s performance. Sensors and smart meters can detect leaks, monitor water pressure, and alert operators to any irregularities.
Maintenance Programs: Regular inspections and maintenance programs are crucial to ensure the longevity of the water network. This includes cleaning, inspecting valves and meters, and repairing any damaged pipes.

Environmental and Safety Standards

The DEWA Water Network Design Guidelines are designed with strict adherence to environmental protection and safety standards. The water distribution system must:

Minimize Environmental Impact: Careful planning should be implemented to minimize the environmental footprint of the network, including reducing water loss, energy consumption, and noise pollution.
Adhere to Safety Standards: All infrastructure must comply with local health, safety, and environmental regulations to protect workers and the public. This includes the safe installation and maintenance of pipelines and ensuring that the water remains safe for consumption.

Documentation and Approvals

Before construction begins, developers must submit detailed designs and plans for approval by DEWA. These documents should include:

Design Calculations: Hydraulic calculations, pipe sizing, and pressure zone specifications must be provided.
Material Specifications: Detailed information about the materials used for pipes, valves, and other components must be submitted for approval.
Compliance with Regulations: The design must comply with DEWA’s standards and local regulations, ensuring that all safety and environmental measures are met.