WHO Technical Note for Emergencies 4: Rehabilitating small-scale piped water distribution systems

The damage caused to pipe networks by natural disasters can be widespread and extensive. It can range from minor breaks to complete loss of whole sections of the system. A full systematic survey of the entire network is the only way of identifying the true extent of the damage. This may not be possible in an emergency where it is a priority to re-instate a basic level of supply.
 
This techical notes examines these priorities and the process of rehabilitating small-scale piped water distribution systems.

Contents:

Steps of rehabilitation

Step 1: Assess the extent of the damage

Step 2: Keep consumers informed

Step 3: Provide an alternative water supply

Step 4: Isolate damaged sections of the network