5. Needs identification
As in most urban centres in Algeria, the current situation is marked by a difficult management of water resources
and its distribution. This management admits the enormous effort in mobilizing the resources especially through the
implementation of new dams, were not enough to satisfy the needs of a constantly growing population.
The dramatic change in rainfall conditions has worsened the situation.
An analysis of the situation thus highlights the following problems:
• A discontinued functioning of the distribution with few hours limited service per week, depending on the
availability of resources.
• Hygienic and health problems appeared from this mode of operation and storage house holdings, as well as
the interconnections of cleansing network with old pipes.
• The huge losses which in most networks exceed 50% of production.
• Facilities in bad conditions due to lack of support and maintenance.
• Very decayed facilities that require renewal
• An advanced degradation state of pipes by corrosion.
• Facilities deterioration by lack of water and air introduction (frequent draining of pipes ....)
• Extensions dictated by the emergency and random non-studied design.
• Building quality is often bad due to insufficient work inspection....
According to the problems analysis, also, for a proper function of the UCT, water supply network, the identified
needs are:
• Continuous operating supply,
• Reduced rate of loss
• Reduced Rate of incorrect branching
• Guaranteed maintenance budget
• Sufficient water quantity.
• Acceptable water quality
• Convenient long lasting
For the UCT, two alternatives are proposed in order to improve the situation of the water supply, namely:
• Renovation of the entire network,
• Rehabilitation of the network
We chose the second one, because part of the network is already in good shape; it can fill in the supply functions of
drinking water for many neighbourhoods.
5. Needs identificationAs in most urban centres in Algeria, the current situation is marked by a difficult management of water resourcesand its distribution. This management admits the enormous effort in mobilizing the resources especially through theimplementation of new dams, were not enough to satisfy the needs of a constantly growing population.The dramatic change in rainfall conditions has worsened the situation.An analysis of the situation thus highlights the following problems:• A discontinued functioning of the distribution with few hours limited service per week, depending on theavailability of resources.• Hygienic and health problems appeared from this mode of operation and storage house holdings, as well asthe interconnections of cleansing network with old pipes.• The huge losses which in most networks exceed 50% of production.• Facilities in bad conditions due to lack of support and maintenance.• Very decayed facilities that require renewal• An advanced degradation state of pipes by corrosion.• Facilities deterioration by lack of water and air introduction (frequent draining of pipes ....)• Extensions dictated by the emergency and random non-studied design.• Building quality is often bad due to insufficient work inspection....According to the problems analysis, also, for a proper function of the UCT, water supply network, the identifiedneeds are:• Continuous operating supply,• Reduced rate of loss• Reduced Rate of incorrect branching• Guaranteed maintenance budget• Sufficient water quantity.• Acceptable water quality• Convenient long lastingFor the UCT, two alternatives are proposed in order to improve the situation of the water supply, namely:• Renovation of the entire network,• Rehabilitation of the networkWe chose the second one, because part of the network is already in good shape; it can fill in the supply functions ofdrinking water for many neighbourhoods.
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