Service Zone Demand Centers

Table SERVICE_ZONE_DEMAND_CENTERS belongs to the class of station tables. It describes the relation of Demand Centers to WWTP service zones. This relation is required for the wastewater module.

The field PORTION has been recently added. It has two purposes:

If the treatment plan was a "virtual" one (i.e. only meant to process the "wastewater produced from industries") the value is set to 0, i.e. no collection of municipal wastewater.
If a settlement is served by several WWTP's (the city of Irbid is the currently the only occurrence) the value will describe how the total generated municipal sewage will be distributed to the individual WWTP's. In that case, the same SETT_ID will appear over several records.
In all other cases the value is set to 100. Of course, this does not mean that 100% of the municipal wastewater of a settlement is flowing to a treatment plan; that value is still reduced by coverage rate and return factor.

The table below shows just a small selection of records. Currently, there are almost 1400 records in table SERVICE_ZONE_DEMAND_CENTERS.

SETT_ID	SERVICE_ZONE	PORTION	COMMENTS
139	AD04	100	W. Shalala -Irbid E. WWTP Zone
140	AD04	20	W. Shalala -Irbid E. WWTP Zone
140	AE01	30	Irbid (Central) WWTP Zone
140	AE02	50	Wadi Al Arab WWTP Zone
141	AL03	100	Abu Nuseir WWTP Zone
142	AL01	100	As Samra WWTP Zone
143	CD01	100	Al Jiza WWTP Zone
144	AD12	0	Al Mafraq5 WWTP Zone
145	CD04	0	Al Karak14 WWTP Zone

The relevant fields are:

SETT_ID (for linking)
SERVICE_ZONE (for linking)
PORTION (see above)

Note: The service zones are not to be confused with the supply zones, which refer to the distribution of water from resources (network, wells) to Demand Centers.