The sub drain area feature rules check the sub-drain area, sub-drain area drains, sub-drain area sections, sub-drain area manholes, and the transferal of values from the model table to the sub-drain area table.
Each sub-drain area can belong to one drain area. This relation is stored in the attribute WW_SUB_DRAIN_AREA.FID_DRAIN_AREA.
Also, feature rules calculate some values, transfer values from the model table, and connect the sub-drain area to a section or a manhole.
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Compute Sub Drain Area
— Calculates the following significant values:
COVERED_AREA = AREA * DISCHARGE_COEFFICIENT
NOT_COVERED_AREA = AREA * (1-DISCHARGE_COEFFICIENT)
INHABITANT_DENSITY = INHABITANT/HECTARE [ha]
- Connect Sub Drain Area Drain Area — Connects a sub-drain area to the drain area, when you digitize a sub-drain area that lies within a drain area. When two or more drain areas are found, they are highlighted and you can select which one to assign. See WW_ConnSubAreaWDrainArea_BIU.
- Connect Sub Drain Area Section — Connects a section with a sub-drain area if it is contained in the sub-drain area. Also, this rule checks whether the utilization for the sub-drain area and the section match. See WW_ConnSubDrainAreaSection_BI or WW_ConnSubDrainAreaSection_BU.
- Connect Sub Drain Area Manhole — Connects the start manhole or end manhole of a section with a sub-drain area if it is contained in this area. Also, this rule checks whether the utilization for the sub-drain area and the manhole match. See WW_ConnSubDrainAreaManhole_BIU.
- Transfer Value from Model — When you select a model for the sub-drain area, this rule transfers the corresponding value from the model table to the sub-drain area table.
In Infrastructure Administrator , you can disable the feature rules. See Wastewater Feature Rules.