A drain area is a region of land where water flows into a specified body of water, such as a river, lake, sea, ocean, or sewer pipe.
The Drain Area topic contains polygon and attribute feature classes for creating drain and sub-drain areas in a wastewater network.
Model tables store several types of a particular network item and can be grouped by sub-drain area. Model tables have the suffix *_MODEL.
You use the Sub Drain Area Creation workflow to digitize a drain area.
A drain area is directly connected to a section and a network point. It is used for flow computations such as how much wastewater flows in the section. Its properties are collected in a model table.
Each section can be assigned to one sub drain area.
- Feature class — WW_DRAIN_AREA
- Feature type — Polygon
- Related table — WW_DRAIN_AREA_TBL
| Name | Data Type | Description |
|---|---|---|
|
AREA |
Number |
The area size, measured in square meters. |
|
GEOM |
Geometry |
Feature geometry polyline. For more information, see Oracle Spatial Users Guide and Reference. |
|
NAME_NUMBER |
Varchar2 |
The name or number of this item. |
|
NARRATIVE |
Varchar2 |
A description or other unique information concerning this item. |
|
USER_FLAG |
Varchar2 |
An operator defined work area. This attribute can be used by the operator for user defined system processes. It does not effect this item's data integrity and should not be used to store this item's data. |