Head unit flow tables are used to define the relationship between head and:
- flow per unit length of crest of Base Linear Structures (2D) that have Structure type set to User control, where head is the difference between the upstream water level and either the downstream water level or the crest level of the structure, whichever is higher
- unit flow through the 2D Boundary when the Boundary line type is set to Level & Head/discharge, where head difference is the difference between upstream water level and either downstream water level or crest level, whichever is higher.
The following describes all the data used to define a Head Unit Flow.
Fields that are common to the majority of objects can be found in the Common Fields topic.
Head Unit Flow Data
Database Table Name: hw_head_unit_discharge
|
Field Name |
Description |
Database Field |
Size |
Precision |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Head unit flow ID |
Name for the Head Unit Flow Table. |
head_unit_discharge_id | Text | 64 | 0 | ||||||||||||||||||||||||||||||||||||||||||
| Description | Description of Head Unit Flow Table. | head_unit_discharge_description | Text | 80 | 0 | ||||||||||||||||||||||||||||||||||||||||||
| Head unit flow table |
Defines the relationship between head difference and unit flow. Database Table Name: hw_head_udis_HDP
|
HUDP_table | Array | 0 |