The data that makes up the headloss curves can be displayed and edited on the Headloss Curve Grid Window of the Links Grid or on the Headloss Curve Property Sheet.
The following table describes all the Headloss Curve specific data which can be used to define a Headloss Curve.
Fields that are common to the majority of objects can be found in the Common Fields topic.
Headloss Curve Data
Database Table Name: hw_headloss
| Field Name | Help Text |
Database Field |
Data Type |
Size |
Units |
Precision |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Headloss ID |
Name for the Headloss Curve - maximum 32 characters |
headloss_type |
Text |
64 |
|
0 |
|
|
|
|
|
|
Curve Type |
Read only field. The only possible values are Built-in and User. Only User type Headloss Curves can be edited. |
curve_type |
Text |
7 |
|
0 |
User |
|
|
|
|
|
Minimum surcharge ratio |
The value entered in the minimum surcharge ratio field will be used as the first Ratio value in the Ratio / Value (K) grid. |
min_surcharge_ratio |
Double |
|
|
4 |
|
0 |
|
|
|
|
Surcharge ratio step |
The Ratio values in the Ratio / Value (K) grid will be incremented by the surcharge ratio step for each K value entered in the grid. |
surcharge_ratio_step |
Double |
|
|
4 |
|
0.00001 |
|
|
|
|
Surcharge ratio factor array |
A series of headloss factor values against surcharge ratio values, displayed in a Ratio / Value (K) grid. |
surcharge_ratio_factor_array |
Array |
|
|
4 |
|
0 |
|
|
|
|
Minimum velocity |
The value entered in the minimum velocity field will be used as the first Velocity value in the velocity / value grid |
min_velocity |
Double |
|
V |
4 |
|
|
|
|
|
|
Velocity step |
The velocity ratio values in the velocity / value grid will be incremented by the minimum velocity step for each velocity ratio value entered in the grid. |
velocity_step |
Double |
|
V |
4 |
|
0.00001 |
|
|
|
|
Velocity factor array |
A series of velocity ratio values against velocity values, displayed in a velocity / ratio grid. |
velocity_factor_array |
Array |
|
|
4 |
|
|
|
|
|
|
Notes |
You can keep freeform notes about any object in your network. The notes field can be up to 64,000 characters in size, or about 10 pages of printed text. |
notes |
Memo |
|
|
0 |
|
|
|
|
|