Relevant to Water Quality Simulations only.
The Sediment Grading object is used when carrying out sediment modelling in River Reaches. The sediment grading allows bed material distribution to be defined by specifying the proportion of each sediment fraction that is present. The sediment grading is associated with a River Reach or Bridge by referencing the grading object using the river reach/bridge grading data fields.
The following table describes all the Sediment Grading specific data which can be used to define a Sediment Grading.
Fields that are common to the majority of objects can be found in the Common Fields topic.
Sediment Grading Data
Database Table Name: hw_sediment_grading
| Field Name | Description |
Database Field |
Data Type |
Size |
Units |
Precision |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Grading ID |
Name for the Sediment Grading |
grading_id |
Text |
64 |
|
0 |
|
|
|
|
|
|
Grading Type |
Read only field. The only possible values are Built-in and User. Only the User type of Sediment Grading can be edited. |
grading_type |
Text |
7 |
|
0 |
User |
|
|
|
|
|
SF1 weight |
Proportion in the bed material of sediment fraction 1 |
sf1_weight |
Double |
|
|
3 |
1 |
0 |
1 |
|
|
|
SF2 weight |
Proportion in the bed material of sediment fraction 2 |
sf2_weight |
Double |
|
|
3 |
0 |
0 |
1 |
|
|