Siphon Data Fields
A Siphon is an overflow structure that can consist of a single siphon tube or an array of identical siphon tubes. The siphon operates very like a weir structure when the water level is less than or equal to the siphon's Priming level. Above this level the control operates as a siphon.
Siphon data can be edited on either the Siphon Grid Window of the Asset Grid or the Siphon Property Sheet.
To view and edit all siphon data, use the Property Sheet.
The following describes all the data which can be used to define a siphon.
Common Data Fields Fields that are common to the majority of objects can be found in the Common Fields topic.
Siphon Data
Database Table Name: cams_siphon
|
Field Name |
Help Text |
Database Field |
Size |
Precision |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
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|
ID |
The name of the object. The ID is the primary key in the database for the network object. This means that the ID field of each object must be unique for all objects of the same object type. |
id |
Text |
40 |
|
0 |
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Owner |
The proprietor of the asset. |
owner |
Text |
64 |
|
0 |
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US node ID |
The identifier for the upstream node. |
us_node_id |
Text |
40 |
|
0 |
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DS node ID |
The identifier for the downstream node. |
ds_node_id |
Text |
40 |
|
0 |
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System type |
System type:
The options available in the dropdown list depend on which coding standard is being used. See the Standards and Choice Lists dialog for further information. |
system_type |
Text |
10 |
|
0 |
|
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Type |
The type of ancillary structure:
The options available in the dropdown list depend on the choices defined in the Standards and Choice Lists dialog. |
type |
Text |
10 |
|
0 |
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Operational status |
Current operational status:
The options available in the dropdown list depend on the choices defined in the Standards and Choice Lists dialog. |
status |
Text |
10 |
|
1 |
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X coord |
X coordinate of the object. |
x |
Double |
|
XY |
2 |
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Y coord |
Y coordinate of the object. |
y |
Double |
|
XY |
2 |
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Branch ID |
Numeric field used to identify to which long section the link is associated. (See Defining Branches for further information). |
branch_id |
Long Integer |
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|
0 |
|
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Level |
This is the level at which flow first starts to go over the siphon with the crest acting as a weir. |
level |
Double |
|
Z |
3 |
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Width |
The internal width of the siphon tube. The tube is assumed to be rectangular in cross-section. For circular cross-section siphon tubes, the Width is the cross-sectional area divided by the height (Crown level - Crest level). |
width |
Double |
|
MANH_DIM |
1 |
|
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Crown level |
This is the internal top level of the siphon tube. The Crown level minus the Crest level gives the height of the siphon tube. |
crown_level |
Double |
|
Z |
3 |
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Outlet level |
Soffit level of the siphon tube outfall. The siphon is assumed to have a free outfall at this level, and not to be affected by tail water levels. If there are high tail water levels, you should estimate these and use the tail water level as the Outlet level. |
outlet_level |
Double |
|
Z |
3 |
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Priming level |
This is the water level at or below which the siphon will operate as a weir. Above this level the siphon will operate as a primed siphon. You must satisfy the condition Crown level > Priming level > Crest level. |
priming_level |
Double |
|
Z |
3 |
|
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Condition grade |
A measure of asset condition for ancillary assets. By analogy with pipe condition grades, this is usually a number in the range 1-5. Unlike pipe condition grade, there is no distinction between structural and service condition for ancillary assets. |
condition_grade |
Long Integer |
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|
0 |
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Critical |
A measure of the likely impact of asset failure. The WRC SRM uses the codes A, B, C to represent "A" sewers where failures would be expensive to "C" where failures would be relatively cheap. |
criticality |
Text |
5 |
|
0 |
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Security |
The security of the asset from unauthorised access/tampering:
The options available in the dropdown list depend on the choices defined in the Standards and Choice Lists dialog. |
security |
Text |
10 |
|
0 |
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Construction date |
Construction or installation date. This is date from which depreciation costs will be incurred for depreciation reports. |
constr_date |
Date / Time |
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|
0 |
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Condition survey date |
Date of the most recent condition survey of the asset. |
survey_date |
Date / Time |
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|
0 |
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Installation cost |
The original installation cost of the asset. This generally includes all costs incurred (e.g. mantime, asset purchase costs etc). This information is used in depreciation reports. |
install_cost |
Double |
|
WN_COST |
2 |
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Inspection cost |
Estimated cost of asset inspection. |
inspection_cost |
Double |
|
WN_COST |
2 |
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Expected lifetime |
The expected lifetime of the asset. This is used in depreciation reports as the period over which installation costs may be depreciated. |
lifetime |
Long Integer |
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|
0 |
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Rehabilitation cost |
Rehabilitation costs to be incurred in bringing the asset to an acceptable condition. This is used in rehabilitation reports. |
rehab_cost |
Double |
|
WN_COST |
2 |
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Replacement cost |
The estimated cost for completely replacing an asset. |
replace_cost |
Double |
|
WN_COST |
2 |
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| Attachments |
Click the See Attachments Editor and Common Data Fields for further details. |
attachments | Array | ||||||||||||||||||||||
| General properties fields | See Common Data Fields for details of field in the General properties section of the property sheet. | ||||||||||||||||||||||||
| User defined properties fields | See Common Data Fields - User Fields for details of fields in the User defined properties section of the property sheet. | ||||||||||||||||||||||||
| Time series links |
Click the |
tsdb_links |
button to display the Network Data Fields Further information about all the Network Object fields stored in the database can be found in the Network Data Fields section.
