WATSYS/WaterMax Conversion Notes

This topic discusses how InfoWorks converts existing WATSYS network components into an InfoWorks network and InfoWorks network objects. Some data is not imported at all, or is only partially imported. Some WATSYS objects are imported as more complex InfoWorks objects, and additional data will be required to completely define these InfoWorks objects.

The following data groups are read by the IWWS WATSYS importer:

• Global Data
• General **GE
• Defaults **DZ
• Electricity Tariffs **ET
• Demand Types **DT
• Demand Variation Curves **DC
• Daily Curve Sequences **CS
• Daily Demand Factor Sequences **FS
• Valve Characteristics **VC
• Sub-System Data
• System Name **SY
• Nodes **ND
• Head Points **HP
• Reservoirs **RE
• Pipes **PI
• Valves **VA
• Pumping Stations **PU
• Demands **DE
• Demand Areas **DA

Global Data

General **GE Data Group

The WATSYS General Data Group is used to define units and simulation parameters.

The IWWS WATSYS Importer reads:

 

The following defaults are imposed for simulation settings:

Defaults **DZ Data Group

The IWWS WATSYS Importer reads the following Secondary Records:

• @D Pipe Diameter Default
• @E Pipe Roughness Default
• @F Pipe Fitting Coeff Default

The defaults are used, if necessary, to generate the corresponding pipe data.

Electricity Tariffs **ET Data Group

Data from the WATSYS Electricity Tariff group is imported into an IWWS Electricity Tariff.

The WATSYS Importer reads:

 

Demand Types **DT Data Group

See the Demand Records section for further details.

The IWWS Importer reads:

 

Demand Variation Curves **DC Data Group

WATSYS default curves 1-7 will be imported, unless overwritten by a WATSYS user defined demand variation curve.

See the Demand Records section for further details.

The IWWS Importer reads:

 

Daily Curve Sequences **CS Data Group

See the Demand Records section for further details.

Daily Demand Factor Sequences **FS Data Group

See the Demand Records section for further details.

 

Valve Characteristics **VC Data Group

Notes on import of Valve Characteristics:

• The WATSYS default valve curves are imported into the IWWS Valve Curves grid.
• If a user defined valve is defined in the WATSYS file, the user defined curve will be imported into the IWWS Valve Curves grid, if the coefficient values are K values.
• If L or CV values are used, a valve curve specific to the Valve in the Valve data group will be imported into the IWWS Valve Curves grid. The L or CV values are converted to K values using the specified valve diameter or a default diameter of 555mm. The IWWS Valve Curve ID for the valve will be based on the WATSYS valve Label.

The IWWS WATSYS Importer reads:

 

Sub-System Data

All WATSYS/WaterMax network objects are imported with the exception of Sprinklers which remain ordinary nodes.

System Name **SY

The IWWS WATSYS importer reads the first two characters of the System Name, which are appended to each imported object ID.

Node Records **ND

The IWWS WATSYS Importer reads:

Head Point Records **H

WATSYS Head Points are imported as IWWS Fixed Head objects.

The IWWS WATSYS importer reads:

Reservoir Records **RE

Notes on import of Reservoirs

• If the WATSYS Initial Depth is such that either of the IWWS maxima for depth or volume are exceeded, the reservoir is imported as a fixed head set to the Initial Depth.
• If the WATSYS Overflow Level is greater than the IWWS maximum depth the Top Water Level is set to the maximum depth.
• If the WATSYS Level / Cross-Sectional Area pairs are such that the reservoir depth or volume exceeds the IWWS limits, the top of the reservoir is removed proportionally until both depth and volume are within the IWWS limits.
• If the WATSYS Level / Cross-Sectional Area pairs are such that the reservoir depths are within the Top and Bottom water levels, IWWS extrapolates the Depth Volume curve between the top and bottom water levels.

 

The IWWS WATSYS importer reads:

Pipe Records **PI

The IWWS WATSYS Importer reads:

Valve Records **VA

Valves are imported with the following pipe default values:

 

The IWWS WATSYS Importer reads:

Pump Station Records **PU

Notes on import of Pump Stations

• All pumps are imported with a fixed speed of 1450 rpm
• All pump stations are imported as PLAN PSTs with the first pump on permanently

Pump Stations are imported with the following pipe default values:

The IWWS WATSYS Importer reads:

Demand Records **DE

Notes on Demand Records:

• A demand category will be imported into the IWWS Demand Diagram for each Default Record in the WATSYS Demand Record group that is used at a node in the network.
• Default Records are converted to a sequence of time, flow factor pairs. If the WATSYS Area Size and all flow factors in the Area Label are positive, the demand records are imported directly as Node Demands. Any demand at a Head Point is ignored.
• The WATSYS Curve Sequence is determined from the Demand Record default record
• The WATSYS Demand Variation Curves that make up the profile are determined from the Curve Sequence
• Multiplying factors from the Demand Types group are applied.
• The resulting profile is imported into the Demand Diagram as a seven day profile starting from the day specified during the import process on the Select File Page. The WATSYS/WaterMax sequence will be truncated if it is greater than seven days or extended if it is less than seven days.
• A Demand Scaling object is created on import of a WATSYS/WaterMax model. The Demand Factor in the Demand Default Record is converted to a category scaling factor in the Demand Scaling.
• Daily Demand Factor Sequences group are imported as Daily Coefficients in the Demand Diagram. (Only the first seven values are used.)
• If either the WATSYS Area Size or any of the flow factors in the Area Label are negative, the node will be imported as an IWWS Transfer Node, provided it is not a Head Point or a Reservoir. The Transfer Node flow profile is constructed by summing all Demand Records for that node.
• Any negative demand at a Reservoir results in all demand at that node being cancelled.

The IWWS WATSYS Importer reads:

Demand Area Records **DA

Demand Area records are imported in the same way as Demands. If the WATSYS demand is assigned to a pipe, the demand is divided equally between the two connecting nodes.