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'object'.con

This file defines the connectivity of spatial objects.

Field

Description

Type

Unit

Default

Range

id

Unique ID of the object

The unique ID of the object is a primary key that is referenced by .

Please be aware that the unique ID of the object is not necessarily the same as the ID in QSWAT+. The GIS interface numbers the objects when they are first created. Later in the process, some objects might be replaced by others, e.g. channels that are located within reservoirs. When the SWAT+ Editor writes the SWAT+ input files, it assigns consecutive ID numbers to those objects that are still included in the final setup of the model. It is extremely important to pay attention to this when identifying the channels that streamflow gauges are located on for comparing simulated and observed data.

name

Name of the object

The SWAT+ Editor assigns a name to every object, which is typically the abbreviation of the object type followed by the object number in QSWAT+. However, the name of the object is not used by SWAT+, so the user may change it.

gis_id

Object ID in QSWAT+

Please be aware that the ID in QSWAT+ is not necessarily the same as the unique ID of the object. The GIS interface numbers the objects when they are first created. Later in the process, some objects might be replaced by others, e.g. channels that are located within reservoirs. When the SWAT+ Editor writes the SWAT+ input files, it assigns consecutive ID numbers to those objects that are still included in the final setup of the model. It is extremely important to pay attention to this when identifying the channels that streamflow gauges are located on for comparing simulated and observed data.

area

Area of the object

HRU: Area of HRU, conversion from mm to m3

Routing Unit: Area of Routing Unit, conversion from mm to m3

Aquifer: Area of aquifer, conversion from mm to m3

Reservoir/Channel: Drainage area of the channel/reservoir

Outlet: not used

Recall: not used

Export coefficient: not used

Delivery ratio: not used

lat

Latitude of the object

lon

Longitude of the object

elev

Elevation of the object

used for lapse rates

'obj'

Pointer to the object data file

The pointer to the object data file is a foreign key referencing the unique ID in the respective object data file. The header of this column is different in each connect file.

Connect file

Column header

Object data file

wst

Pointer to the weather station file

The pointer to the weather station file is a foreign key referencing in .

cst

Pointer to the constituent file

ovfl

Pointer to the overbank flooding file

rule

Pointer to the decision table for hydrograph fractions

out_tot

Total number of outgoing hydrographs

The next four columns (obj_typ, obj_id, hyd_typ, frac) are repeated for each outgoing hydrograph.

obj_typ

Type of the receiving object

Code

Definition

Recall, Export Coefficient, and Delivery Ratio objects cannot be receiving objects.

obj_id

ID of the receiving object

The ID of the receiving object is a foreign key referencing the object ID (id) in the connect file of the receiving object.

hyd_typ

Type of hydrograph that is sent to the receiving object

The types of hydrographs that can be sent depend on the object. The code tot is used for several spatial objects, but its meaning differs between objects.

Code

Object

Definition

frac

Fraction of hydrograph sent to the receiving object

When editing the fractions, the user has to make sure that they add up to 1. Otherwise, water will be added or removed from the system and the water balance will not close.