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name (ls_unit.ele)

Name of the element

The name of the element is not used by the model.

elem_tot

Number of columns to read for list of elements in the Landscape Unit

If each element in the Landscape Unit is listed individually, the number of columns to read will equal the number of elements in the Landscape. However, if there are several elements with consecutive numbers in a Landscape, they can be listed by specifying the first one in one column and the last one with a hyphen in front of it in the next column.

elements

If elem_tot = 1, there can be only one element in the Landscape Unit, whose number (id in rout_unit.ele) is specified in this column. If elem_tot >1, this column is followed by additional columns listing the elements included in the Landscape Unit, but those columns will not have a header. If there are several elements with consecutive numbers in a Landscape Unit, they can be listed by specifying the first one in one column and the last one with a hyphen in front of it in the next column.

name (ls_unit.def)

Name of the Landscape Unit

The name of the Landscape Unit is not used by the model

Landscape Units

A Landscape Unit (LSU) is a collection of HRUs. It can be equivalent to a subbasin, a floodplain or upland unit, or a grid cell with multiple HRUs. LSUs are currently only used for summarizing landscape outputs. Two files are needed to define which HRUs are part of which LSU:

  • specifies which HRUs a LSU contains.

  • lists all HRUs and their corresponding LSU and basin fractions.

ls_unit.def
ls_unit.ele

id (ls_unit.ele)

ID of the element

The ID of the element is a primary key referenced by in . All IDs in the ls_unit.ele file must be unique.

elements
ls_unit.def

obj_typ_no

The object ID of the element is a foreign key referencing the HRU ID in the HRU file.

connect

id (ls_unit.def)

ls_unit.def

This file defines which HRUs are elements of the Landscape Units in a SWAT+ setup.

Field
Description
Type

ID of the Landscape Unit

integer

Name of the Landscape Unit

string

Number of columns to read for list of elements in the Landscape Unit

integer

First column listing elements in the Landscape Unit

integer

id
name
elem_tot
elements

obj_typ

Object type of the element

HRUs are the only spatial objects that can be elements of a Landscape Unit.

bsn_frac

ls_unit.ele

This file lists the HRUs that are elements in a Landscape Unit.

Field
Description
Type

ID of the element

integer

Name of the element

string

Object type of the element

string

Object ID of the element

integer

bsn_frac

Fraction of basin area assigned to this object

real

lsu_frac

Fraction of Landscape Unit area assigned to this object

real

id
name
obj_typ
obj_typ_no