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Wetlands

Wetlands are HRUs in which ponding of water on the surface is allowed. There are two files that are specific to wetlands:

Main wetland file: wetland.wet
Wetland hydrology: hydrology.wet

For defining the remaining wetland properties, the following reservoir files are used:

Wetland initialization: initial.res
Wetland sediment: sediment.res
Wetland nutrients: nutrients.res
Wetland release: res_rel.dtl

wetland.wet

This file contains pointers referencing several files that specify the wetland properties.

Field

Description

Type

id (wetland.wet)

ID of the wetland

The ID of the wetland is not used by the model.

name (wetland.wet)

Name of the wetland

The name of the wetland is a primary key referenced by in . All names in the wetland.wet file must be unique.

init

Pointer to the reservoir and wetland initialization file

The pointer to the reservoir and wetland initialization file is a foreign key referencing in .

hyd

Pointer to the wetland hydrology file

The pointer to the wetland hydrology file is a foreign key referencing name in hydrology.wet.

rel

Pointer to the reservoir and wetland release decision table file

The pointer to the wetland release file is a foreign key referencing name in .

sed

Pointer to the reservoir and wetland sediment file

The pointer to the reservoir and wetland sediment file is a foreign key referencing in .

nut

Pointer to the reservoir and wetland nutrient file

The pointer to the reservoir and wetland nutrient file is a foreign key referencing name in nutrients.res.

hydrology.wet

This file contains the wetland hydrology parameters.

Field

Description

Type

Unit

Default

Range

name (hydrology.wet)

Name of the wetland hydrology record

The name of the wetland hydrology record is a primary key referenced by in . All names in the hydrology.wet file must be unique.

hru_ps

Fraction of HRU area at principal spillway

dp_ps

Average depth of water at principal spillway

hru_es

Fraction of HRU area at emergency spillway

dp_es

Average depth of water at emergency spillway

k

Hydraulic conductivity of the wetland bottom

If seepage occurs in the wetland, the hydraulic conductivity must be set to a value other than 0.

evap

Wetland evaporation coefficient

This coefficient is a linear multiplier for PET that can be used to de- or increase wetland evaporation.

vol_area_co

Volume surface area coefficient for HRU impoundment

vol_dp_a

Volume depth coefficient for HRU impoundment

vol_dp_b

Volume depth coefficient for HRU impoundment

hru_frac

Fraction of HRU that drains into wetland