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hyd-sed-lte.cha

This file controls the channel hydrology and sediment properties.

Field

Description

Type

Unit

Default

Range

Name of the channel hydrology and sediment record

string

n/a

name (hyd-sed-lte.cha)

Name of the channel hydrology and sediment record

The name of the channel hydrology and sediment record is a primary key referenced by hyd in channel-lte.cha.

wd

Channel width

dp

Channel depth

slp

Channel slope

The channel slope is calculated by QSWAT+ based on the DEM.

len

Channel length

The channel length is calculated by QSWAT+ based on the DEM.

mann

Channel Manning's n

k

Effective hydraulic conductivity of the channel alluvium

erod_fact

Channel erodibility factor

A value of erod_fact = 1 indicates that there is no resistance to erosion. A value of erod_fact = 0 is suitable for non-erosive channels.

cov_fact

Channel cover factor

A value of cov_fact = 1 indicates that there is no vegetative cover on the channel. A value of cov_fact = 0 indicates that the channel is completely protected from erosion.

sinu

Channel sinuosity

Channel sinuosity is a measure of how much a river or stream channel deviates from a straight line between two points. It is calculated by dividing the length of the channel by the straight-line distance between its endpoints.

For rivers, the conventional classes of sinuosity are:

sinu <1.05: almost straight
1.05 ≤ sinu <1.25: winding
1.25 ≤ sinu <1.50: twisty
1.50 ≤ sinu: meandering

eq_slp

Equilibrium channel slope

d50

Channel median sediment size

The table below lists the D50 values of different sediment classes:

Sediment class

Size [µm]

Approximate size

Boulders

> 256,000

> Volley ball

Cobbles

> 64,000

> Tennis ball

clay

Clay content of channel bank and bed

carbon

Carbon content of channel bank and bed

dry_bd

Dry bulk density of the channel

side_slp

Channel side slope

bed_load

Percent of sediment entering the channel that is bed material

fps

Floodplain slope

fpn

Floodplain Manning's n

n_conc

Nitrogen concentration in channel bank

p_conc

Phosphorus concentration in channel bank

p_bio

Fraction of phosphorus in bank that is bioavailable