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Table 3 List of parameters used in the two models

From: Variable withdrawal elevations as a management tool to counter the effects of climate warming in Germany’s largest drinking water reservoir

Model

Parameter

Description

Value

GLM

C K

Convective overturn coefficient (–)

0.2

GLM

C KH

Kelvin–Helmholtz turbulent billows (–)

0.3

GLM

C W

Wind stirring coefficient (–)

0.23

GLM

K w

Averaged background light attenuation (m−1)

0.83

GLM

C E

Latent heat transfer coefficient (–)

0.0013

GLM

C H

Sensible heat transfer coefficient (–)

0.0013

GLM

C D

Coefficient for transfer of momentum (–)

0.0013

GLM

F wind

Wind factor (–)

0.89

GLM

F sw

Shortwave radiation factor (–)

1

W2

WSC

Wind sheltering coefficient (–)

1

W2

SHADE

Shade fraction coefficient (–)

1

W2

CBHE

Coefficient of bottom heat exchange (W m−2 °C−1)

0.3

W2

TSED

Sediment temperature (°C)

8

W2

TSEDF

Heat lost to sediments that is added back to water column

1

W2

EXH2O

Light extinction for pure water (m−1)

0.4

W2

BETA

Fraction of incident solar radiation absorbed at the water surface

0.45

W2

BETAI

Fraction of solar radiation absorbed in the ice surface

0.6

W2

ALBEDO

Albedo of ice

0.25

  1. W2 was applied with standard settings for freshwater systems. Note that because of the characteristics of both lake models, settings for specific parameters can have slightly different values due to differences in the underlying model equations