Model:River Temperature Model

River Temperature Model

Metadata

Also known as	River Temperature
Model type	Single
Model part of larger framework	permafrost toolbox
Note on status model
Date note status model

Incorporated models or components:

Spatial dimensions	1D, 1.5D
Spatial extent	Reach-Scale
Model domain	Terrestrial, Hydrology
One-line model description	River Temperature Model based on heat balance approach
Extended model description	The river water temperature model is designed to be applied in Arctic rivers. Heat energy transfers considered include surface net solar radiation, net longwave radiation, latent heat due to evaporation and condensation, convective heat and the riverbed heat flux. The model is explicitly designed to interact with a permafrost channelbed and frozen conditions through seasonal cycles. In addition to the heat budget, river discharge, or stage, drives the model.

Keywords:	permafrost, river discharge, river,

Name	Irina Overeem
Type of contact	Project manager
Institute / Organization	University of Colorado
Postal address 1	4001 Discovery DR
Postal address 2
Town / City	Boulder
Postal code	80303
State	Colorado
Country	United States
Email address	irina.overeem@colorado.edu
Phone
Fax

Name	Lei Zheng
Type of contact	Model developer
Institute / Organization	Wuhan University
Postal address 1
Postal address 2
Town / City
Postal code
State
Country	China
Email address	zhenglei007@whu.edu.cn
Phone
Fax

Supported platforms	Mac OS
Other platform
Programming language	Python, Matlab
Other program language
Code optimized	Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development	2018
Does model development still take place?	Yes
If above answer is no, provide end year model development
Code development status	Active
When did you indicate the 'code development status'?	2020
Model availability	As code
Source code availability (Or provide future intension)	Through web repository
Source web address	https://github.com/permamodel/River-temp-python
Source csdms web address
Program license type	GPL v3
Program license type other
Memory requirements
Typical run time

Describe input parameters	climatology
Input format	ASCII
Other input format	mfile.txt
Describe output parameters	daily river temperature
Output format	ASCII
Other output format
Pre-processing software needed?	No
Describe pre-processing software
Post-processing software needed?	No
Describe post-processing software
Visualization software needed?	No
If above answer is yes
Other visualization software

Describe processes represented by the model	[[Describe processes::River temp is a one-dimensional heat-balance model to simulate water temperature driven by atmospheric and hydrologic observations. Heat fluxes considered in the model include: net surface shortwave solar radiation, net longwave radiation, latent heat due to evaporation and condensation, convective heat, and riverbed heat flux following [Hebert et al., 2011].]]
Describe key physical parameters and equations	[[Describe key physical parameters::Surface net solar radiation at the water surface is expressed as the direct solar irradiance penetrating the water surface, i.e., the difference between incoming solar radiation and reflected solar radiation, taking into account albedo of the river water. Longwave radiation includes the radiation emitted by the atmosphere, water surface, and vegetation. We assume the vegetation canopy effect is negligible for the Arctic river floodplains. Net longwave radiation at the water surface is then the difference between atmospheric downward longwave radiation and the longwave radiation emitted from the water surface. Latent heat Hl contributed by evaporation or condensation at the air-water interface can be expressed by the following equation [Hebert et al., 2011]. The heat flux between river water and the riverbed is potentially a significant control on water temperature, especially in shallow rivers, and perhaps even more so in rivers in permafrost terrain. Riverbed heat flux consists of the amount of solar radiation absorbed by the bed material and the thermal conduction into the riverbed [Webb & Zhang, 1997]]]
Describe length scale and resolution constraints	Model is 1D, we have used it over a x-section of a floodplain with varying flood inundation depth and durations.
Describe time scale and resolution constraints	Daily timesteps
Describe any numerical limitations and issues

Describe available calibration data sets	Tested against river temperature observations of the Kuparuk river on the North Slope of Alaska (described in Zheng et al., 2019).
Upload calibration data sets if available:
Describe available test data sets	water temperature measurements over summer seasons of 2014-2016
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Describe ideal data for testing

Do you have current or future plans for collaborating with other researchers?	We intent to apply this model to the Canning River, AK with collaborators of the USGS/Alaska Science Center.

Is there a manual available?	No
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Model website if any
Model forum / discussion board

Comments	Zheng, L., Overeem, I., Wang, K., Clow, G., (2019). Changing Arctic River Dynamics Cause Localized Permafrost Thaw, Journal of Geophysical Research – Earth Surface. https://doi.org/10.1029/2019JF005060.

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OpenMI compliant
BMI compliant	No but possible
WMT component	No not possible
PyMT component	No but possible
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Can be coupled with:	CVPM,

Model info

Authors

Irina Overeem

Zheng

Source code

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Model citations

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Total citations:	0
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m-quotient:	0

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Featured publication(s)	Year	Model described	Type of Reference	Citations
Zheng, Lei; Overeem, Irina; Wang, Kang; Clow, Gary D.; 2019. Changing Arctic River Dynamics Cause Localized Permafrost Thaw. Journal of Geophysical Research: Earth Surface, 124, 2324–2344. 10.1029/2019JF005060 (View/edit entry)	2019	CVPM River Temperature Model	Related theory	26
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