HydroBlocks v0.2: enabling a field-scale two-way coupling between the land surface and river networks in Earth system models

<p>Over the past decade, there has been appreciable progress towards modeling the water, energy, and carbon cycles at field scales (10–100 m) over continental to global extents in Earth system models (ESMs). One such approach, named HydroBlocks, accomplishes this task while maintaining computa...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	N. W. Chaney, L. Torres-Rojas, N. Vergopolan, C. K. Fisher
Formato:	article
Lenguaje:	EN
Publicado:	Copernicus Publications 2021
Materias:	Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/01a44167dba947108cba14337e60be0e
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:01a44167dba947108cba14337e60be0e
record_format	dspace
spelling	oai:doaj.org-article:01a44167dba947108cba14337e60be0e2021-11-09T08:28:19ZHydroBlocks v0.2: enabling a field-scale two-way coupling between the land surface and river networks in Earth system models10.5194/gmd-14-6813-20211991-959X1991-9603https://doaj.org/article/01a44167dba947108cba14337e60be0e2021-11-01T00:00:00Zhttps://gmd.copernicus.org/articles/14/6813/2021/gmd-14-6813-2021.pdfhttps://doaj.org/toc/1991-959Xhttps://doaj.org/toc/1991-9603<p>Over the past decade, there has been appreciable progress towards modeling the water, energy, and carbon cycles at field scales (10–100 m) over continental to global extents in Earth system models (ESMs). One such approach, named HydroBlocks, accomplishes this task while maintaining computational efficiency via Hydrologic Response Units (HRUs), more commonly known as “tiles” in ESMs. In HydroBlocks, these HRUs are learned via a hierarchical clustering approach from available global high-resolution environmental data. However, until now there has yet to be a river routing approach that is able to leverage HydroBlocks' approach to modeling field-scale heterogeneity; bridging this gap will make it possible to more formally include riparian zone dynamics, irrigation from surface water, and interactive floodplains in the model. This paper introduces a novel dynamic river routing scheme in HydroBlocks that is intertwined with the modeled field-scale land surface heterogeneity. Each macroscale polygon (a generalization of the concept of macroscale grid cell) is assigned its own fine-scale river network that is derived from very high resolution (<span class="inline-formula">∼</span> 30 m) digital elevation models (DEMs); the inlet–outlet reaches of a domain's macroscale polygons are then linked to assemble a full domain's river network. The river dynamics are solved at the reach-level via the kinematic wave assumption of the Saint-Venant equations. Finally, a two-way coupling between each HRU and its corresponding fine-scale river reaches is established. To implement and test the novel approach, a 1.0<span class="inline-formula"><sup>∘</sup></span> bounding box surrounding the Atmospheric Radiation and Measurement (ARM) Southern Great Plains (SGP) site in northern Oklahoma (United States) is used. The results show (1) the implementation of the two-way coupling between the land surface and the river network leads to appreciable differences in the simulated spatial heterogeneity of the surface energy balance, (2) a limited number of HRUs (<span class="inline-formula">∼</span> 300 per 0.25<span class="inline-formula"><sup>∘</sup></span> cell) are required to approximate the fully distributed simulation adequately, and (3) the surface energy balance partitioning is sensitive to the river routing model parameters. The resulting routing scheme provides an effective and efficient path forward to enable a two-way coupling between the high-resolution river networks and state-of-the-art tiling schemes in ESMs.</p>N. W. ChaneyL. Torres-RojasN. VergopolanC. K. FisherCopernicus PublicationsarticleGeologyQE1-996.5ENGeoscientific Model Development, Vol 14, Pp 6813-6832 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geology QE1-996.5
spellingShingle	Geology QE1-996.5 N. W. Chaney L. Torres-Rojas N. Vergopolan C. K. Fisher HydroBlocks v0.2: enabling a field-scale two-way coupling between the land surface and river networks in Earth system models
description	<p>Over the past decade, there has been appreciable progress towards modeling the water, energy, and carbon cycles at field scales (10–100 m) over continental to global extents in Earth system models (ESMs). One such approach, named HydroBlocks, accomplishes this task while maintaining computational efficiency via Hydrologic Response Units (HRUs), more commonly known as “tiles” in ESMs. In HydroBlocks, these HRUs are learned via a hierarchical clustering approach from available global high-resolution environmental data. However, until now there has yet to be a river routing approach that is able to leverage HydroBlocks' approach to modeling field-scale heterogeneity; bridging this gap will make it possible to more formally include riparian zone dynamics, irrigation from surface water, and interactive floodplains in the model. This paper introduces a novel dynamic river routing scheme in HydroBlocks that is intertwined with the modeled field-scale land surface heterogeneity. Each macroscale polygon (a generalization of the concept of macroscale grid cell) is assigned its own fine-scale river network that is derived from very high resolution (<span class="inline-formula">∼</span> 30 m) digital elevation models (DEMs); the inlet–outlet reaches of a domain's macroscale polygons are then linked to assemble a full domain's river network. The river dynamics are solved at the reach-level via the kinematic wave assumption of the Saint-Venant equations. Finally, a two-way coupling between each HRU and its corresponding fine-scale river reaches is established. To implement and test the novel approach, a 1.0<span class="inline-formula"><sup>∘</sup></span> bounding box surrounding the Atmospheric Radiation and Measurement (ARM) Southern Great Plains (SGP) site in northern Oklahoma (United States) is used. The results show (1) the implementation of the two-way coupling between the land surface and the river network leads to appreciable differences in the simulated spatial heterogeneity of the surface energy balance, (2) a limited number of HRUs (<span class="inline-formula">∼</span> 300 per 0.25<span class="inline-formula"><sup>∘</sup></span> cell) are required to approximate the fully distributed simulation adequately, and (3) the surface energy balance partitioning is sensitive to the river routing model parameters. The resulting routing scheme provides an effective and efficient path forward to enable a two-way coupling between the high-resolution river networks and state-of-the-art tiling schemes in ESMs.</p>
format	article
author	N. W. Chaney L. Torres-Rojas N. Vergopolan C. K. Fisher
author_facet	N. W. Chaney L. Torres-Rojas N. Vergopolan C. K. Fisher
author_sort	N. W. Chaney
title	HydroBlocks v0.2: enabling a field-scale two-way coupling between the land surface and river networks in Earth system models
title_short	HydroBlocks v0.2: enabling a field-scale two-way coupling between the land surface and river networks in Earth system models
title_full	HydroBlocks v0.2: enabling a field-scale two-way coupling between the land surface and river networks in Earth system models
title_fullStr	HydroBlocks v0.2: enabling a field-scale two-way coupling between the land surface and river networks in Earth system models
title_full_unstemmed	HydroBlocks v0.2: enabling a field-scale two-way coupling between the land surface and river networks in Earth system models
title_sort	hydroblocks v0.2: enabling a field-scale two-way coupling between the land surface and river networks in earth system models
publisher	Copernicus Publications
publishDate	2021
url	https://doaj.org/article/01a44167dba947108cba14337e60be0e
work_keys_str_mv	AT nwchaney hydroblocksv02enablingafieldscaletwowaycouplingbetweenthelandsurfaceandrivernetworksinearthsystemmodels AT ltorresrojas hydroblocksv02enablingafieldscaletwowaycouplingbetweenthelandsurfaceandrivernetworksinearthsystemmodels AT nvergopolan hydroblocksv02enablingafieldscaletwowaycouplingbetweenthelandsurfaceandrivernetworksinearthsystemmodels AT ckfisher hydroblocksv02enablingafieldscaletwowaycouplingbetweenthelandsurfaceandrivernetworksinearthsystemmodels
_version_	1718441170414075904

HydroBlocks v0.2: enabling a field-scale two-way coupling between the land surface and river networks in Earth system models

Ejemplares similares