ORCHIDEE_gmd-2018-57

This version of ORCHIDEE has been used in publication ORCHIDEE-ROUTING: A new river routing scheme using a high resolution hydrological database by Trung NGUYEN-QUANG, Jan POLCHER, Agnès DUCHARNE, Thomas ARSOUZE, Xudong ZHOU, Ana SCHNEIDER, and Lluís FITA in GMD as manuscript gmd-2018-57 << Reference to be added as soon as the manuscript is open for review >>.

Abstract

This study presents a revised river routing scheme (RRS) for the Organising Carbon and Hydrology in Dynamic Ecosystems (ORCHIDEE) land surface model. The revision is carried out to benefit from the high resolution topography provided the Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales (HydroSHEDS), processed to a resolution of approximately 1 kilometer. The RRS scheme of the ORCHIDEE uses a unit-to-unit routing concept which allows to preserve as much of the hydrological information of the HydroSHEDS as the user requires. The evaluation focuses on 12 rivers of contrasted size and climate which contribute freshwater to the Mediterranean Sea. First, the numerical aspect of the new RRS is investigated, to identify the practical configuration offering the best trade-off between computational cost and simulation quality for ensuing validations. Second, the performance of the revised scheme is evaluated against observations at both monthly and daily timescales. The new RRS captures satisfactorily the seasonal variability of river discharges, although important biases come from the water budget simulated by the ORCHIDEE model. The results highlight that realistic streamflow simulations require accurate precipitation forcing data and a precise river catchment description over a wide range of scales, as permitted by the new RRS. Detailed analyses at the daily timescale show promising performances of this high resolution RRS for replicating river flow variation at various frequencies. Eventually, this RRS is well adapted for further developments in the ORCHIDEE land surface model to assess anthropogenic impacts on river processes (e.g. damming for irrigation operation).

Code access

• See the version on the webinterface here : ​https://forge.ipsl.jussieu.fr/orchidee/browser/branches/publications/ORCHIDEE_gmd-2018-57
• Extract it on a terminal as follow, type anonymous as password:

  svn co --username anonymous svn://forge.ipsl.jussieu.fr/orchidee/branches/publications/ORCHIDEE_gmd-2018-57 ORCHIDEE
  

Metadata

DOI	TBD
Creator	Trung NGUYEN-QUANG, Jan POLCHER, Agnès DUCHARNE, Thomas ARSOUZE, Xudong ZHOU, Ana SCHNEIDER, and Lluís FITA
Affiliation	LMD/IPSL, METIS/IPSL
Title	ORCHIDEE-ROUTING: A new river routing scheme using a high resolution hydrological database
Publisher	Institut Pierre Simon Laplace (IPSL)
PublicationYear	2018
ResourceType	Software
Rights	This software is distributed under the CeCILL license
rightsURI	​http://www.cecill.info/
Subject	Land surface model, Hydrology, River discharge
DataManager	Karim Ramage (IPSL)
DataCurator	Josefine Ghattas (IPSL)
ContactPerson	Jan Polcher (LMD/IPSL)
FundingReference	Ecole Polytechnique, CNRS, Université Pierre et Marie Curie