Preprints
https://doi.org/10.5194/gmd-2023-213
https://doi.org/10.5194/gmd-2023-213
Submitted as: model description paper
 | 
20 Nov 2023
Submitted as: model description paper |  | 20 Nov 2023
Status: a revised version of this preprint was accepted for the journal GMD and is expected to appear here in due course.

The global water resources and use model WaterGAP v2.2e: description and evaluation of modifications and new features

Hannes Müller Schmied, Tim Trautmann, Sebastian Ackermann, Denise Cáceres, Martina Flörke, Helena Gerdener, Ellen Kynast, Thedini Asali Peiris, Leonie Schiebener, Maike Schumacher, and Petra Döll

Abstract. Water – Global Assessment and Prognosis (WaterGAP) is a modelling approach for quantifying water resources and water use for all land areas of the Earth that has served science and society since 1996. In this paper, the refinements, new algorithms and new data of the most recent model version v2.2e are described, together with a thorough evaluation of simulated water use, streamflow and total water storage anomaly against observation data. WaterGAP v2.2e improves the handling of inland sinks and now excludes not only large but also small man-made reservoirs when simulating naturalized conditions. The reservoir and non-irrigation water use data were updated. In addition, the model was calibrated against an updated and extended dataset of streamflow observations at 1509 gauging stations. The model can now be started using pre-scribed water storages and other conditions, which facilitates data assimilation as well as near real-time monitoring and forecast simulations. For specific applications, the model can consider the output of a glacier model, approximate the effect of rising CO2 concentrations on evapotranspiration or calculate the water temperature in rivers. In the paper, the publicly available standard model output is described and caveats of the model version are provided alongside the description of the model setup in the ISIMIP3 framework.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Hannes Müller Schmied, Tim Trautmann, Sebastian Ackermann, Denise Cáceres, Martina Flörke, Helena Gerdener, Ellen Kynast, Thedini Asali Peiris, Leonie Schiebener, Maike Schumacher, and Petra Döll

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2023-213', Anonymous Referee #1, 18 Jan 2024
  • RC2: 'Comment on gmd-2023-213', Anonymous Referee #2, 09 Apr 2024
  • AC3: 'General reply', Hannes Müller Schmied, 07 Jun 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2023-213', Anonymous Referee #1, 18 Jan 2024
  • RC2: 'Comment on gmd-2023-213', Anonymous Referee #2, 09 Apr 2024
  • AC3: 'General reply', Hannes Müller Schmied, 07 Jun 2024
Hannes Müller Schmied, Tim Trautmann, Sebastian Ackermann, Denise Cáceres, Martina Flörke, Helena Gerdener, Ellen Kynast, Thedini Asali Peiris, Leonie Schiebener, Maike Schumacher, and Petra Döll

Data sets

The global water resources and use model WaterGAP v2.2d - model output driven by gswp3-w5e5 and historical setup of direct human impacts H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.25716/GUDE.1PQV-6477

The global water resources and use model WaterGAP v2.2d - model output driven by gswp3-w5e5 and neglecting direct human impacts H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.25716/GUDE.0G5P-XSKK

The global water resources and use model WaterGAP v2.2e - model output driven by gswp3-w5e5 and historical setup of direct human impacts H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.25716/GUDE.0TNY-KJPG

The global water resources and use model WaterGAP v2.2e - model output driven by gswp3-w5e5 and neglecting direct human impacts H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.25716/GUDE.0PZW-2TVK

The global water resources and use model WaterGAP v2.2e - model output driven by 20crv3-w5e5 and historical setup of direct human impacts H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.25716/GUDE.0K1D-ZTH5

The global water resources and use model WaterGAP v2.2e - model output driven by 20crv3-w5e5 and neglecting direct human impacts H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.25716/GUDE.1C8E-77CV

The global water resources and use model WaterGAP v2.2e - model output driven by 20crv3-era5 and historical setup of direct human impacts H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.25716/GUDE.1TA7-3F5W

The global water resources and use model WaterGAP v2.2e - model output driven by 20crv3-era5 and neglecting direct human impacts H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.25716/GUDE.142E-65P$

The global water resources and use model WaterGAP v2.2e - model output driven by gswp3-era5 and historical setup of direct human impacts H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.25716/GUDE.1Q7K-2GWV

The global water resources and use model WaterGAP v2.2e - model output driven by gswp3-era5 and neglecting direct human impacts H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.25716/GUDE.0WKZ-74YD

Model code and software

WaterGAP v2.2e H. Müller Schmied, T. Trautmann, S. Ackermann, D. Cáceres, M. Flörke, H. Gerdener, E. Kynast, T. A. Peiris, L. Schiebener, M. Schumacher, and P. Döll https://doi.org/10.5281/ZENODO.10026943

Hannes Müller Schmied, Tim Trautmann, Sebastian Ackermann, Denise Cáceres, Martina Flörke, Helena Gerdener, Ellen Kynast, Thedini Asali Peiris, Leonie Schiebener, Maike Schumacher, and Petra Döll

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Short summary
Assessing water availability and water use at the global scale is challenging but essential for a range of purposes. We describe the newest version of the global hydrological model WaterGAP which has been used for numerous water resources assessments since 1996. We show the effects of new model features and model evaluations against observed streamflow and water storage anomalies as well as water abstractions statistics. The publically available model output for several variants is described.