Preprints
https://doi.org/10.5194/egusphere-2024-587
https://doi.org/10.5194/egusphere-2024-587
19 Mar 2024
 | 19 Mar 2024

Optimizing WRF-Hydro Calibration in the Himalayan Basin: Precipitation Influence and Parameter Sensitivity Analysis

Ankur Dixit, Sandeep Sahany, Flavio Lehner, and Saroj Kanta Mishra

Abstract. Lack of in-situ observations and reliable climate information in large part of the Himalayas poses a significant challenges for assessing water resources vulnerability accurately. Further, the reliance on only a few coarse resolution gridded datasets with considerable uncertainty complicates this problem. However, integrated hydrometeorological modeling systems, like WRF-Hydro, have the potential to provide information in such ungauged or poorly observed regions, yet they require careful calibration. Here, we calibrate and assess the fidelity of WRF-Hydro in simulating the hydrological regime of the Beas basin. Selected WRF-Hydro model parameters are calibrated using the PEST framework, using eight simulations with two meteorological forcings from two WRF realisations. Model calibration improves the accuracy of the basin discharge simulation, however the choice of precipitation forcing is also critically important. We propose an ensemble weighting scheme to optimize an intra-annual tradeoff between streamflow under- and overestimation in different WRF-Hydro configurations. This study demonstrate the efficacy of using coupled (offline) WRF and WRF-Hydro for providing climate change impact-relevant information in data-sparse basins.

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.
Ankur Dixit, Sandeep Sahany, Flavio Lehner, and Saroj Kanta Mishra

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-587', Anonymous Referee #1, 05 Apr 2024
    • AC2: 'Reply on RC1', Ankur Dixit, 10 Jun 2024
  • RC2: 'Comment on egusphere-2024-587', Anonymous Referee #2, 20 Apr 2024
    • AC1: 'Reply on RC2', Ankur Dixit, 10 Jun 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-587', Anonymous Referee #1, 05 Apr 2024
    • AC2: 'Reply on RC1', Ankur Dixit, 10 Jun 2024
  • RC2: 'Comment on egusphere-2024-587', Anonymous Referee #2, 20 Apr 2024
    • AC1: 'Reply on RC2', Ankur Dixit, 10 Jun 2024
Ankur Dixit, Sandeep Sahany, Flavio Lehner, and Saroj Kanta Mishra
Ankur Dixit, Sandeep Sahany, Flavio Lehner, and Saroj Kanta Mishra

Viewed

Total article views: 544 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
363 156 25 544 39 14 16
  • HTML: 363
  • PDF: 156
  • XML: 25
  • Total: 544
  • Supplement: 39
  • BibTeX: 14
  • EndNote: 16
Views and downloads (calculated since 19 Mar 2024)
Cumulative views and downloads (calculated since 19 Mar 2024)

Viewed (geographical distribution)

Total article views: 558 (including HTML, PDF, and XML) Thereof 558 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 20 Nov 2024
Download
Short summary
This study calibrates WRF-Hydro in a Himalayan basin, finding precipitation choice significantly influences results over parameter sets. Study highlights the importance of tailored calibration strategies and parameter sensitivity analyses for accurate streamflow predictions in Himalayan basins, crucial for effective water resource management.