Hydrological performance of gridded meteorological products in Peruvian Altiplano basins
Gridded meteorological datasets represent a valuable alternative for hydrometeorological applications, especially in areas with limited ground observations. However, it is important to evaluate these datasets to quantify their accuracy, error, and bias in estimates. The objective of this research wa...
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Brazilian Journal of Water Resources
2025
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| author | Lujano, Efrain Diaz Aguilar, Renny Daniel Lujano, Rene Sanchez-Delgado, Miguel Lujano, Apolinario |
| author_browse | Diaz Aguilar, Renny Daniel Lujano, Apolinario Lujano, Efrain Lujano, Rene Sanchez-Delgado, Miguel |
| author_facet | Lujano, Efrain Diaz Aguilar, Renny Daniel Lujano, Rene Sanchez-Delgado, Miguel Lujano, Apolinario |
| author_sort | Lujano, Efrain |
| collection | Producción científica |
| description | Gridded meteorological datasets represent a valuable alternative for hydrometeorological applications, especially in areas with limited ground observations. However, it is important to evaluate these datasets to quantify their accuracy, error, and bias in estimates. The objective of this research was to assess the hydrological performance of gridded meteorological products in Peruvian Altiplano basins. Three evaluation approaches were employed: 1) pixel-to-point, 2) basin-averaged values, and 3) as forcings in hydrological modeling. Using precipitation (P) and potential evapotranspiration (PET) data from AgERA5, ERA5-Land, MERRA-2, and PERSIANN-CDR, comparisons were made with 33 local meteorological stations using statistical metrics such as correlation coefficient (CC), root mean square error (RMSE), and percentage bias (PBIAS). Additionally, the GR4J hydrological model was employed in four watersheds to assess model performance with different data combinations. Results showed that AgERA5 and ERA5-Land excelled in daily precipitation estimation, while MERRA-2 had the lowest PET bias. Using reference data for P and PET as model forcings yielded consistent results across basins. However, the performance declined when using gridded products for both P and PET, revealing significant limitations in replicating hydrological processes and emphasizing the need to enhance these products for areas with limited observational data. |
| format | Article |
| id | oai:cris.upeu.edu.pe:20.500.15037/2872 |
| institution | UPeU |
| language | English |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Brazilian Journal of Water Resources |
| publisherStr | Brazilian Journal of Water Resources |
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| spelling | oai:cris.upeu.edu.pe:20.500.15037/28722026-10-30T16:19:01ZHydrological performance of gridded meteorological products in Peruvian Altiplano basinsDesempenho hidrológico de produtos meteorológicos em grade nas bacias do Altiplano peruanoLujano, EfrainDiaz Aguilar, Renny DanielLujano, ReneSanchez-Delgado, MiguelLujano, ApolinarioAgERA5Peruvian plateauERA5-LandGR4J hydrological modelMERRA-2PERSIANN-CDRTiticaca hydrographic regionGridded meteorological datasets represent a valuable alternative for hydrometeorological applications, especially in areas with limited ground observations. However, it is important to evaluate these datasets to quantify their accuracy, error, and bias in estimates. The objective of this research was to assess the hydrological performance of gridded meteorological products in Peruvian Altiplano basins. Three evaluation approaches were employed: 1) pixel-to-point, 2) basin-averaged values, and 3) as forcings in hydrological modeling. Using precipitation (P) and potential evapotranspiration (PET) data from AgERA5, ERA5-Land, MERRA-2, and PERSIANN-CDR, comparisons were made with 33 local meteorological stations using statistical metrics such as correlation coefficient (CC), root mean square error (RMSE), and percentage bias (PBIAS). Additionally, the GR4J hydrological model was employed in four watersheds to assess model performance with different data combinations. Results showed that AgERA5 and ERA5-Land excelled in daily precipitation estimation, while MERRA-2 had the lowest PET bias. Using reference data for P and PET as model forcings yielded consistent results across basins. However, the performance declined when using gridded products for both P and PET, revealing significant limitations in replicating hydrological processes and emphasizing the need to enhance these products for areas with limited observational data.Article10.1590/2318-0331.3025202400682-s2.0-85218806105https://hdl.handle.net/20.500.15037/2872enRevista Brasileira de Recursos HídricosRevista Brasileira de Recursos Hidricos1414-381X2318-0331Brazilian Journal of Water Resources2025-01-012026-06-27T02:34:26Z2026-06-27T02:34:26Z |
| spellingShingle | AgERA5 Peruvian plateau ERA5-Land GR4J hydrological model MERRA-2 PERSIANN-CDR Titicaca hydrographic region Lujano, Efrain Diaz Aguilar, Renny Daniel Lujano, Rene Sanchez-Delgado, Miguel Lujano, Apolinario Hydrological performance of gridded meteorological products in Peruvian Altiplano basins |
| title | Hydrological performance of gridded meteorological products in Peruvian Altiplano basins |
| title_full | Hydrological performance of gridded meteorological products in Peruvian Altiplano basins |
| title_fullStr | Hydrological performance of gridded meteorological products in Peruvian Altiplano basins |
| title_full_unstemmed | Hydrological performance of gridded meteorological products in Peruvian Altiplano basins |
| title_short | Hydrological performance of gridded meteorological products in Peruvian Altiplano basins |
| title_sort | hydrological performance of gridded meteorological products in peruvian altiplano basins |
| topic | AgERA5 Peruvian plateau ERA5-Land GR4J hydrological model MERRA-2 PERSIANN-CDR Titicaca hydrographic region |
| topic_facet | AgERA5 Peruvian plateau ERA5-Land GR4J hydrological model MERRA-2 PERSIANN-CDR Titicaca hydrographic region |
| url | https://hdl.handle.net/20.500.15037/2872 |
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