Sensitivity of global hydrological models to potential evapotranspiration estimation methods in the Senegal River Basin (West Africa)

• DOI: 10.1016/j.ejrh.2024.101823
• Publication Date: 2024-05-18T11:09:01Z
• Authors: Papa Malick Ndiaye; Ansoumana Bodian; Alain Dezetter; Andrew Ogilvie; Omar Goudiaby
• Keywords: Physical geography; QE1-996.5; 550; 590; 0207 environmental engineering; Geology; 02 engineering and technology; 551; GB3-5030; Sensitivity; Sensitivity Analysis; Senegal River Basin; [SDU.STU.HY] Sciences of the Universe [physics]/Earth Sciences/Hydrology; [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology; Global Hydrological models; Evapotranspiration methods; Analysis

Senegal River Basin in West Africa This paper aims to evaluate the sensitivity of global hydrological models potential evapotranspiration (PET) methods Basin. Potential is estimated using 21 and its influence on performance three GR (GR4J, GR5J GR6J) investigated five catchments. The data used are mean rainfall, discharge observed calculated PET over period 1984–1995. based climate those from NASA POWER reanalysis data. methodology consists in: (i) comparing consistency with respect PET, (ii) assessing robustness their different estimation methods. evaluation criteria assess model KGE PBIAS. Good obtained between GR4J more efficient simulate flows sub-basins. aerodynamic perform well models. However, this context where scarce, temperature such as Droogers Allen a good choice for modeling. results also show that have ability adapt poorly PET.