@article{fdi:010088017,
  title = {{S}atellite-based rainfall estimates to simulate daily streamflow using a hydrological model over {G}ambia watershed},
  author = {{F}aty, {B}. and {S}terk, {G}. and {A}lid, {A}. and {S}y, {S}. and {D}acosta, {H}. and {D}iop, {S}. and {D}escroix, {L}uc},
  editor = {},
  language = {{ENG}},
  abstract = {{S}atellite rainfall products ({SRP}s) have the potential to overcome the limitations of ground-based rainfall observations and provide an alternative to inadequately or ungauged watersheds. {H}owever, due to the relatively poor accuracy and associated uncertainties to {SRP}s, it is necessary to evaluate their quality and applicability for each investigated watershed. {T}his paper evaluates the usefulness of {SRP}s as forcing data for hydrological modeling under different scenarios and assesses their applicability for the {K}edougou, {M}ako and {S}imenti sub-basins of the {G}ambia {R}iver. {T}o achieve this, the "{G}{\'e}nie {R}ural {\`a} 4 param{\`e}tres {J}ournalier model" ({GR}4{J}) hydrological model was employed to simulate the streamflow considering four different scenarios: i) non-calibrated {GR}4{J} model run with uncorrected {SRP}s ({S}cenario 1); ii) non-calibrated model run with corrected {SRP}s ({S}cenario 2); {GR}4{J} model was calibrated and validated using uncorrected {SRP}s, and then they were utilized to drive the model ({S}cenario 3); {GR}4{J} model was calibrated and validated and then run using forcing inputs from corrected {SRP}s ({S}cenario 4). {R}esults revealed that under {S}cenario 1 the {SRP}s performed poorly over the three sub-basins, while under scenario 2, the simulated daily streamflows showed relative improvement when run using corrected {SRP}s with 6 or 10 rainfall stations. {U}nder the scenarios 3 and 4, the calibrated model provides significant improvement of the simulated streamflow with both the corrected and non-corrected {SRP}s. {F}inally, the {SRP}s demonstrate potential for use in watersheds where there are no rain gauges. {T}he performance loss from scenario 4 (considered as the reference) to scenario 3 does not exceed 20%. {S}imilarly, the performance loss from scenario 4 to scenario 2 does not exceed 50% when the {SRP}s are corrected using 3 and 6 rainfall stations (e.g., in the {K}edougou sub-basin). {T}hus, they can be considered acceptable for hydrological simulations when the hydrological model is calibrated with measured streamflow.},
  keywords = {{AFRIQUE} {DE} {L}'{OUEST} ; {GAMBIE} {BASSIN}},
  booktitle = {},
  journal = {{W}ater {S}cience},
  volume = {37},
  numero = {1},
  pages = {1--18},
  ISSN = {2357-0008},
  year = {2023},
  DOI = {10.1080/23570008.2023.2225898},
  URL = {https://www.documentation.ird.fr/hor/fdi:010088017},
}