@article{fdi:010082232, title = {{H}ydro-climatology study of the {O}gooue {R}iver basin using hydrological modeling and satellite altimetry}, author = {{B}ogning, {S}. and {F}rappart, {F}. and {P}aris, {A}. and {B}larel, {F}. and {N}ino, {F}ernando and {P}icart, {S}. {S}. and {L}anet, {P}. and {S}eyler, {F}r{\'e}d{\'e}rique and {M}ah{\'e}, {G}il and {O}nguene, {R}. and {B}ricquet, {J}ean-{P}ierre and {E}tame, {J}. and {P}aiz, {M}. {C}. and {B}raun, {J}ean-{J}acques}, editor = {}, language = {{ENG}}, abstract = {{H}ydrological models are important tools for the simulation of water storage and hydrological fluxes in large basins and complex river systems. {T}he hydrological models can compensate the lack of observed data in ungauged basins. {I}n this study, the hydrological model of large basins {MGB} (for {M}odel of {L}arge {B}asins in {P}ortuguese) is used to evaluate the hydrological processes of the {O}gooue' {R}iver {B}asin ({ORB}), which has been mostly unmonitored for about three decades. {S}imulations were carried out over an 18-year period from 1998 to 2015 using {TRMM} 3{B}42 daily rainfall data from the {T}ropical {R}ainfall {M}easurement {M}ission ({TRMM}) as forcing and in situ and altimetry-based river discharges from {E}nvisat, {S}aral {A}ltika and {J}ason-2 for calibration and validation. {T}he results of the model were in good agreement with the flows measured at stations upstream and downstream of the {O}gooue' basin ({N}ash-{S}utcliffe {E}fficiency ({NSE}) > 0.56 for all calibration gauges). {T}he {MGB} model efficiently describes the seasonal and interannual variations of the flow in the {O}gooue ' {R}iver and its major tributaries which were found to be highly correlated to the rainfall (r ranging from 0.72 to 0.90 and 0.56 to 0.87 at seasonal and interannual time-scales respectively). {I}nterannual variations of precipitation and river discharge of the {ORB} are linked to the {E}l {N}ino {S}outhern {O}scillation ({ENSO}) in the tropical eastern {P}acific {O}cean and southeastern tropical {A}tlantic {N}ino. {A}lso, the {O}gooue' {R}iver discharge was found to be strongly correlated with {S}ea {S}urface {T}emperature ({SST}) at annual and semi-annual time-scales.}, keywords = {{A}ltimetry ; {ENSO} ; {MGB} model ; {R}ainfall variability ; {R}iver discharge ; {T}ropical {A}tlantic {N}ino ; {GABON} ; {OGOOUE} {BASSIN}}, booktitle = {}, journal = {{A}dvances in {S}pace {R}esearch}, volume = {68}, numero = {2}, pages = {672--690}, ISSN = {0273-1177}, year = {2021}, DOI = {10.1016/j.asr.2020.03.045}, URL = {https://www.documentation.ird.fr/hor/fdi:010082232}, }