@article{fdi:010073653,
  title = {{M}odelling hydrologic and hydrodynamic processes in basins with large semi-arid wetlands},
  author = {{F}leischmann, {A}. and {S}iqueira, {V}. and {P}aris, {A}. and {C}ollischonn, {W}. and {P}aiva, {R}. and {P}ontes, {P}. and {C}retaux, {J}. {F}. and {B}erge-{N}guyen, {M}. and {B}iancamaria, {S}. and {G}osset, {M}arielle and {C}almant, {S}t{\'e}phane and {T}animoun, {B}.},
  editor = {},
  language = {{ENG}},
  abstract = {{H}ydrological and hydrodynamic models are core tools for simulation of large basins and complex river systems associated to wetlands. {R}ecent studies have pointed towards the importance of online coupling strategies, representing feedbacks between floodplain inundation and vertical hydrology. {E}specially across semi-arid regions, soil-floodplain interactions can be strong. {I}n this study, we included a two-way coupling scheme in a large scale hydrological-hydrodynamic model ({MGB}) and tested different model structures, in order to assess which processes are important to be simulated in large semi-arid wetlands and how these processes interact with water budget components. {T}o demonstrate benefits from this coupling over a validation case, the model was applied to the {U}pper {N}iger {R}iver basin encompassing the {N}iger {I}nner {D}elta, a vast semi-arid wetland in the {S}ahel {D}esert. {S}imulation was carried out from 1999 to 2014 with daily {TMPA} 3{B}42 precipitation as forcing, using both in-situ and remotely sensed data for calibration and validation. {M}odel outputs were in good agreement with discharge and water levels at stations both upstream and downstream of the {I}nner {D}elta ({N}ash-{S}utcliffe {E}fficiency ({NSE}) > 0.6 for most gauges), as well as for flooded areas within the {D}elta region ({NSE} = 0.6; r = 0.85). {M}odel estimates of annual water losses across the {D}elta varied between 20.1 and 30.6 km(3)/yr, while annual evapotranspiration ranged between 760 mm/yr and 1130 mm/yr. {E}valuation of model structure indicated that representation of both floodplain channels hydrodynamics (storage, bifurcations, lateral connections) and vertical hydrological processes (floodplain water infiltration into soil column; evapotranspiration from soil and vegetation and evaporation of open water) are necessary to correctly simulate flood wave attenuation and evapotranspiration along the basin. {T}wo-way coupled models are necessary to better understand processes in large semi-arid wetlands. {F}inally, such coupled hydrologic and hydrodynamic modelling proves to be an important tool for integrated evaluation of hydrological processes in such poorly gauged, large scale basins. {W}e hope that this model application provides new ways forward for large scale model development in such systems, involving semi-arid regions and complex floodplains.},
  keywords = {{N}iger {R}iver {B}asin ; {N}iger {I}nner {D}elta ; {T}wo-way coupling ; {F}loodplain hydrodynamics ; {F}loodplain infiltration ; {S}emi-arid wetlands ; {NIGER} {COURS} {D}'{EAU} ; {NIGER} {DELTA}},
  booktitle = {},
  journal = {{J}ournal of {H}ydrology},
  volume = {561},
  numero = {},
  pages = {943--959},
  ISSN = {0022-1694},
  year = {2018},
  DOI = {10.1016/j.jhydrol.2018.04.041},
  URL = {https://www.documentation.ird.fr/hor/fdi:010073653},
}