@article{fdi:010069489,
  title = {{M}odeling surface water dynamics in the {A}mazon {B}asin using {MOSART}-{I}nundation v1.0 : impacts of geomorphological parameters and river flow representation},
  author = {{L}uo, {X}. {Y}. and {L}i, {H}. {Y}. and {L}eung, {L}. {R}. and {T}esfa, {T}. {K}. and {G}etirana, {A}. and {P}apa, {F}abrice and {H}ess, {L}. {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the {A}mazon {B}asin, floodplain inundation is a key component of surface water dynamics and plays an important role in water, energy and carbon cycles. {T}he {M}odel for {S}cale {A}daptive {R}iver {T}ransport ( {MOSART}) was extended with a macroscale inundation scheme for representing floodplain inundation. {T}he extended model, named {MOSART}- {I}nundation, was used to simulate surface hydrology of the entire {A}mazon {B}asin. {P}revious hydrologic modeling studies in the {A}mazon {B}asin identified and addressed a few challenges in simulating surface hydrology of this basin, including uncertainties of floodplain topography and channel geometry, and the representation of river flow in reaches with mild slopes. {T}his study further addressed four aspects of these challenges. {F}irst, the spatial variability of vegetationcaused biases embedded in the {H}ydro{SHEDS} digital elevation model ( {DEM}) data was explicitly addressed. {A} vegetation height map of about 1 km resolution and a land cover dataset of about 90m resolution were used in a {DEM} correction procedure that resulted in an average elevation reduction of 13.2m for the entire basin and led to evident changes in the floodplain topography. {S}econd, basin- wide empirical formulae for channel cross- sectional dimensions were refined for various subregions to improve the representation of spatial variability in channel geometry. {T}hird, the channel {M}anning roughness coefficient was allowed to vary with the chan- nel depth, as the effect of riverbed resistance on river flow generally declines with increasing river size. {L}astly, backwater effects were accounted for to better represent river flow in mild- slope reaches. {T}he model was evaluated against in situ streamflow records and remotely sensed {E}nvisat altimetry data and {G}lobal {I}nundation {E}xtent from {M}ulti- {S}atellites ( {GIEMS}) inundation data. {I}n a sensitivity study, seven simulations were compared to evaluate the impacts of the five modeling aspects addressed in this study. {T}he comparisons showed that representing floodplain inundation could significantly improve the simulated streamflow and river stages. {R}efining floodplain topography, channel geometry and {M}anning roughness coefficients, as well as accounting for backwater effects had notable impacts on the simulated surface water dynamics in the {A}mazon {B}asin. {T}he understanding obtained in this study could be helpful in improving modeling of surface hydrology in basins with evident inundation, especially at regional to continental scales.},
  keywords = {{AMAZONE} {BASSIN} ; {AMAZONIE}},
  booktitle = {},
  journal = {{G}eoscientific {M}odel {D}evelopment},
  volume = {10},
  numero = {3},
  pages = {1233--1259},
  ISSN = {1991-959{X}},
  year = {2017},
  DOI = {10.5194/gmd-10-1233-2017},
  URL = {https://www.documentation.ird.fr/hor/fdi:010069489},
}