@article{fdi:010095865,
  title = {{S}patio-temporal variability of flooded areas in the {O}ueme floodplain ({B}enin, {W}est {A}frica) from 2015 to 2023},
  author = {{F}erdinand, {N}. and {C}haigneau, {A}lexis and {K}ouraev, {A}. and {M}orel, {Y}. and {O}kpeitcha, {O}. {V}. and {B}iancamaria, {S}. and {F}errant, {S}ylvain},
  editor = {},
  language = {{ENG}},
  abstract = {{S}tudy region: {O}ueme floodplain, southern {B}enin, {W}est {A}frica. {S}tudy focus: {T}he {O}ueme floodplain is a vast hydrological system feeding the {N}okoue lagoon via the {S}o and {O}ueme rivers, crossing an extensive wetland region. {D}riven by the {A}frican monsoon, this area is marked by pronounced seasonal and interannual hydrological variability, leading to recurrent flooding that significantly threatens local communities' safety and livelihoods. {T}his study aims to assess the spatio-temporal variability of flooded areas in the {O}ueme floodplain from 2015 to 2023, using both in-situ measurements and satellite remote sensing. {N}ew hydrological insights for the region: {T}he analysis reveals a clear seasonal cycle of flooding, modulated by interannual variability. {S}entinel-1{A} data show that flood extent fluctuates widely, ranging from 20 to 160 km2, and identify the {S}o region as the most flood-prone area. {I}mportantly, the study detects a significant upward trend in flood extent over the study period. {F}lood dynamics are primarily governed by cumulative {J}anuary-{S}eptember rainfall, with a critical threshold of 1070 mm beyond which flooding expands rapidly. {A}ltimetry data further indicate that a 6 m rise in water surface elevation north of the {O}ueme river results in increased flood expansion. {T}emporary hydrological connections appear during flood events, adding complexity to floodplain hydrodynamics and enhancing connectivity across the basin. {O}verall, this study provides new insights into the mechanisms driving floods in the {O}ueme floodplain using remote sensing.},
  keywords = {{F}lood ; {F}loodplain ; {S}ynthetic aperture radar ; {R}emote sensing ; {W}est {A}frica ; {AFRIQUE} {DE} {L}'{OUEST}},
  booktitle = {},
  journal = {{J}ournal of {H}ydrology : {R}egional {S}tudies},
  volume = {62},
  numero = {},
  pages = {102965 [14 p.]},
  year = {2025},
  DOI = {10.1016/j.ejrh.2025.102965},
  URL = {https://www.documentation.ird.fr/hor/fdi:010095865},
}