@incollection{fdi:010072205,
  title = {{A}nalysis of hydrological changes and flood increase in {N}iamey based on the {PERSIANN}-{CDR} satellite rainfall estimate and hydrological simulations over the 1983-2013 period},
  author = {{C}asse, {C}. and {G}osset, {M}arielle},
  editor = {},
  language = {{ENG}},
  abstract = {{A} dramatic increase in the frequency and intensity of floods due to the {N}iger {R}iver in the city of {N}iamey ({N}iger) has been observed in the last decade. {P}revious studies highlighted the role of the land use changes on the flood increase since 1970s. {I}n the last decade, observations have raised the issue of a possible increase in extreme rainfall in the {S}ahel, which may have caused the recent and extreme floods in {N}iamey in 2010, 2012 and 2013. {T}he study focuses on the 125 000 km(2) basin between {A}nsongo and {N}iamey. {T}his is the drainage area of the monsoon rainfall that leads to the rapid flow rise occurring between {J}une and {O}ctober. {T}o understand the possible role of rainfall in flood intensification, satellite rainfall estimate is attractive in a region where the operational gauge network is sparse. {T}his paper analyses the evolution of the {N}iger hydrograph in {N}iamey based on discharge observations, hydrological modelling and the satellite product {PERSIANN}-{CDR}, over the 1983-2013 period. {PERSIANN}-{CDR} is first compared with four other rainfall products. {T}he salient features of the observed changes, i.e. a marked change in the mean decadal hydrograph, is well mimicked by the simulations, implying that rainfall is the first driver to the observed changes. {T}he increase of flooded years over the period is also well reproduced but with some uncertainties in the exact number of flood days per year.},
  keywords = {{NIGER} ; {NIAMEY}},
  booktitle = {{C}hanges in flood risk and perception in catchments and cities},
  numero = {370},
  pages = {117--123},
  address = {{G}{\¨o}ttingen},
  publisher = {{C}opernicus},
  series = {{P}roceedings of the {I}nternational {A}ssociation of {H}ydrological {S}ciences},
  year = {2015},
  DOI = {10.5194/piahs-370-117-2015},
  ISSN = {2199-899{X}},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072205},
}