@article{fdi:010062463,
  title = {{L}ong-term increase in diffuse groundwater recharge following expansion of rainfed cultivation in the {S}ahel, {W}est {A}frica},
  author = {{I}brahim, {M}. and {F}avreau, {G}uillaume and {S}canlon, {B}. {R}. and {S}eidel, {J}. {L}. and {L}e {C}oz, {M}. and {D}emarty, {J}{\'e}rome and {C}appelaere, {B}ernard},
  editor = {},
  language = {{ENG}},
  abstract = {{R}apid population growth in sub-{S}aharan {W}est {A}frica and related cropland expansion were shown in some places to have increased focused recharge through ponds, raising the water table. {T}o estimate changes in diffuse recharge, the water content and matric potential were monitored during 2009 and 2010, and modeling was performed using the {H}ydrus-1{D} code for two field sites in southwest {N}iger: (1) fallow land and (2) rainfed millet cropland. {M}onitoring results of the upper 10 m showed increased water content and matric potential to greater depth under rainfed cropland (> 2.5 m) than under fallow land (a parts per thousand currency sign1.0 m). {M}odel simulations indicate that conversion from fallow land to rainfed cropland (1) increases vadose-zone water storage and (2) should increase drainage flux (similar to 25 mm year(-1)) at 10-m depth after a 30-60 year lag. {T}herefore, observed regional increases in groundwater storage may increasingly result from diffuse recharge, which could compensate, at least in part, groundwater withdrawal due to observed expansion in irrigated surfaces; and hence, contribute to mitigate food crises in the {S}ahel.},
  keywords = {{L}and-use change ; {S}emiarid region ; {U}nsaturated zone ; {N}umerical modeling ; {N}iger ; {NIGER}},
  booktitle = {},
  journal = {{H}ydrogeology {J}ournal},
  volume = {22},
  numero = {6},
  pages = {1293--1305},
  ISSN = {1431-2174},
  year = {2014},
  DOI = {10.1007/s10040-014-1143-z},
  URL = {https://www.documentation.ird.fr/hor/fdi:010062463},
}