@article{fdi:010018928,
  title = {{W}ater balance in a banded vegetation pattern : a case study of tiger bush in {W}estern {N}iger},
  author = {{G}alle, {S}ylvie and {E}hrmann, {M}. and {P}eugeot, {C}hristophe},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he tiger bush is a patterned woodland with alternating bare area and vegetated stripes. {I}n {N}iger, it covers one third of the {S}ahelian zone. {T}hese natural forests are of considerable economical interest since they are the main source of livestock forage and domestic energy. {I}ts sustainable exploitation needs improved understanding of its dynamics. {T}he redistribution of water between thicket and intervening bare areas is decisive for the water supply of the vegetation. {T}iger bush patterning replicates an elementary unit composed of a bare area, the upslope border, the core and the downslope margin of the thicket. ({E}ach zone of tiger bush is characterised by specific soil crusting associated with vegetation). {B}oth water storage and runoff have been monitored after each rain, over a period of 4 yr, including contrasting rainy seasons, on the different zones composing the tiger bush. {O}n the three crusted zones, runoff has a piecewise linear relationship with rain : on closed plots, runoff yield vs. annual rainfall ratio reaches 54% on bare soil, 2% on upslope border and 18% on downslope border. {T}he measured infiltration confirms these rates on independent plots. {I}n the core of thicket, measured infiltration corresponds with the sum of the contributions of upslope zones, weighted by their relative lengths. {T}his model predicts that bare area contributes up to 62% of the thicket supply, while direct rain is 27%, the senescence zone is 10% and the upslope border contribution is negligible (1%). {T}he average water infiltration in the thicket is equal to 4 times the incident rainfall, but water redistribution is not homogeneous within the core of the thicket. {B}y the most favourable location, infiltration depth is measured to be about 8 the rainfall... ({D}'apr{\`e}s r{\'e}sum{\'e} d'auteur)},
  keywords = {{FORMATION} {VEGETALE} ; {DYNAMIQUE} {DE} {VEGETATION} ; {CARACTERISTIQUE} {HYDROLOGIQUE} ; {EQUILIBRE} ; {PLUIE} ; {ECOULEMENT} ; {INFILTRATION} ; {HUMIDITE} {DU} {SOL} ; {ETUDE} {DE} {CAS} ; {BROUSSE} {TIGREE} ; {NIGER} ; {ZONE} {SAHELIENNE} ; {BANIZOUMBOU} {VILLAGE}},
  booktitle = {{T}he significance of soil, water and landscape processes in banded vegetation patterning},
  journal = {{C}atena},
  volume = {37},
  numero = {1-2},
  pages = {197--216},
  ISSN = {0341-8162},
  year = {1999},
  DOI = {10.1016/{S}0341-8162(98)90060-1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010018928},
}