@article{fdi:010011139,
  title = {{T}he role of surface water redistribution in an area of patterned vegetation in a semi-arid environment, south-west {N}iger},
  author = {{B}romley, {J}. and {B}rouwer, {J}. and {B}arker, {A}.{P}. and {G}aze, {S}.{R}. and {V}alentin, {C}hristian},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he surface hydrology of a semi-arid area of patterned vegetation in south-west {N}iger is described. {I}n this region alternating bands of vegetation and bare ground aligned along the contours of a gently sloping terrain give rise to a phenomenon known as "brousse tigr{\'e}e" (tiger bush). {A}t the selected study site the vegetation bands are 10-30 m wide, separated by 50-100 m-wide bands of bare ground. {F}ive species of shrub dominate, #{G}uiera senegalensis$, #{C}ombretum micranthum$, #{C}. nigricans$, #{A}cacia ataxacantha$ and #{A}. macrostachya$. {H}erbaceous vegetation is generally limited to the upslope edges of vegetation bands. {A} comprehensive field programme was undertaken to investigate the hydrology. {T}opographic, vegetation and surface feature surveys were carried out in conjunction with the measurement of rainfall, surface and subsurface hydraulic conductivity, particle size and soil moisture content. {F}our types of vegetation class are recognised, each tending to occupy a constant position relative to the others and to the regional slope. {I}n a downslope direction the classes are : bare ground, grassy open bush, closed bush, bare open bush, bare ground etc. {T}he nature of the ground surface is closely linked to the vegetation class. {O}ver the bare, bare open and grassy open classes various types of surface crust are present with each type of crust tending to occupy a constant position on the regional slope relative to the vegetation class and other crust types. {B}elow closed bush crusts are generally absent. {T}he typical downslope sequence from the downslope boundary of a vegetation band is : structural (sieving) crust -> erosion crust -> (gravel crust) -> sedimentation crust -> microphytic sedimentation crust -> no crust -> sieving crust, etc. {I}t is also shown that these crust types are dynamic and evolve from one to the other as hydrological conditions change... ({D}'apr{\`e}s r{\'e}sum{\'e} d'auteur)},
  keywords = {{BIOCLIMATOLOGIE} ; {RELATION} {SOL} {PLANTE} ; {COUVERT} {VEGETAL} ; {PHYTOECOLOGIE} ; {BILAN} {HYDRIQUE} ; {BROUSSE} {TIGREE} ; {ETAT} {DE} {SURFACE} {DU} {SOL} ; {ZONE} {SEMIARIDE} ; {NIGER} {SUD} {OUEST}},
  booktitle = {},
  journal = {{J}ournal of {H}ydrology},
  volume = {198},
  numero = {},
  pages = {1--29},
  ISSN = {0022-1694},
  year = {1997},
  URL = {https://www.documentation.ird.fr/hor/fdi:010011139},
}