@article{fdi:010037959,
  title = {{M}echanisms affecting stormflow generation and solute behaviour in a {S}ahelian headwater catchment},
  author = {{R}ibolzi, {O}livier and {K}arambiri, {H}. and {B}ariac, {T}. and {B}enedetti, {M}. and {C}aquineau, {S}andrine and {D}escloitres, {M}arc and {A}venturier, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he aim of this study was to analyse stormflow processes and the behaviour of solutes therein ({C}a2+, {M}g2+, {N}a+, {K}+, alkalinity, {NO}3-, {S}o(4)(2-), {C}l-, {S}i), during flood events in tropical semi-arid conditions. {T}he study site was a small {S}ahelian catchment (1.4 ha) located in northern {B}urkina {F}aso. {R}unoff and rain water was sampled over a 2-year period (1999 and 2000). {I}n addition to dissolved load, suspended load was measured in the stream water collected at the outlet of the catchment. {I}sotopic tracing using 6180 was also conducted during two very different flood events. {T}he results indicated that: (i) event water was by far the major contributor to the stream stormflow, with {H}ortonian overland flow being the. main stormflow process at work; (ii) a small fraction of pre-event soil water may have contributed during the recession of heavy flood with wet antecedent conditions; (iii) solute concentrations were higher in runoff compared to rainwater. {W}ith the exception of {NO}3- and {C}l-, the highest concentrations were measured at the onset of floods, and almost always decreased during the rising stage of the hydrographs; (iv) a good correlation was found between suspended load and the concentrations of {C}a2+, {M}g2+, alkalinity and {S}i. {I}t was concluded that fast physico-chemical interactions between event water and reactive suspended phases may explain most of the chemical changes between rainwater and floodwater.},
  keywords = {{H}ortonian overland flow ; subsurface flow ; event water ; runoff chemistry ; suspended load ; isotopic tracing ; semi arid zone},
  booktitle = {},
  journal = {{J}ournal of {H}ydrology},
  volume = {337},
  numero = {1-2},
  pages = {104--116},
  ISSN = {0022-1694},
  year = {2007},
  DOI = {10.1016/j.jhydrol.2007.01.019},
  URL = {https://www.documentation.ird.fr/hor/fdi:010037959},
}