@article{fdi:010064631,
  title = {{C}ontribution of groundwater to the outflow from ungauged glacierized catchments : a multi-site study in the tropical {C}ordillera {B}lanca, {P}eru},
  author = {{B}araer, {M}. and {M}c{K}enzie, {J}. and {M}ark, {B}. {G}. and {G}ordon, {R}. and {B}ury, {J}. and {C}ondom, {T}homas and {G}omez, {J}. and {K}nox, {S}. and {F}ortner, {S}. {K}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he rapid retreat of the glaciers of the {C}ordillera {B}lanca is having a noticeable impact on the downstream hydrology. {A}lthough groundwater is a critical hydrologic component that sustains stream flows during the dry season, its characteristics and its contribution to downstream hydrology remain poorly understood. {I}n this study, we analyse the hydrochemical and isotopic properties of potential hydrologic sources mixing in surface streams to characterize the proglacial hydrology in four glacially fed watersheds within the {C}ordillera {B}lanca, {P}eru. {W}ater samples from streams, glacial melt and groundwater were collected in 2008 and 2009 and analysed for major ions and stable isotopes ({O}-18 and {H}-2). {M}ultivariate analysis of variance was used first to identify the hydrochemical and isotopic characteristics (tracers) of the water samples that depend primarily on the water source. {T}hen several analyses, including hierarchical cluster analysis and mixing diagrams, were performed using these source-dependent tracers, enabling a qualitative description of the key hydrological mechanisms that characterize the study watersheds. {F}inally, we applied a multi-component spatial mixing model, the hydrochemical basin characterization method, to quantify the contributions of different water sources to the outflow from the four watersheds. {T}he hydrochemical basin characterization method results show that groundwater is a major component of the discharge during the dry season and that the groundwater contribution to outflow is greater than 24% in all of the valleys. {T}he results are used to develop a conceptual proglacial hydrological model of the {C}ordillera {B}lanca valleys. {T}alus and avalanche cones are identified as key components of the hydrology of the valleys. {T}he talus deposits collect precipitation and runoff from higher elevations (approximately 400m above the valley floor) and have a residence time that is long enough to actively release substantial volumes of water throughout the dry season.},
  keywords = {glacierized catchment ; groundwater ; tropical {A}ndes ; mixing model ; hydrochemistry ; isotopes ; {PEROU} ; {ANDES} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{H}ydrological {P}rocesses},
  volume = {29},
  numero = {11},
  pages = {2561--2581},
  ISSN = {0885-6087},
  year = {2015},
  DOI = {10.1002/hyp.10386},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064631},
}