@article{fdi:010079666,
  title = {{P}otash fertilizer promotes incipient salinization in groundwater irrigated semi-arid agriculture},
  author = {{B}uvaneshwari, {S}. and {R}iotte, {J}ean and {S}ekhar, {M}. and {S}harma, {A}. {K}. and {H}elliwell, {R}. and {K}umar, {M}. {S}. {M}. and {B}raun, {J}ean-{J}acques and {R}uiz, {L}aurent},
  editor = {},
  language = {{ENG}},
  abstract = {{I}ncipient groundwater salinization has been identified in many arid and semi-arid regions where groundwater is increasingly used for irrigation, but the dominant processes at stake in such context are yet uncertain. {G}roundwater solutes originates from various sources such as atmospheric inputs, rock dissolution and fertilizer residues, and their concentration is controlled by hydrological processes, in particular evapotranspiration. {H}ere, we propose a deconvolution method to identify the sources and processes governing the groundwater {C}hloride concentration in agricultural catchments, using the relative variations of {S}odium and {C}hloride and using a neighbouring pristine catchment as a reference for the release rate of {N}a by weathering. {W}e applied the deconvolution method to the case of the {K}abini {C}ritical {Z}one {O}bservatory, {S}outh {I}ndia, where groundwater was sampled in 188 farm tubewells in the semi-arid catchment of {B}erambadi and in 5 piezometers in the pristine catchment of {M}ule {H}ole. {I}n {B}erambadi, groundwater composition displayed a large spatial variability with {C}l contents spanning 3 orders of magnitude. {T}he results showed that the concentration factor due to evapotranspiration was on average about 3 times more than in the natural system, with higher values in the valley bottoms with deep {V}ertisols. {L}inked with this process, large concentration of {C}hloride originating from rain was found only in these areas. {A}t the catchment scale, about 60 percent of the {C}hloride found in groundwater originates from fertilizer inputs. {T}hese results show that {P}otassium fertilization as {KC}l is an important source of groundwater salinization in semi-arid context, and stress that identifying dominant drivers is crucial for designing efficient mitigation policies.},
  keywords = {{INDE} ; {ZONE} {SEMIARIDE} ; {KARNATAKA} ; {KABINI} {BASSIN} ; {MULE} {HOLE} {BASSIN} {VERSANT} ; {BERAMBADI} {BASSIN} {VERSANT}},
  booktitle = {},
  journal = {{S}cientific {R}eports - {N}ature},
  volume = {10},
  numero = {1},
  pages = {3691 [14 ]},
  ISSN = {2045-2322},
  year = {2020},
  DOI = {10.1038/s41598-020-60365-z},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079666},
}