@article{fdi:010074449,
  title = {{W}ater and organic carbon cycles in monsoon-driven humid tropics of the {W}estern {G}hats {M}ountain {B}elt, {I}ndia : insights from stable isotope approach},
  author = {{T}ripti, {M}. and {G}urumurthy, {G}. {P}. and {L}ambs, {L}. and {R}iotte, {J}ean and {B}alakrishna, {K}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {W}estern {G}hats form a major mountain belt, next to the {H}imalayas, in controlling the flux of water and carbon to the northern {I}ndian {O}cean. {T}his study attempts to understand the water and carbon cycles in two humid tropical river basins with its streams originating at higher altitudes of the {W}estern {G}hats, {I}ndia. {W}ater and suspended particulate matter ({SPM}) were collected on a monthly scale during summer monsoon season ({J}une-{S}eptember) from {S}warna and {N}ethravati rivers draining into the {A}rabian {S}ea. {F}or the source apportionment, samples have been measured for stable isotopes of oxygen ({O}-18) and hydrogen ({H}-2) in water and stable isotopes of carbon ({C}-13({POC})) in particulate organic matter ({POM}) at spatial scale from tributaries and main channel of rivers, and runoff water from agricultural land (dominant paddy field) and forest in the downstream region. {T}he association between {O}-18 and deuterium-excess in river water and rain water shows that water in these tropical basins depicts rainout effect of marine source moisture during the onset of summer monsoon. {A}s the monsoon intensifies, the fresher rain water replenishes older water stored previously in sub surface soil layer leading to its flushing into the river during summer monsoon season. {S}table carbon isotope ratio and elemental ratio of {POM} ({C}-13({POC}) = -27.1 +/- 0.4 parts per thousand and {C}/{N} = 8.1 +/- 1.7) in two humid tropical river water during summer monsoon season is an admixture of suspended particulates from runoff water of forest ({C}-13({POC}) = - 27.82 +/- 0.4 parts per thousand) and agricultural land ({C}-13({POC}) = -26.29 +/- 0.4 parts per thousand). {I}t is found that {C}-13({POC}) shows minimal variability with {SPM} content and {C}/{N} ratio within the same organic carbon pool. {T}he study emphasizes the need to consider the agricultural runoff contribution to the rivers while establishing the global elemental budget and observing the global climate change.},
  keywords = {{INDE}},
  booktitle = {},
  journal = {{J}ournal of the {G}eological {S}ociety of {I}ndia},
  volume = {92},
  numero = {5},
  pages = {579--587},
  ISSN = {0016-7622},
  year = {2018},
  DOI = {10.1007/s12594-018-1070-z},
  URL = {https://www.documentation.ird.fr/hor/fdi:010074449},
}