Meunier J. D. auteur aut IRD Braun Jean-Jacques auteur aut IRD Riotte Jean auteur aut IRD Kumar C. auteur aut IRD Sekhar M. auteur aut IRD text journalArticle eng text/pdf born digital access The global Si cycle is strongly controlled by riverine input. Over the last decade two parameters have been shown to play a significant role in the control of dissolved Si (DSi): biology, through the effects of diatom blooms and vegetation growth, and human activity, through the effects of eutrophication, urbanisation, agriculture, deforestation and damming. Human perturbations should now be better quantified when modelling the global Si cycle and particularly in the tropics. A case study is presented based on preliminary data along the Kaveri river (India) strongly impacted by dams. It is suggested that DSi is controlled by a combined effect of chemical weathering, damming and groundwater recharge. specialized 064 26 Suppl. S S360-S362 2011 0883-2927 https://www.documentation.ird.fr/hor/fdi:010054224 10.1016/j.apgeochem.2011.03.060 0883-2927 [F B010054224] https://www.documentation.ird.fr/hor/fdi:010054224 https://www.documentation.ird.fr/intranet/publi/2011/12/010054224.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2012-01-10 2017-08-23 fdi:010054224 fre