@article{fdi:010044155, title = {{S}oil morphological control on saline and freshwater lake hydrogeochemistry in the {P}antanal of {N}hecolandia, {B}razil}, author = {{B}arbi{\'e}ro, {L}aurent and {R}ezende, {A}. and {F}urquim, {S}.{A}.{C}. and {F}urian, {S}. and {S}akamoto, {A}.{Y}. and {V}alles, {V}. and {G}raham, {R}.{C}. and {F}ort, {M}. and {F}erreira, {R}.{P}.{D}. and {N}eto, {J}.{P}.{Q}.}, editor = {}, language = {{ENG}}, abstract = {{J}oint pedological, geochemical, hydrological and geophysical investigations were performed to study the coexistence or saline and freshwater lakes in close proximity and similar climatic conditions in the {N}hecolandia region, {P}antanal wetlands in {B}razil. {T}he saline lakes are concentrically surrounded by green sandy loam horizons, which cause differential hydrological regimes. {M}g-calcite, {K}-silicates, and amorphous silica precipitate in the soil cover, whereas {M}g-silicates and more soluble {N}a-carbonates are concentrated in the topsoil along the shore of the saline lake. {I}n saline solutions, some minor elements ({A}s, {S}e) reach values above the water quality recommendations, whereas others are controlled and incorporated in solid phases ({B}a, {S}r). {L}ocally, the destruction of the sandy loam horizons generates very acidic soil solution (p{H} similar to 3.5) through a process not yet understood. {T}he soil distributions indicate that some freshwater lakes are former saline lakes. {T}hey are invaded by freshwater after destruction of the sandy loam green horizons, then the freshwater becomes enriched in {K}+, {SO}42-, {F}e, {A}l, and a stream of minor and trace elements. {T}he formation of these green sandy loam horizons in the saline environment and their destruction in the non-saline one emphasizes the dynamic nature of this environment ({C}) 2008 {E}lsevier {B}.{V}. {A}ll rights reserved.}, keywords = {{A}lkalinity ; {S}odicity ; {S}aline lake ; {S}oil hydrology ; {N}hecolandia ; {P}antanal ; {B}razil ; {BRESIL}}, booktitle = {}, journal = {{G}eoderma}, volume = {148}, numero = {1}, pages = {91--106}, ISSN = {0016-7061}, year = {2008}, DOI = {10.1016/j.geoderma.2008.09.010}, URL = {https://www.documentation.ird.fr/hor/fdi:010044155}, }