@article{fdi:010075627,
  title = {{I}mpact of land degradation from mining activities on the sediment fluxes in two large rivers of {F}rench {G}uiana},
  author = {{G}allay, {M}. and {M}artinez, {J}ean-{M}ichel and {A}llo, {S}. and {M}ora, {A}. and {C}ochonneau, {G}{\'e}rard and {G}ardel, {A}. and {D}oudou, {J}ean-{C}laude and {S}arrazin, {M}ax and {C}how-{T}oun, {F}. and {L}araque, {A}lain},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e analyzed two contrasting catchments located among the world's largest unspoiled tropical rainforests impacted by mining in the northeastern coastlands of {S}outh {A}merica. {W}e used the following: (a) mining, agricultural, and urbanized areas to compare the land use evolution with suspended sediments and sediment yields; (b) field monthly river suspended sediments in the two catchments (2004-2015: n = 154); (c) {MODIS} remote sensing water color technique in the {M}aroni basin to complete (n = 387) and extend field suspended sediment sampling from 2000 to 2015; (d) hydroclimatic statistical analysis conditions and sediment concentrations to identify the long-term trends, the abrupt changes in time series and to analyze if the environmental and anthropogenic factors control sediment yield regional variations. {N}o significant long-term changes were observed in precipitation or water discharge with the {M}ann-{K}endall test. {H}owever, the mean suspended sediment concentration has increased significantly (239%) in the {M}aroni {R}iver with a breakpoint in 2009 and decreased (33%) in the {O}yapock {R}iver (breakpoint in 2008). {T}hese differences are explained by the larger percentage of deforestation because of mining activities in the {M}aroni (0.37%) than in the {O}yapock (0.06%) catchment. {I}n the {M}aroni {R}iver, the increasing sediment yield trend (2000-2015) coincide significantly (r2 = 0.97; p < 0.0001) with the increase of 400% of mining areas, whereas no significant relationship with the runoff was found. {I}n the {O}yapock {R}iver, the runoff explains the sediment yield decreasing trend (r2 = 0.82; p < 0.0001) and no relationship with the land use change was found.},
  keywords = {land degradation ; mining ; {MODIS} ; runoff ; sediment yields ; {GUYANE} {FRANCAISE} ; {MARONI} {COURS} {D}'{EAU} ; {OYAPOCK} {COURS} {D}'{EAU}},
  booktitle = {},
  journal = {{L}and {D}egradation and {D}evelopment},
  volume = {29},
  numero = {12},
  pages = {4323--4336},
  ISSN = {1085-3278},
  year = {2018},
  DOI = {10.1002/ldr.3150},
  URL = {https://www.documentation.ird.fr/hor/fdi:010075627},
}