@article{fdi:010068251,
  title = {{D}enudation rates on cratonic landscapes : comparison between suspended and dissolved fluxes, and {B}e-10 analysis in the {N}yong and {S}anaga {R}iver basins, south {C}ameroon},
  author = {{R}egard, {V}. and {C}arretier, {S}{\'e}bastien and {B}oeglin, {J}ean-{L}oup and {N}goupayou, {J}. {R}. {N}. and {D}zana, {J}. {G}. and {B}edimo, {J}. {P}. {B}. and {R}iotte, {J}ean and {B}raun, {J}ean-{J}acques},
  editor = {},
  language = {{ENG}},
  abstract = {{S}outh {C}ameroon is located in a tropical and tectonically quiescent region, with landscapes characterized by thick highly weathered regolith, indicative of the long-term predominance of chemical weathering over erosion. {C}urrently this region undergoes huge changes due to accelerated mutations related to a growing population and economical developments with associated needs and increasing pressures on land and natural resources. {W}e analysed two of the main south {C}ameroon rivers: the {N}yong {R}iver and {S}anaga {R}iver. {T}he {S}anaga catchment undergoes a contrasted tropical climate from sub-humid mountainous and humid climate and is impacted by deforestation, agriculture, damming, mining and urbanization, especially in the {M}bam sub-basin, draining the highly populated volcanic highlands. {B}y contrast, the {N}yong catchment, only under humid tropical climate, is preserved from anthropogenic disturbance with low population except in the region of {Y}aounde ({M}efou sub-basin). {M}oreover the {N}yong basin is dam-free and less impacted by agriculture and logging. {W}e explore both denudation temporal variability and the ratio between chemical and physical denudation through two catchment-averaged erosion and denudation datasets. {T}he first one consists of an 11-year long gauging dataset, while the second one comes from cosmogenic radionuclides [{CRN}s, here beryllium-10 ({B}e-10)] from sand sampled in the river mainstreams (timescale of tens to hundreds of thousands of years). {M}odern fluxes estimated from gauging data range from 5 to 100m/{M}a (10 to 200t/km(2)/yr); our calculations indicate that the usual relative contribution of chemical versus physical denudation is 60% and 40%, respectively, of the total denudation. {B}eryllium-10 denudation rates and sediment fluxes range from 4.8 to 40.3m/{M}a or 13 to 109t/km(2)/yr, respectively, after correction for quartz enrichment. {T}hese fluxes are slightly less than the modern fluxes observed in {C}ameroon and other stable tropical areas. {T}he highest {B}e-10-derived fluxes and the highest physical versus chemical denudation ratios are attributed to anthropogenic impact.},
  keywords = {denudation rate ; weathering ; cosmogenic nuclides ; {C}ameroon ; craton ; {CAMEROUN} ; {ZONE} {TROPICALE} {HUMIDE} ; {SANAGA} {BASSIN} {VERSANT} ; {MBAM} {BASSIN} {VERSANT} ; {NYONG} {BASSIN} {VERSANT}},
  booktitle = {},
  journal = {{E}arth {S}urface {P}rocesses and {L}andforms},
  volume = {41},
  numero = {12},
  pages = {1671--1683},
  ISSN = {0197-9337},
  year = {2016},
  DOI = {10.1002/esp.3939},
  URL = {https://www.documentation.ird.fr/hor/fdi:010068251},
}