@article{fdi:010052851, title = {{L}ong-term monitoring (1960-2008) of the river-sediment transport in the {R}ed {R}iver {W}atershed ({V}ietnam) : temporal variability and dam-reservoir impact}, author = {{T}hi, {H}. {D}. and {C}oyne, {A}. and {O}range, {D}idier and {B}lanc, {G}. and {E}tcheber, {H}. and {L}an, {A}. {L}.}, editor = {}, language = {{ENG}}, abstract = {{T}he {R}ed {R}iver ({C}hina/{V}ietnam, {A}=155,000 km(2)) is a typical humid tropics river originating from the mountainous area of {Y}unnan {P}rovince in {C}hina. {B}ased on information on daily discharge ({Q}) and suspended particulate matter ({SPM}) concentration between 1960-2008 for the {S}on{T}ay gauging station (outlet of the {R}iver and entry to the {D}elta) provided by the {N}ational {I}nstitute {IMHE}-{MONRE}, the mean annual {SPM} flux was estimated at 90 {M}t/yr, corresponding to a sediment yield of 600 t/km(2)/yr. {T}he temporal variability of annual {SPM} fluxes (ranging from 24 to 200 {M}t/yr) is strongly related to the interannual hydrological conditions. {H}owever, some years of high water flow were not associated with high sediment fluxes, especially after 1989 when the {H}oa{B}inh dam came into operation. {T}herefore, the median discharge pre-(3389 m(3)/s) and post 1989 (3495 m3/s) are similar indicating there was little or no change between both periods. {S}ediment rating curves (power law-type: {SPM} = a{Q}(b)) were fitted for both periods (1960-1989: 1990-2008). {T}he analysis of the pre- and post-1989 sediment rating parameters (a, b) suggests a downshift of b-parameter values after 1989, attributed to a decrease of the sediment supply due to the commissioning of the {H}oa{B}inh dam. {A} single sediment rating curve derived from 1960-1989 data was used to simulate the annual variability of former sediment delivery, generating excellent cumulative flux estimates (error -1%). {I}n contrast, applying the same rating curve to the 1990-2008 data resulted in systematic and substantial (up to 109%) overestimation. {T}his suggests that the {H}oa{B}inh dam reduces annual {SPM} delivery to the delta by half, implying important metal/metalloid storage behind the {H}oa{B}inh dam.}, keywords = {{R}ed river ; {E}rosion ; {S}uspended particulate matter flux ; {T}emporal ; variability ; {D}am reservoir ; {VIET} {NAM}}, booktitle = {}, journal = {{S}cience of the {T}otal {E}nvironment}, volume = {408}, numero = {20}, pages = {4654--4664}, ISSN = {0048-9697}, year = {2010}, DOI = {10.1016/j.scitotenv.2010.07.007}, URL = {https://www.documentation.ird.fr/hor/fdi:010052851}, }