@incollection{fdi:010078620, title = {{T}he sedimentological changes caused by human impact at the artificial channel of {M}edjerda-river ({C}oastal zone of {M}edjerda, {T}unisia)}, author = {{B}enmoussa, {T}. and {A}mrouni, {O}. and {D}ezileau, {L}. and {M}ah{\'e}, {G}il and {A}bdeljaouad, {S}.}, editor = {}, language = {{ENG}}, abstract = {{R}ecent sedimentary and morphological changes at the new mouth of {M}edjerda-{R}iver ({G}ulf of {T}unis) are investigated using a multiproxy approach of sediment cores complited by 210{P}bex and 137{C}s method dating. {T}he subject of the study is to focus on surveying the sedimentary evolution of {M}edjerda-{R}aoued {D}elta caused by the human intervention in the management of the main tributaries of the {M}edjerda-{R}iver (artificial channel of {H}enchir {T}obias). {S}ediment cores ({CEM}-1 and {CEM}-3) were subjected to both multiproxy approaches ({G}rain size, geochemical analysis and dating radiometric 210{P}bex and 137{C}s). {T}he sedimentological analysis of the new deltaic deposits shows a progradation sequence with the silt and clay deposits on the historic sandy substratum. {T}he mean grain size evolution on the old beach profile shows a decreasing trend from backshore ({CEM}-3) to nearshore ({CEM}-1). {T}he geochemical results show varying concentrations of chemical elements such as {F}e, {K}, {R}b, {N}b, {C}r, {T}i, {B}a, {C}a, {S}r, {Z}r, {V}, and potentially toxic metal trace elements such as {P}b, {Z}n and the {A}s. {T}he {P}rincipal component {A}nalysis ({PCA}) applied in the geochemical elements evolution confirms the marine origin of the sand deposits in the basic layers of the two cores. {T}he chronological method (210{P}bex and 137{C}s) affirms that the first fluvial deposits were set up only after 1950. {T}he sedimentological and geochemical result confirm the actual unless of coarser fluvial supplies under the human activities leading the negative coastal sediment balance and the shoreline retreat as well.}, keywords = {{SEDIMENTATION} {DELTAIQUE} ; {FACTEUR} {ANTHROPIQUE} ; {EVOLUTION} ; {METHODE} ; {DATATION} ; {GEOCHIMIE} ; {GRANULOMETRIE} ; {SEDIMENT} ; {COURS} {D}'{EAU} ; {DELTA} ; {CANAL} ; {CAROTTAGE} ; {TUNISIE} ; {MEDJERDA} {COURS} {D}'{EAU} ; {HENCHIR} {TOBIAS} {CANAL} ; {TUNIS} {GOLFE}}, booktitle = {{W}ater quality and sediment transport issues in surface water}, numero = {377}, pages = {77--81}, address = {{W}allingford}, publisher = {{AISH}}, series = {{P}ublication - {AISH}}, year = {2018}, DOI = {10.5194/piahs-377-77-2018}, ISBN = {978-1-5108-6145-9}, URL = {https://www.documentation.ird.fr/hor/fdi:010078620}, }