@article{fdi:010082597, title = {{C}omparative hydrodynamic study of granitic and sedimentary catchments in {W}estern {N}iger}, author = {{A}bdou, {M}. {M}. and {V}andervaere, {J}. {P}. and {D}escroix, {L}uc and {M}oussa, {I}. {B}.}, editor = {}, language = {{ENG}}, abstract = {{T}his study aims to compare hydrological processes in the {L}iptako-{G}ourma crystalline basement and the {I}ullemeden sedimentary zone in {W}estern {N}iger. {T}hese two sites were equipped to quantify water infiltration, runoff and water retention within the beds of the ravines. {W}e found that for the same surface type, while hydraulic conductivity was similar in both sites, surface runoff was 15-50% higher in the crystalline site compared to the sedimentary site. {W}ithin the sedimentary basin, we assume that runoff mainly originated from the tiger bush (typical vegetation and bare soil stripes found on plateaus). {W}e suggest that the main reason for differences in stream flow was the stream storage capacity, which was four-fold higher in the sedimentary area compared to the crystalline domain. {W}e thus conclude that the crystalline area functions as a water production and draining zone whereas the sedimentary basin is an accumulator of this resource.}, keywords = {rain redistribution processes ; water resources ; crystalline basement ; sedimentary basin ; runoff ; {N}iger ; {S}ahel ; {NIGER} ; {SAHEL} ; {LIPTAKO} {GOURMA} ; {IULLEMEDEN}}, booktitle = {}, journal = {{H}ydrological {S}ciences {J}ournal = {J}ournal des {S}ciences {H}ydrologiques}, volume = {66}, numero = {10}, pages = {1541--1551}, ISSN = {0262-6667}, year = {2021}, DOI = {10.1080/02626667.2021.1921181}, URL = {https://www.documentation.ird.fr/hor/fdi:010082597}, }