@article{fdi:010085228, title = {{S}patio-temporal dynamics of suspended particulate matter in the middle {N}iger {R}iver using in-situ and satellite radiometric measurements}, author = {{M}oussa, {M}. {B}. and {T}oure, {A}. {A}. and {K}ergoat, {L}. and {L}artiges, {B}. and {R}ochelle-{N}ewall, {E}mma and {R}obert, {E}. and {G}osset, {M}arielle and {T}animoun, {B}. {A}. and {G}rippa, {M}.}, editor = {}, language = {{ENG}}, abstract = {{S}tudy {R}egion: {M}iddle {N}iger {R}iver {B}asin ({MNRB}), {A}nsongo to {N}iamey, {S}ahel, {W}est {A}frica. {S}tudy {F}ocus: {A}lthough {MNRB} hydrology and the red flood phenomena have been addressed in the past literature, water quality parameters and suspended particulate matter ({SPM}) dynamics remain poorly known. {SPM} impacts dam silting, exacerbating flooding, and microbial water quality. {T}his study couples in-situ {SPM} measurements to radiometric measurements by in-situ and satellite sensors to analyse the temporal and spatial evolution of {SPM} in the {MNRB} and assess the contribution of the local flood (red flood) to {SPM} in {N}iamey. {N}ew {H}ydrological {I}nsights for the {R}egion: {SPM} is composed of very fine kaolinites with a major mode around 200-300 nanometers which results in high reflectance in the visible and infrared bands. {R}adiometric measurements by both radiometer and {S}entinel-2 {MSI} sensors are well correlated to in-situ {SPM}, allowing efficient spatio-temporal monitoring of {SPM} concentration. {SPM} increases very rapidly at the beginning of the rainy season, reaching a peak, characterized by very high {SPM} values, about one month before the red flood. {S}atellite data highlight the significant contribution of the right bank tributaries to {SPM} in the {MNRB} during this period. {SPM} then decreases and remains low despite the second runoff increase (black flood) arriving in {N}iamey after the end of the rainy season from the upper basin.}, keywords = {{M}iddle {N}iger {R}iver ; {S}uspended particulate matter ; {O}ptical remote sensing ; {D}ischarge ; {K}aolinite ; {S}entinel-2 {MSI} data ; {NIGER} ; {ZONE} {TROPPICALE} ; {ZONE} {SEMIARIDE} ; {NIGER} {BASSIN} ; {NIAMEY}}, booktitle = {}, journal = {{J}ournal of {H}ydrology : {R}egional {S}tudies}, volume = {41}, numero = {}, pages = {101106 [ p.]}, year = {2022}, DOI = {10.1016/j.ejrh.2022.101106}, URL = {https://www.documentation.ird.fr/hor/fdi:010085228}, }