@article{fdi:010093412,
  title = {{S}treamflow monitoring at high temporal resolution based on non-contact instruments and manually surveyed bathymetry in a river prone to bathymetric shifts},
  author = {{N}ord, {G}. and {S}afdar, {S}. and {H}asanyar, {M}. and {E}ze, {K}. {O}. and {B}iron, {R}omain and {F}reche, {G}. and {D}enis, {H}. and {L}egout, {C}. and {H}auet, {A}. and {E}steves, {M}ichel},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study presents a proof of concept of a reliable methodology for monitoring streamflow in a dynamic river of the {A}lps prone to bathymetric changes using non-contact instruments. {T}he method relies on water level and surface velocity radar monitoring, discharge measurements by {L}arge-{S}cale {P}article {I}mage {V}elocimetry ({LSPIV}), and topographic surveys. {A} single proportional relation, stable under bathymetric changes, is established between maximum surface velocity ({V}s,max) and bulk velocity ({U}mean) using {LSPIV} measurements. {T}he location of the maximum surface velocity is also shown to be relatively stable under bathymetric changes. {T}he {I}sovel model, a theoretical approach which requires minimal information (i.e., bathymetry, water level and bed roughness) is also used to assess its capacity to predict the {V}s,max-{U}mean relation and the location of the maximum surface velocity. {S}uch model could be useful for applying the method in the absence of {LSPIV} measurements in the future. {T}he applicability of the method is finally tested over a 2.5-year data set. {D}ischarge is calculated at a time step of 10 min by multiplying the bulk velocity and the wetted cross-sectional area. {T}he results are compared to the specific discharge time series at the historical station located 2.5 km further upstream, which has a stage-discharge rating curve, to assess the credibility of the proposed method. {G}ood agreement is generally observed when surface velocity is above 0.7 m/s, but accuracy decreases for lower velocities. {A} simplified uncertainty analysis estimates a 25% relative error on discharge calculated with the presented method.},
  keywords = {discharge ; surface water velocity ; river ; monitoring ; radar ; topography ; {FRANCE} ; {GALABRE} {COURS} {D}'{EAU}},
  booktitle = {},
  journal = {{W}ater {R}esources {R}esearch},
  volume = {61},
  numero = {4},
  pages = {e2024{WR}037536 [31 p.]},
  ISSN = {0043-1397},
  year = {2025},
  DOI = {10.1029/2024wr037536},
  URL = {https://www.documentation.ird.fr/hor/fdi:010093412},
}