@article{fdi:010070547,
  title = {{A}ssessing floods and droughts in ungauged small reservoirs with long-term {L}andsat imagery},
  author = {{O}gilvie, {A}ndrew and {B}elaud, {G}. and {M}assuel, {S}ylvain and {M}ulligan, {M}. and {L}e {G}oulven, {P}atrick and {C}alvez, {R}oger},
  editor = {},
  language = {{ENG}},
  abstract = {{S}mall reservoirs have developed across semi-arid areas as a low cost solution for millions of rural small holders to harvest scarce water resources. {S}tudies have highlighted limited agricultural water use and low water availability on individual reservoirs, but no information exists on the drought patterns of multiple small reservoirs. {T}heir small size and dispersion prevents individualised hydrological monitoring, while hydrological modelling suffers from rainfall variability and heterogeneity across data sparse catchments and reservoirs. {A} semi-automated original approach exploiting free, archive {L}andsat satellite images is developed here for long-term monitoring of multiple ungauged small water bodies. {A}dapted and tested against significant hydrometric time series on three lakes, the method confirms its potential to monitor water availability on the smallest water bodies (1-10 ha) with a mean {RMSE} of 20,600 m3 ({NRMSE} = 26%). {U}ncertainties from the absence of site-specific and updated surface-volume rating curves were here contained through a power relationship adapted over time for silting based on data from 15 surrounding lakes. {A}pplied to 51 small reservoirs and 546 images over 1999-2014, results highlight the ability of this transposable method to shed light on flood dynamics and allow inter annual and inter lake comparisons of water availability. {I}n the {M}erguellil upper catchment, in {C}entral {T}unisia, results reveal the significant droughts affecting over 80% of reservoirs, confirming the need for small reservoirs to maintain a supplementary irrigation objective only.},
  keywords = {{RESSOURCES} {EN} {EAU} ; {INONDATION} ; {SECHERESSE} ; {EVALUATION} ; {PRECIPITATION} ; {VARIABILITE} ; {RESERVOIR} ; {BASSIN} {VERSANT} ; {TELEDETECTION} {SPATIALE} ; {IMAGE} {SATELLITE} ; {SATELLITE} {LANDSAT} ; {METHODOLOGIE} ; {SURVEILLANCE} ; {LAC} ; {HETEROGENEITE} ; {PETIT} {BARRAGE} ; {TUNISIE} ; {ZONE} {SEMIARIDE} ; {MERGUELLIL} {BASSIN} {VERSANT}},
  booktitle = {},
  journal = {{G}eosciences},
  volume = {6},
  numero = {4},
  pages = {art. no 42 [25  en ligne]},
  ISSN = {2076-3263},
  year = {2016},
  DOI = {10.3390/geosciences6040042},
  URL = {https://www.documentation.ird.fr/hor/fdi:010070547},
}