@article{PAR00007903,
  title = {{F}aecal bacterial loads during flood events in {N}orthwestern {M}editerranean coastal rivers},
  author = {{C}hu, {Y}. and {S}alles, {C}. and {T}ournoud, {M}. {G}. and {G}ot, {P}. and {T}roussellier, {M}arc and {R}odier, {C}. and {C}aro, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n {M}editerranean coastal rivers, floods last often less than a few hours but supply large amounts of contaminants to transitional and coastal waters. {E}stimating flood loads requires appropriate sampling strategies. {W}e applied flood-scale sampling for the survey of two rivers flowing into the {T}hau lagoon ({F}rance). {T}wo bacterial indicators were considered, thermotolerant coliforms ({TIC}) and faecal streptococci ({FC}). {D}uring floods, concentrations of indicator bacteria associated with non-mineral suspended solids increased quickly with the rising flow, their decrease during the recession period was slow and erratic. {S}tatistical analysis was performed on total bacterial flood loads measured during 20 floods, versus hydrological variables and land-use characteristics. {T}he analysis highlighted the significant impacts of human pollution sources together with the magnitude of the flood. {R}egarding the results, the best linear regression models linked total bacterial flood loads to peak discharge for both {TTC} and {FS}, reinforcing the assumption that in-stream bacterial stores play an important role in the level of bacterial flood loads in {M}editerranean coastal rivers. {A}t an annual scale, between 13.9 and 16.6 log(10)cfu of {TTC} could be supplied depending on the hydrological conditions during the year. {O}ver the 12 year period, from 1994 to 2006 it was shown that the flood loads were responsible for at least 98% of the {TTC} total annual load and in 8 of 12 years the floods contributed to at least 99.9% of the annual loads. {O}ver the same period on average the single major flood represents 74% of the total annual load. {T}he contribution of in-stream bacterial stores was demonstrated but spatial variations in total flood loads showed that this contribution is difficult to evaluate. {B}acteria from land stores appeared to be negligible in both catchments.},
  keywords = {{F}aecal bacteria ; {F}lood dynamics ; {F}lood loads ; {S}tatistical models ; {B}acterial sources ; {L}and use},
  booktitle = {},
  journal = {{J}ournal of {H}ydrology},
  volume = {405},
  numero = {3-4},
  pages = {501--511},
  ISSN = {0022-1694},
  year = {2011},
  DOI = {10.1016/j.jhydrol.2011.05.047},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00007903},
}