@article{fdi:010066096,
  title = {{C}arbon, nitrogen, phosphorus, and sediment sources and retention in a small eutrophic tropical reservoir},
  author = {{N}emery, {J}. and {G}ratiot, {N}icolas and {D}oan, {P}. {T}. {K}. and {D}uvert, {C}. and {A}lvarado-{V}illanueva, {R}. and {D}uwig, {C}{\'e}line},
  editor = {},
  language = {{ENG}},
  abstract = {{R}apid urbanization and the absence of efficient water management policies are increasingly degrading the water quality of tropical reservoirs in developing countries. {T}he small tropical reservoir of {C}ointzio, located in the {T}rans-{M}exican {V}olcanic {B}elt, is a warm monomictic water body (surface area = 6 km(2) with short water residence time < 1 year) that is strategic to the drinking water supply of the city of {M}orelia and to downstream irrigation during the dry season (6 months of the year). {T}he reservoir faces two threats: (a) reduced water storage capacity due to sediment accumulation and (b) eutrophication caused by excess nutrients that likely come from untreated wastewaters in the upstream watershed. {I}ntensive field measurements of water and sediment were conducted in 2009 to characterize the trophic status of the reservoir and to estimate nitrogen ({N}) and phosphorus ({P}) sources, total suspended sediment ({TSS}) ({N}), ({P}), and carbon ({C}) loads, and their accumulation or removal in the reservoir. {W}e found that point sources represent the majority of {N} and {P} inputs to the reservoir. {T}he trophic status is clearly eutrophic given the high chlorophyll a peaks (up to 70 {A} mu g {L}-1) and a long period of anoxia (from {M}ay to {O}ctober). {M}ost of the {TSS}, {C}, {N}, and {P} were conveyed to the reservoir between {J}une and {O}ctober during the wet season. {T}he {TSS} yield from the watershed was estimated at 35 +/- {A} 19 t km(-2) year(-1), of which more than 90 % was trapped in the reservoir (sediment accumulation rate = 7800 +/- {A} 2100 g m(-2) of reservoir year(-1)). {T}he export load of {C}, {N}, and {P} downstream at the reservoir outlet was reduced by 31, 46 and 30 % respectively in comparison to the load at the reservoir inlet. {T}his study reveals the effect of climatic seasonality on inputs to tropical reservoirs and accumulation; it also highlights the need to both reduce nutrient input to combat eutrophication and mitigate erosion to maintain the water storage capacity of the reservoir over the long term.},
  keywords = {{T}ropical reservoir ; {E}utrophication ; {TSS}, {C}, {N}, and {P} ; {S}ources ; {R}etention ; {M}exico ; {MEXIQUE}},
  booktitle = {},
  journal = {{A}quatic {S}ciences},
  volume = {78},
  numero = {1},
  pages = {171--189},
  ISSN = {1015-1621},
  year = {2016},
  DOI = {10.1007/s00027-015-0416-5},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066096},
}