@article{fdi:010075628,
  title = {{R}eduction of stream nitrate concentrations by land management in contrasted landscapes},
  author = {{C}asal, {L}. and {D}urand, {P}. and {A}kkal-{C}orfini, {N}. and {B}enhamou, {C}. and {L}aurent, {F}. and {S}almon-{M}onviola, {J}. and {F}errant, {S}ylvain and {P}robst, {A}. and {P}robst, {J}. {L}. and {V}ertes, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{O}ptimizing management practices at the plot scale is sometimes not sufficient to reach water framework directive objectives for nitrate pollution. {L}and management measures involving targeted setting aside of croplands is a promising solution, but its efficiency depends on the local context. {W}e used a distributed agro-hydrological model to compare management interventions intended to decrease vertical and lateral nitrate leaching from soil to groundwater and stream water in two contrasted agricultural catchments. {T}he simulated scenarios combined two strategies: optimization of agricultural practices and land-use conversion from agricultural to natural land at different locations within the catchments. {L}ong- term climate, discharge, and nitrate concentrations have been monitored for the two catchments and agricultural practices are well known over the 13-year simulation period (2002-2015). {T}he {K}ervidy-{N}aizin site ({KN}) is subject to intense livestock pressure with mean nitrogen inputs of 257 kg ha(-1) year while the {A}urade site ({AU}) is primarily cereal cultivation with nitrogen inputs of 109 kg ha(-1) year(-1). {T}he results highlight a large nitrogen legacy in {KN}, resulting in a progressive and long lived (> 10 years) response to changes in management, while in {AU}, this response is perceptible after only 5-7 years. {F}or both catchments, the most effective scenario involves wide riparian buffer strips in interception position covering about 15% of the catchment area. {I}n {KN}, this land conversion scenario, simulated with the agro-hydrological model {TNT}2, created a decrease of nitrate concentration in stream water by 25% versus 15% in {AU}. {C}ontrastingly, the implementation of best management practices decreased stream nitrate concentration only by 9% for {KN} and 4% for {AU}.},
  keywords = {{D}istributed model ; {N}itrogen cycling ; {M}itigation scenario ; {C}atchment ; {B}est management practice ; {R}iparian zone ; {FRANCE} ; {BRETAGNE} ; {GASCOGNE}},
  booktitle = {},
  journal = {{N}utrient {C}ycling in {A}groecosystems},
  volume = {114},
  numero = {1},
  pages = {1--17},
  ISSN = {1385-1314},
  year = {2019},
  DOI = {10.1007/s10705-019-09985-0},
  URL = {https://www.documentation.ird.fr/hor/fdi:010075628},
}