C. Alewell, G. Lischeid, U. Hell, and B. Manderscheid, High temporal resolution of ion fluxes in semi-natural ecosystems ??? gain of information or waste of resources?, Biogeochemistry, vol.69, issue.1, pp.19-35, 2004.
DOI : 10.1023/B:BIOG.0000031029.46798.7f

S. Altman and R. Parizek, Dilution of Nonpoint-Source Nitrate in Groundwater, Journal of Environment Quality, vol.24, issue.4, pp.707-718, 1995.
DOI : 10.2134/jeq1995.00472425002400040023x

B. Arheimer, L. Andersson, and A. Lespitö, Variation of nitrogen concentration in forest streams ??? influences of flow, seasonality and catchment characteristics, Journal of Hydrology, vol.179, issue.1-4, pp.1-4, 1996.
DOI : 10.1016/0022-1694(95)02831-5

B. Aulenbach and R. Hooper, The composite method: an improved method for stream-water solute load estimation, Hydrological Processes, vol.54, issue.14, pp.3028-3047, 2006.
DOI : 10.1002/hyp.6147

C. Billy, C. Kao, F. Birgand, J. Tournebize, and M. Sebilo, Nitrate dynamics in a subsurface artificially drained watershed, Geophys. Res, 2007.
URL : https://hal.archives-ouvertes.fr/bioemco-00319376

. Abst, 9: 11165 Cited in http

F. Birgand, QUANTIFICATION AND MODELING OF IN-STREAM PROCESSES IN FOREST IMPACTED AGRICULTURAL CANALS OF THE LOWER COASTAL PLAIN, Hydrology and Management of Forested Wetlands, Proceedings of the International Conference, April 8-12, 2006, New Bern, North Carolina, 2000.
DOI : 10.13031/2013.20350

F. Birgand, C. Faucheux, G. Gruau, B. Augeard, F. Moatar et al., Uncertainties in Assessing Annual Nitrate Loads and Concentration Indicators: Part 1. Impact of Sampling Frequency and Load Estimation Algorithms, Transactions of the ASABE, vol.53, issue.2, pp.437-446, 2010.
DOI : 10.13031/2013.29584

URL : https://hal.archives-ouvertes.fr/insu-00578143

M. Bowes, J. Smith, and C. Neal, The value of high-resolution nutrient monitoring: A case study of the River Frome, Dorset, UK, Journal of Hydrology, vol.378, issue.1-2, pp.82-96, 2009.
DOI : 10.1016/j.jhydrol.2009.09.015

T. Chapin, J. Caffrey, H. Jannasch, L. Coletti, J. Haskins et al., Nitrate sources and sinks in Elkhorn Slough, California: Results from long-term continuous in situ nitrate analyzers, Estuaries, vol.68, issue.5, pp.882-894, 2004.
DOI : 10.1007/BF02912049

T. Cohn, L. Delong, E. Gilroy, R. Hirsch, and D. Wells, Estimating constituent loads, Water Resources Research, vol.24, issue.9, pp.937-942, 1989.
DOI : 10.1029/WR025i005p00937

X. Feng, J. Kirchner, and C. Neal, Measuring catchment-scale chemical retardation using spectral analysis of reactive and passive chemical tracer time series, Journal of Hydrology, vol.292, issue.1-4, pp.296-307, 2004.
DOI : 10.1016/j.jhydrol.2004.01.012

R. Fergusson, Accuracy and precision of methods for estimating river loads, Earth Surface Processes and Landforms, vol.133, issue.1, pp.95-104, 1987.
DOI : 10.1002/esp.3290120111

S. Ferrant, Modélisation agro-hydrologique des transferts de nitrates á l'échelle des bassins versants agricoles gascons, 2009.

S. Ferrant, F. Oehler, P. Durand, L. Ruiz, J. Salmon-monviola et al., Understanding nitrogen transfer dynamics in a small agricultural catchment: Comparison of a distributed (TNT2) and a semi distributed (SWAT) modeling approaches, Journal of Hydrology, vol.406, issue.1-2, pp.1-15, 2011.
DOI : 10.1016/j.jhydrol.2011.05.026

Y. Guo, M. Markus, and M. Demissie, Uncertainty of nitrate-N load computations for agricultural watersheds, Water Resources Research, vol.3, issue.12, p.1185, 2002.
DOI : 10.1029/2001WR001149

A. Hill, Nitrate Removal in Stream Riparian Zones, Journal of Environment Quality, vol.25, issue.4, pp.743-755, 1996.
DOI : 10.2134/jeq1996.00472425002500040014x

P. Johnes, Uncertainties in annual riverine phosphorus load estimation: Impact of load estimation methodology, sampling frequency, baseflow index and catchment population density, Journal of Hydrology, vol.332, issue.1-2, pp.241-258, 2007.
DOI : 10.1016/j.jhydrol.2006.07.006

P. Jordan, A. Arnscheidt, H. Mcgrogan, and S. Mccormick, Characterising phosphorus transfers in rural catchments using a continuous bank-side analyser, Hydrology and Earth System Sciences, vol.11, issue.1, pp.372-381, 2007.
DOI : 10.5194/hess-11-372-2007

URL : https://hal.archives-ouvertes.fr/hal-00305622

Z. Kattan, J. Salleron, and J. Probst, Loadings and dnamics of nitrogen and phosphorus in the mosel basin (north-eastern france) Revue des Sciences de l, pp.435-459, 1986.

J. Kirchner, X. Feng, and C. Neal, Catchment-scale advection and dispersion as a mechanism for fractal scaling in stream tracer concentrations, Journal of Hydrology, vol.254, issue.1-4, pp.82-101, 2001.
DOI : 10.1016/S0022-1694(01)00487-5

B. Kronvang and A. Bruhn, CHOICE OF SAMPLING STRATEGY AND ESTIMATION METHOD FOR CALCULATING NITROGEN AND PHOSPHORUS TRANSPORT IN SMALL LOWLAND STREAMS, Hydrological Processes, vol.24, issue.11, pp.1483-1501, 1996.
DOI : 10.1002/(SICI)1099-1085(199611)10:11<1483::AID-HYP386>3.0.CO;2-Y

I. Littlewood, Hydrological regimes, sampling strategies, and assessment of errors in mass load estimates for United Kingdom rivers, Environment International, vol.21, issue.2, pp.211-220, 1995.
DOI : 10.1016/0160-4120(95)00011-9

F. Moatar and M. Meybeck, Compared performances of different algorithms for estimating annual nutrient loads discharged by the eutrophic River Loire, Hydrological Processes, vol.214, issue.211, pp.429-444, 2005.
DOI : 10.1002/hyp.5541

F. Moatar, G. Person, M. Meybeck, A. Coynel, H. Etcheber et al., The influence of contrasting suspended particulate matter transport regimes on the bias and precision of flux estimates, Science of The Total Environment, vol.370, issue.2-3, pp.515-531, 2006.
DOI : 10.1016/j.scitotenv.2006.07.029

B. Pellerin, B. Downing, C. Kendall, R. Dahlgren, T. Kraus et al., optical nitrate sensor and dual nitrate isotopes, Freshwater Biology, vol.71, issue.2, pp.376-387, 2009.
DOI : 10.1111/j.1365-2427.2008.02111.x

J. Phillips, B. Webb, D. Walling, and G. Leeks, Estimating the suspended sediment loads of rivers in the LOIS study area using infrequent samples, Hydrological Processes, vol.194, issue.195, pp.1035-1050, 1999.
DOI : 10.1002/(SICI)1099-1085(199905)13:7<1035::AID-HYP788>3.0.CO;2-K

S. Preston, V. Bierman, and S. Silliman, An evaluation of methods for the estimation of tributary mass loads, Water Resources Research, vol.13, issue.3, pp.1379-1389, 1989.
DOI : 10.1029/WR025i006p01379

J. Probst, Nitrogen and phosphorus exportation in the Garonne Basin (France), Journal of Hydrology, vol.76, issue.3-4, pp.281-305, 1985.
DOI : 10.1016/0022-1694(85)90138-6

J. Probst, Hydroclimatic fluctuations of some european rivers since 1800 -chapter 3 In Historical change of large alluvial rivers; Western Europe, pp.41-55, 1989.

J. Probst and Y. Tardy, Long range streamflow and world continental runoff fluctuations since the beginning of this century, Journal of Hydrology, vol.94, issue.3-4, pp.239-311, 1987.
DOI : 10.1016/0022-1694(87)90057-6

T. Rasmussen, C. Lee, and A. Ziegler, Estimation of constituent concentrations, loads, and yields in streams of johnson county, northeast kansas, using continuous water-quality monitoring and regression models, october 2002 through december, 2006.

D. Robertson and E. Roerish, Influence of various water quality sampling strategies on load estimates for small streams, Water Resources Research, vol.174, issue.5, pp.3747-3759, 1999.
DOI : 10.1029/1999WR900277

S. Rusjan, M. Brilly, and M. Mikos, Flushing of nitrate from a forested watershed: An insight into hydrological nitrate mobilization mechanisms through seasonal high-frequency stream nitrate dynamics, Journal of Hydrology, vol.354, issue.1-4, pp.187-2002, 2008.
DOI : 10.1016/j.jhydrol.2008.03.009

S. Shrestha, F. Kazama, and L. Newham, A framework for estimating pollutant export coefficients from long-term in-stream water quality monitoring data, Environmental Modelling & Software, vol.23, issue.2, pp.182-194, 2008.
DOI : 10.1016/j.envsoft.2007.05.006

D. Walling and B. Webb, The reliability of suspended sediment load data. In Erosion and Sediment Transport Measurement, Proc. Florence Symp, pp.177-194, 1981.

B. Webb, J. Phillips, D. Walling, I. Littlewood, C. Watts et al., Load estimation methodologies for British rivers and their relevance to the LOIS RACS(R) programme, Science of The Total Environment, vol.194, issue.195, pp.379-389, 1997.
DOI : 10.1016/S0048-9697(96)05377-6

B. Webb and D. Walling, Nitrate behaviour in streamflow from a grassland catchment in Devon, U.K., Water Research, vol.19, issue.8, pp.1005-1016, 1985.
DOI : 10.1016/0043-1354(85)90369-0