A model reconstruction of riverine nutrient fluxes and eutrophication in the Belgian Coastal Zone since 1984

Passy, Paul; Gypens, Nathalie; Billen, Gilles; Garnier, Josette; Thieu, Vincent; Rousseau, Véronique; Callens, Julie; Parent, Jean-Yves; Lancelot, Christiane

doi:10.1016/j.jmarsys.2013.05.005

Cited by 83 publications

(71 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Mainly targeting urban point sources, this policy led to massive decreases of carbon, ammonium and phosphorus emissions to rivers and considerably improved surface waters quality (Bouraoui and Grizzetti, 2011;Garnier et al, 2013;Passy et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The response of river nitrification to changes in wastewater treatment (The case of the lower Seine River downstream from Paris)

Aissa-Grouz

Garnier

Billen

et al. 2015

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

-In the early 2000s, most of the effluents from the Paris agglomeration (12 million inhabitants) were still discharged after only a standard activated sludge treatment of carbon, thus releasing a high ammonium load. This triggered the growth of nitrifying bacteria in the river and caused a deficit of dissolved oxygen concentration 200 km downstream, at the entrance of the estuarine area. From 2007 on, improvements of the wastewater treatment plant (WWTP) helped to nitrify most of the ammonium, and to denitrify 70% of the nitrate produced since 2012. This paper documents the effect of these recent changes in the treatment of Paris effluents, based on measurements of nitrogen species concentrations and nitrifying activities along longitudinal profiles of the lower Seine River. These observations are put into perspective with respect to previous observations, and a modeling approach is developed to evidence the role of ammonium and nitrifying organisms released with the WWTP effluents into the receiving water body. Today, a larger biomass of ammoniumoxidizing microbes is being discharged by the WWTP, but the microorganisms released do not grow, possibly because of the low substrate in the river. The same is true for nitrite-oxidizing microbes, which explains the persistence of nitrite often discharged with the effluents because of incomplete nitrification and/or denitrification in the treatment line. Taking into account the development of microbial populations of nitrifying organisms is essential to explain the observed spatial and temporal pattern of the nitrogen species.

show abstract

Section: Introductionmentioning

confidence: 99%

The response of river nitrification to changes in wastewater treatment (The case of the lower Seine River downstream from Paris)

Aissa-Grouz

Garnier

Billen

et al. 2015

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

show abstract

“…As an example, the Seneque-Riverstrahler model, developed for calculating water quality of large river basins, such as the Seine watershed, is able to explore possible agricultural scenarios (Thieu et al 2011) and their impact at the coastal zone in terms of eutrophication (Garnier et al 2010;Passy et al 2013). …”

mentioning

confidence: 99%

Nitrate leaching from organic and conventional arable crop farms in the Seine Basin (France)

Benoît

Garnier

Anglade

et al. 2014

Nutr Cycl Agroecosyst

View full text Add to dashboard Cite

In the Seine Basin, characterised by intensive arable crops, most of the surface and groundwater is contaminated by nitrate (NO 3 -). The goal of this study is to investigate nitrogen leaching on commercial arable crop farms in five organic and three conventional systems. In 2012-2013, a total of 37 fields are studied on eight arable crop rotations, for three different soil and climate conditions. Our results show a gradient of soil solution concentrations in function of crops, lower for alfalfa (mean 2.8 mg NO 3 -N l . For a full rotation, the estimated mean concentrations is lower for organic farming, 12 ± 5 mg NO 3 -N l -1 than for conventional farming 24 ± 11 mg NO 3 -N l -1 , with however a large range of variability. Overall, organic farming shows lower leaching rates (14-50 kg NO 3 -N ha ). Overall, we show that organic farming systems have lower impact than conventional farming on N leaching, although there is still room for progress in both systems in commercial farms.

show abstract

“…The RIVERSTRAHLER model (Garnier et al, 2002) describes carbon and nutrient transformations along the river system as a function of meteorological conditions and a GIS (geographic information system) description of human activity on the watershed (Billen et al, 2001(Billen et al, , 2005Passy et al, 2013). The coastal model is implemented in a multi-box 0D frame (Lancelot et al, 2005) from the Western Channel to the Belgian Coastal Zone (BCZ) using the 10-days RIVERSTRAHLER input as river forcing, forced by daily wind speed, sea surface temperature (SST), monthly atmospheric pCO 2 , daily global solar radiation (climatology for 1989-1999) and river DIC and TA inputs (Seine and Scheldt rivers) computed as a function of freshwater discharge (Gypens et al, 2009).…”

Section: Methodsmentioning

confidence: 99%

How phosphorus limitation can control climate-active gas sources and sinks

Gypens

Borges

Ghyoot

2017

Journal of Marine Systems

View full text Add to dashboard Cite

Since the 1950's, anthropogenic activities have increased nutrient river loads to European coastal areas. Subsequent implementation of nutrient reduction policies have led to considerably reduction of phosphorus (P) loads from the mid-1980's, while nitrogen (N) loads were maintained, inducing a P limitation of phytoplankton growth in many eutrophied coastal areas such as the Southern Bight of the North Sea (SBNS). When dissolved inorganic phosphorus (DIP) is limiting, most phytoplankton organisms are able to indirectly acquire P from dissolved organic P (DOP). We investigate the impact of DOP use on phytoplankton production and atmospheric fluxes of CO 2 and dimethylsulfide (DMS) in the SBNS from 1951 to 2007 using an extended version of the R-MIRO-BIOGAS model. This model includes a description of the ability of phytoplankton organisms to use DOP as a source of P. Results show that primary production can increase up to 30% due to DOP uptake under limiting DIP conditions. Consequently, simulated DMS emissions also increase proportionally while CO 2 emissions to the atmosphere decrease, relative to the reference simulation without DOP uptake.

show abstract

A model reconstruction of riverine nutrient fluxes and eutrophication in the Belgian Coastal Zone since 1984

Cited by 83 publications

References 75 publications

The response of river nitrification to changes in wastewater treatment (The case of the lower Seine River downstream from Paris)

The response of river nitrification to changes in wastewater treatment (The case of the lower Seine River downstream from Paris)

Nitrate leaching from organic and conventional arable crop farms in the Seine Basin (France)

How phosphorus limitation can control climate-active gas sources and sinks

Contact Info

Product

Resources

About