Spatial and temporal variations in surface water nitrate concentrations in a mixed land use catchment under humid temperate climatic conditions

Herpe, Yves Van; Troch, P. A.

doi:10.1002/1099-1085(20001015)14:14<2439::aid-hyp105>3.0.co;2-h

Cited by 40 publications

(28 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…geology, Richards et al 1997). The modification of farming practices and the reduction of hedgerow networks generate an increase in solute inputs to the streams (Arheimer & Liden 2000, Van Herpe & Troch 2000, with potential oxygen depletion and river eutrophication (Mulholland et al 1984, Gulis & Suberkropp 2003. The increase in field size and the destruction of riparian vegetation also induce an increase in fine sediment inputs into streams (Stevens & Cummins 1999, Quinn & Stroud 2002, with potential stream bed clogging (Culp et al 1983, Quinn et al 1992, Hancock 2002, changes in the chemical characteristics of interstitial water (Dahm et al 1998) and in the composition of interstitial assemblages (Boulton et al 1998).…”

Section: Introductioncontrasting

confidence: 88%

Effects of catchment disturbance on stream invertebrates: comparison of different habitats (vegetation, benthic and interstitial) using bio-ecological groups.

Sarriquet

Delettre

Marmonier

2006

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

The intensification of agriculture has drastically modified the structure of rural landscapes, changing field size, destructing hedgerow networks, and increasing nutrients and fine sediments fluxes to rivers. To evaluate the effects of these disturbances at the catchment scale, we studied the surface and interstitial water chemistry and the invertebrate assemblages in three different habitats: the vegetation, the benthic, and the interstitial. Six headwater streams ranging from undisturbed to disturbed forests (wind-fallen area) and from traditional agriculture to intensive farming areas were studied. Differences between forested and agricultural streams lie in changes in water chemistry, in habitat quality, and in the composition of the assemblages with little reduction in species richness. The forested streams were only disturbed by large-scale modifications of their catchments (i.e. wind-fallen area along the stream), which made the invertebrate assemblages similar to those of agricultural streams, even if water characteristics were not modified. In contrast, large scale modifications of landscape structure near the agricultural streams (hedgerow removal) had little effect on the fauna, but the destruction of the riparian strip (with direct access of the cattle to the river) profoundly affected the system with drastic modifications of in-stream habitat quality and invertebrate assemblage composition. The effects of these disturbances differed according to the habitat considered, with increasing differences between assemblages from the interstitial, to the benthic, and to the vegetation habitats. Finally, groups of organisms based on bioecological traits appeared as efficient tools for the evaluation of catchment disturbances, at least for the benthic and the vegetation fauna.

show abstract

Section: Introductioncontrasting

confidence: 88%

Effects of catchment disturbance on stream invertebrates: comparison of different habitats (vegetation, benthic and interstitial) using bio-ecological groups.

Sarriquet

Delettre

Marmonier

2006

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

show abstract

“…This dilution of streamwater NO 3 -during storm events has been observed in other agricultural systems , although increasing concentrations with increasing discharge have also been observed (e.g. Van Herpe and Troch, 2000). Hence, it is generally considered that NO 3 -reacts inconsistently to changes in discharge which leads to complex hysteresis patterns (e.g.…”

Section: Concentrations and Sources Of Nhmentioning

confidence: 99%

Catchment land use effects on fluxes and concentrations of organic and inorganic nitrogen in streams

Vogt

Braban

Dragosits

et al. 2015

Agriculture, Ecosystems & Environment

View full text Add to dashboard Cite

Michael F. 2015. Catchment land use effects on fluxes and concentrations of organic and inorganic nitrogen in streams.Contact CEH NORA team at noraceh@ceh.ac.ukThe NERC and CEH trademarks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. ) and dissolved organic nitrogen (DON) in two adjacent Scottish catchments with contrasting land use (agricultural grassland vs. semi-natural moorland). Inter-and intra-catchment variation in N species and the relation to spatial differences in agricultural land use were studied by determining catchment N input through agricultural activities at the field scale and atmospheric inputs at a 25 m grid resolution. The average agricultural N input of 52 kg N ha -1 yr -1 to the grassland catchment was more than four times higher than the input of 12 kg N ha -1 yr -1 to the moorland catchment, supplemented by 12.3 and 8.2 kg N ha -1 yr -1 through atmospheric deposition, respectively. The grassland catchment was associated with an annual downstream total dissolved nitrogen (TDN) flux of 14.4 kg N ha -1 yr -1, which was 66% higher than the flux of 8.7 kg ha -1 yr -1 from the moorland catchment. This difference was largely due to the NO 3 -flux being one order of magnitude higher in the grassland catchment. Dissolved organic N fluxes were similar for the two catchments (7.0 kg ha -1 yr -1 ) with DON contributing 49% to the TDN flux in the grassland compared with 81% in the moorland catchment. The results highlight the importance of diffuse agricultural N inputs to stream NO 3 -concentrations and the importance of quantifying all the major aquatic N species for developing a better understanding of N transformations and transport in the atmosphere-soil-water system.

show abstract

“…This so-called flushing phenomenon has been observed in numerous catchments (Van Herpe and Troch, 2000;Andersson and Lepistö, 1998;Creed et al, 1996;Moldan et al, 1995). It is ascribed to rapid nitrogen leaching from the topsoil during transient saturation after dry periods when nitrogen accumulated due to mineralisation that exceeded uptake by plants and microbes (Creed et al, 1996).…”

Section: Discussionmentioning

confidence: 99%

Comparative simulation of the nitrogen dynamics using the INCA model and a neural network analysis: implications for improved nitrogen modelling

Lischeid

Langusch

2004

Hydrol. Earth Syst. Sci.

View full text Add to dashboard Cite

Continuing deposition of nitrogen in forested catchments affects stream and groundwater quality. However, the dependence of nitrogen dynamics on climatic and hydrological boundary conditions is still poorly understood. These dynamics have been investigated by applying the process-oriented Integrated Nitrogen in CAtchments (INCA) model and an artificial neural network to the data set from the forested Steinkreuz catchment in South Germany. The data comprise daily values of precipitation, air temperature and discharge of the catchment runoff. The INCA model simulated the mean nitrate concentration in the stream as well as seasonal fluctuations but it underestimated the short-term variance of the observed stream water nitrate concentration, especially the pronounced concentration peaks in late summer. In contrast, the artificial neural network matched the short-term dynamics using non-linear regressions with stream discharge and air temperature data. The results provide strong evidence that the short-term dynamics of stream nitrate concentration during storm-flow were generated in the riparian zone, which is less than 1% of the catchment area, and is not considered explicitly in the INCA model. The concentration peaks have little effect on the catchments nitrogen budget and the shallow groundwater data suggest that the short-term hydrological dynamics also govern groundwater recharge in the upland parts of the catchment. This substantial underestimate by the INCA model parameterisation is balanced by a corresponding underestimate of denitrification in clayey layers of the deeper aquifer. A better understanding of these processes is necessary to improve long-term risk assessments.

show abstract

Spatial and temporal variations in surface water nitrate concentrations in a mixed land use catchment under humid temperate climatic conditions

Cited by 40 publications

References 39 publications

Effects of catchment disturbance on stream invertebrates: comparison of different habitats (vegetation, benthic and interstitial) using bio-ecological groups.

Effects of catchment disturbance on stream invertebrates: comparison of different habitats (vegetation, benthic and interstitial) using bio-ecological groups.

Catchment land use effects on fluxes and concentrations of organic and inorganic nitrogen in streams

Comparative simulation of the nitrogen dynamics using the INCA model and a neural network analysis: implications for improved nitrogen modelling

Contact Info

Product

Resources

About