Application of the ‘snapshot’ methodology to a basin-wide analysis of phosphorus and nitrogen at stable low flow

Salvia, Mercé; Iffly, Jean François; Borght, Paul Vander; Sary, M.; Hoffmann, Lucien

doi:10.1007/978-94-017-2163-9_11

Cited by 14 publications

(12 citation statements)

References 12 publications

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“…A description of landscape-scale patterns in chemical outputs requires that the spatial variation of the discharge has the same resolution of sampling as sites for water chemistry (Grayson et al, 1997;Salvia et al, 1999). Thus in order to make a more adequate analysis of the factors creating downstream TOC patterns, one of the catchments (Ottervattsbäcken) from the 2000 study was resampled in August 2002.…”

Section: Introductionmentioning

confidence: 99%

Spatial variation in discharge and concentrations of organic carbon in a catchment network of boreal streams in northern Sweden

Temnerud¹,

Seibert²,

Jansson³

et al. 2007

Journal of Hydrology

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Section: Introductionmentioning

confidence: 99%

Spatial variation in discharge and concentrations of organic carbon in a catchment network of boreal streams in northern Sweden

Temnerud¹,

Seibert²,

Jansson³

et al. 2007

Journal of Hydrology

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“…This type of sampling provides information on spatial patterns at the landscape scale that enable insights to biogeochemical behavior throughout a stream network at low flow conditions. The goal of such sampling campaigns is often to infer the relation between landscape characteristics along a stream continuum and stream water quality (Grayson et al, 1997;Salvia et al, 1999, Wayland et al, 2003. This goal is in tune with emergent paradigms in freshwater ecology of river ecosystems as riverscapes which are closely connected with their catchment landscape (Fausch et al, 2002;Tetzlaff et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Incorporating landscape characteristics in a distance metric for interpolating between observations of stream water chemistry

Lyon

Seibert

Lembo

et al. 2008

Hydrol. Earth Syst. Sci.

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Abstract. Spatial patterns of water chemistry along stream networks can be quantified using synoptic or "snapshot" sampling. The basic idea is to sample stream water at many points over a relatively short period of time. Even for intense sampling campaigns, the number of sample points is limited and interpolation methods, like kriging, are commonly used to produce continuous maps of water chemistry based on the point observations from the synoptic sampling. Interpolated concentrations are influenced heavily by how distance between points along the stream network is defined. In this study, we investigate different ways to define distance and test these based on data from a snapshot sampling campaign in a 37-km 2 watershed in the Catskill Mountains region (New York State). Three distance definitions (or metrics) were compared: Euclidean or straight-line distance, in-stream distance, and in-stream distance adjusted according characteristics of the local contributing area, i.e., an adjusted in-stream distance. Using the adjusted distance metric resulted in a lower cross-validation error of the interpolated concentrations, i.e., a better agreement of kriging results with measurements, than the other distance definitions. The adjusted distance metric can also be used in an exploratory manner to test which landscape characteristics are most influential for the spatial patterns of stream water chemistry and, thus, to target future investigations to gain process-based understanding of in-stream chemistry dynamics.

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“…The rapid yet extensive spatial coverage was an objective of the current study, since sampling the whole river offers among others an identification of the river reaches which have a retention capacity of nutrients, or an increased selfpurification capacity (SALVIA et al, 1999). The water quality of the Pinios River progressively degraded from the source to the mouth.…”

Section: Discussionmentioning

confidence: 99%

Identification of the self-purification stretches of the Pinios River, Central Greece

Chatzinikolaou

Λαζαρίδου

2007

Medit. Mar. Sci.

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The Pinios River basin in Thessaly, Greece, is intensively farmed and heavily polluted with poorly treated domestic and industrial waste. The river was divided into 35 homogenous stretches. We investigated the self-purification capacity along the different stretches of the Pinios based on the responses of the benthic macroinvertebrate community to municipal, industrial and agricultural pollution in the basin. Water quality was assessed by the performance of six diversity and biotic indices and scores for assessing water quality. Self-purification found by the downstream amelioration of water quality was evident at five stretches. These stretches should be safeguarded and priority should be given to restoration projects along the most water-quality-degraded stretches that lack the capacity for self-purification.

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Application of the ‘snapshot’ methodology to a basin-wide analysis of phosphorus and nitrogen at stable low flow

Cited by 14 publications

References 12 publications

Spatial variation in discharge and concentrations of organic carbon in a catchment network of boreal streams in northern Sweden

Spatial variation in discharge and concentrations of organic carbon in a catchment network of boreal streams in northern Sweden

Incorporating landscape characteristics in a distance metric for interpolating between observations of stream water chemistry

Identification of the self-purification stretches of the Pinios River, Central Greece

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