Mapping solute loadings in an area of Devon, England

Walling, Desmond E.; Webb, B.

doi:10.1002/esp.3290030108

Cited by 15 publications

(5 citation statements)

References 9 publications

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“…This process, commonly referred to as "snapshot sampling" (Grayson et al, 1997), involves the simultaneous collection of samples at a large number of nested sites within a catchment. Different authors have used this method explicitly to infer the abovementioned relationships between stream water chemistry and hydrochemically effective catchment characteristics (Walling and Webb, 1978;Eyre and Pepperell, 1999;Salvia et al, 1999;Wayland et al, 2003). Biggs et al (2002) used snapshot sampling to model the effect of deforestation on stream solute concentrations.…”

Section: Introductionmentioning

confidence: 99%

Water source characterization through spatiotemporal patterns of major, minor and trace element stream concentrations in a complex, mesoscale German catchment

Fröhlich

Frede

Huisman

et al. 2007

Hydrological Processes

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Abstract:The link between spatiotemporal patterns of stream water chemistry and catchment characteristics for the mesoscale Dill catchment (692 km 2 ) in Germany is explored to assess the catchment scale controls on water quality and to characterize water sources. In order to record the spatiotemporal pattern, 'snapshot sampling' was applied during low, mean and high flow, including 73 nested sites throughout the catchment. Water samples were analysed for the elements Li, B, Na, Mg, Al, K, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Rb, Sr, Mo, Ba, Pb and U using inductively-coupled-plasma mass spectrometry, and for electric conductivity and pH. Principle component analysis and hierarchical cluster analysis were used to find typical element associations and to group water samples according to their hydrochemical fingerprints. This revealed regional hydrochemical patterns of water quality which were subsequently related to catchment attributes to draw conclusions about the controls on stream chemistry. It was found that various lithologic signals and anthropogenic point source inputs controlled the base flow hydrochemistry. During increased flows, stream waters were diluted causing additional hydrochemical variability in response to heterogeneous precipitation inputs and differences in aquifer storage capacities. The hydrochemical patterns further displayed in-stream mixing of waters. This implied, that stream waters could be apportioned to the identified water sources throughout the catchment. The basin-wide hydrochemical variability has the potential to outrange the tracer signatures typically inferred in studies at the hillslope scale and is able to strongly influence the complexity of the catchment output. Both have to be considered for further catchment scale tracer and modelling work. Despite the likelihood of non-conservative behaviour, the minor and trace elements enhanced the rather qualitative discrimination of the various groundwater types, as the major cations were strongly masked by point source inputs.

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Section: Introductionmentioning

confidence: 99%

Water source characterization through spatiotemporal patterns of major, minor and trace element stream concentrations in a complex, mesoscale German catchment

Fröhlich

Frede

Huisman

et al. 2007

Hydrological Processes

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“…In recent years the quality of river water has received increased attention within those subfields of geography concerned with fluvial geomorphology, hydrology, biogeography, and resource analysis (Anderson and Burt, 1978;Douglas, 1972;Turvey, 1975; Walling and Webb, 1978). Geographers have generally neglected to study river transport of nitrogen, though, despite its important role in cultural eutrophication and the possible health hazards associated with high nitrate concentrations in supplies of drinking water.…”

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confidence: 98%

Nitrate‐nitrogen Flux and Utilization in a Stream Ecosystem During Low Summer Flows

Hill

1981

Canadian Geographies / Géographies canadiennes

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Analysis of nitrate transport in the downstream reaches of Duffin Creek, Ontario, revealed an average daily loss of 45 kg nitrate-N during low summer flows. The nitrate loss represents 50 per cent of the average daily input of total nitrogen and 75 per cent of the nitrate input received by these channel reaches. Nitrate uptake by benthic algae appears to account for a small portion of the NO3-removal. Laboratory experiments suggest that most of the nitrate disappearance from the river reaches is caused by bacterial denitrification and nitrate reduction in stream sediments.L'analyse du transport de nitrate dans I'etendue en aval de Duffin Creek, Ontario, a revele une perte journaliere moyenne de 45 kg de nitrate-N durant I'ecoulement affaibli des flots du ruisseau en ete. Cette perte de nitrate represente 50 pourcent de la moyenne journaliere du total d'azote fourni et 75 pourcent du nitrate r e p par l'etendue de ce canal. Les algues agrostides ne semblent Ctre responsable que d'une faible partie de ladisparition du NO,-. Des experiences en laboratoire suggerent que presque toute la disparition du nitrate dans la riviere est causee par la denitrification bacterienne et la reduction d'azote dans les sediments du cows d'eau.

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“…He believed the glaciation responsible to be the Wolstonian and assigned this an age of 130 ka. This gives a rate of removal of 92 m 3 km −2 a −1 , a unit which Walling and Webb (1978) 9-125 River Ouse and Adur, Sussex Collins (1981) 55-132 North Yorks Moors Arnett (1979) 19-54 River Tyne, Northumberland Hall (1967) 70-127 * The Bubnoff, whilst not universally popular, has the advantage that it is numerically the same as either the average rate of surface lowering expressed as mm ka -1 , or the rate of removal of material expressed as m 3 a -1 km -2 . † This value was erroneously reported by Saunders and Young (1983) has the same numerical value as the Bubnoff, so it is not clear how Saunders and Young arrived at their converted figure.…”

Section: Published Data On Rates Of Denudationmentioning

confidence: 99%

The rate of denudation of some British lowland landscapes

Clayton

1997

Earth Surf. Process. Landforms

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Developments in dating techniques applicable to the late Tertiary and Quaternary are giving us the ability to date past land surfaces. Where reasonable assumptions about the nature of such past surfaces and their partial preservation may be made, they can be reconstructed. This permits the contouring and measurement of the subsequent dissection, allowing not only calculation of the average rate of erosion over the elapsed time, but also information on the pattern of incision. Two examples where this has been attempted are present; both are dissected till surfaces in eastern England, one of Anglian and the other of Devensian age. The approach quantifies the disparity between the incision of valleys and the general denudational lowering of the surface which characterizes many landscapes. The technique is not only of academic interest, but potentially forms a useful line of approach to the assessment of the safety of the burying toxic wastes.

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Mapping solute loadings in an area of Devon, England

Cited by 15 publications

References 9 publications

Water source characterization through spatiotemporal patterns of major, minor and trace element stream concentrations in a complex, mesoscale German catchment

Water source characterization through spatiotemporal patterns of major, minor and trace element stream concentrations in a complex, mesoscale German catchment

Nitrate‐nitrogen Flux and Utilization in a Stream Ecosystem During Low Summer Flows

The rate of denudation of some British lowland landscapes

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