Streamflow generation in the Pang and Lambourn catchments, Berkshire, UK

Griffiths, James; Binley, Andrew; Crook, N.; Nutter, J.; Young, Andrew; Fletcher, Stephen

doi:10.1016/j.jhydrol.2006.04.044

Cited by 32 publications

(22 citation statements)

References 23 publications

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“…This is reflected by mean flow accretion of between 0.07 and 0.18 m 3 s 1 km 1 , between L3 and L7 . These findings are consistent with previous studies in this area (Bradford, 2002;Grapes et al, 2005;Grapes et al, 2006;Griffiths et al, 2006).…”

Section: Methods and Analysissupporting

confidence: 94%

Variability of dissolved CO<sub>2</sub> in the Pang and Lambourn Chalk rivers

Griffiths

Nutter

Binley³

et al. 2007

Hydrol. Earth Syst. Sci.

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This paper presents the results of a two-year field campaign to determine the spatial and temporal variability of groundwater interaction with surface waters in two Cretaceous Chalk catchments (the Pang and Lambourn) in the Upper Thames in Berkshire, UK, based on measurement of dissolved carbon dioxide (CO 2 ). Average stream water concentrations of dissolved CO 2 were up to 35 times the concentration at atmospheric equilibrium. Mean groundwater concentrations of 85 and 70 times the atmospheric equilibrium were determined from borehole water sampled in the Pang and Lambourn respectively. Diurnal and seasonal variation of in-stream concentration of dissolved CO 2 is not significant enough to mask the signal from groundwater inputs.

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Section: Methods and Analysissupporting

confidence: 94%

Variability of dissolved CO<sub>2</sub> in the Pang and Lambourn Chalk rivers

Griffiths

Nutter

Binley³

et al. 2007

Hydrol. Earth Syst. Sci.

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“…A greater understand of GW-SW process is also required in light of the European Water Framework Directive (CEC,WFD;2000/60/EC), which demands that all water bodies achieve targets for good chemical and ecological status and necessitates a holistic approach to the management of catchment hydrology. Recent studies have highlighted the complexity of GW-SW processes both in terms of spatial scales and temporal variability (Krause et al, 2007, Grapes et al, 2005, Griffiths et al, 2006 and have shown that the traditional classification of a particular river section as either gaining or losing are over-simplistic.…”

Section: Introductionmentioning

confidence: 99%

Interaction between groundwater, the hyporheic zone and a Chalk stream: a case study from the River Lambourn, UK

et al. 2010

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Understanding the processes controlling groundwater-surface water interaction is essential for effective resource management and for protecting sensitive ecosystems. Through intensive monitoring of Chalk groundwater, surface water, and shallow gravel groundwater along a river bank and below the river, using a combination of hydrochemical and hydrophysical techniques a complex pattern of interactions has been elucidated. The river is broadly in hydraulic contact with the river bed and adjacent gravels and sands (although with local variability), but these sediments are mainly hydraulically separate from the underlying Chalk at the site. The relationship between the river and underlying alluvium is variable, involving components of groundwater flow both parallel and transverse to the river and with both effluent and influent behaviour seen. The degree of groundwater-surface water interaction within the hyporheic zone at this site seems to be controlled by a number of factors including lithology, topography, and the local groundwater flow regime. While the gravel aquifer is significant in controlling groundwater-surface water interaction, its importance as a route for flow down the catchment is likely to be modest compared with river discharge.

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“…The upper reaches of the River Lambourn show 'bourne' or ephemeral behaviour, while the lower reaches show perennial behaviour (Grapes et al 2005;Griffiths et al 2006). This is supported by groundwater inputs and a slow hydrological response to rainfall that is typical of lowland permeable catchments.…”

Section: Geology and Hydrogeologymentioning

confidence: 99%

“…A greater understanding of GW-SW process is also required in light of the European Water Framework Directive (WFD 2000/60/EC), which requires that all water bodies achieve targets for good chemical and ecological status and necessitates a holistic approach to the management of catchment hydrology. Recent studies have highlighted the complexity of GW-SW processes both in terms of spatial scales and temporal variability (Gooddy et al 2006;Pretty et al 2006;Abesser et al 2008;) and have shown that the traditional classification of a particular river section as either gaining or losing is over-simplistic (Grapes et al 2005;Griffiths et al 2006). To date, there have been few studies that have focused on characterising dissolved, colloidal and particulate P within the hyporheic zone.…”

mentioning

confidence: 99%

Understanding Phosphorus Mobility and Bioavailability in the Hyporheic Zone of a Chalk Stream

Lapworth

Gooddy

Jarvie

2010

Water Air Soil Pollut

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This paper investigates the changes in bioavailable phosphorus (P) within the hyporheic zone of a groundwater-dominated chalk stream. In this study, tangential flow fractionation is used to investigate P associations with different size fractions in the hyporheic zone, groundwater and surface water. P speciation is similar for the river and the chalk aquifer beneath the hyporheic zone, with 'dissolved' P (<10 kDa) accounting for~90% of the P in the river and >90% in the deep groundwaters. Within the hyporheic zone, the proportion of 'colloidal' (<0.45 μm and >10 kDa) and 'particulate' (>0.45 μm) P is higher than in either the groundwater or the surface water, accounting for~30% of total P. Our results suggest that zones of interaction within the sand and gravel deposits directly beneath and adjacent to river systems generate colloidal and particulate forms of fulvic-like organic material and regulate bioavailable forms of P, perhaps through coprecipitation with CaCO 3 . While chalk aquifers provide some degree of protection to surface water ecosystems through physiochemical processes of P removal, where flow is maintained by groundwater, ecologically significant P concentrations (20-30 μg/L) are still present in the groundwater and are an important source of bioavailable P during baseflow conditions. The nutrient storage capacity of the hyporheic zone and the water residence times of this dynamic system are largely unknown and warrant further investigation.

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Streamflow generation in the Pang and Lambourn catchments, Berkshire, UK

Cited by 32 publications

References 23 publications

Variability of dissolved CO<sub>2</sub> in the Pang and Lambourn Chalk rivers

Variability of dissolved CO<sub>2</sub> in the Pang and Lambourn Chalk rivers

Interaction between groundwater, the hyporheic zone and a Chalk stream: a case study from the River Lambourn, UK

Understanding Phosphorus Mobility and Bioavailability in the Hyporheic Zone of a Chalk Stream

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Streamflow generation in the Pang and Lambourn catchments, Berkshire, UK

Cited by 32 publications

References 23 publications

Variability of dissolved CO&lt;sub&gt;2&lt;/sub&gt; in the Pang and Lambourn Chalk rivers

Variability of dissolved CO&lt;sub&gt;2&lt;/sub&gt; in the Pang and Lambourn Chalk rivers

Interaction between groundwater, the hyporheic zone and a Chalk stream: a case study from the River Lambourn, UK

Understanding Phosphorus Mobility and Bioavailability in the Hyporheic Zone of a Chalk Stream

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Variability of dissolved CO<sub>2</sub> in the Pang and Lambourn Chalk rivers

Variability of dissolved CO<sub>2</sub> in the Pang and Lambourn Chalk rivers