Changing climate and nutrient transfers: Evidence from high temporal resolution concentration-flow dynamics in headwater catchments

Ockenden, Mary; Deasy, C.; Benskin, C.; Beven, Keith; Burke, Sean; Collins, Adrian L.; Evans, R.; Falloon, P. D.; Forber, Kirsty J.; Hiscock, Kevin M.; Hollaway, Michael; Kahana, Ron; Macleod, Christopher; Reaney, Sim; Snell, M. A.; Villamizar, Martha L.; Wearing, Catherine; Withers, P. J. A.; Zhou, Jian Guo; Haygarth, P. M.

doi:10.1016/j.scitotenv.2015.12.086

Cited by 125 publications

(117 citation statements)

References 68 publications

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“…A new set of 1.5 km convection-permitting model (CPM) and 12 km parameterised-convection model (PCM) simulations that focus on northern England and Scotland (northern UK; NUK) were completed in 2016 for a study predicting future changes in nutrient transfer in small river catchments (project NUTCAT2050; Ockenden et al 2016). These new simulations are driven by the same general circulation model (GCM) simulations (Mizielinski et al 2014) used in the SUK study.…”

Section: Introductionmentioning

confidence: 99%

Projected changes in extreme precipitation over Scotland and Northern England using a high-resolution regional climate model

et al. 2018

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The UK Met Office has previously conducted convection-permitting climate simulations over the southern UK (Kendon et al. in Nat Clim Change 4:570-576, 2014). The southern UK simulations have been followed up by a new set of northern UK simulations using the same model configuration. Here we present the mean and extreme precipitation projections from these new simulations. Relative to the southern UK, the northern UK projections show a greater summertime increase of return levels and extreme precipitation intensity in both 1.5 km convection-permitting and 12 km convection-parameterised simulations, but this increase is against a backdrop of large decreases in summertime mean precipitation and precipitation frequency. Similar to the southern UK, projected change is model resolution dependent and the convection-permitting simulation projects a larger intensification. For winter, return level increases are somewhat lower than for the southern UK. Analysis of model biases highlight challenges in simulating the diurnal cycle over high terrain, sensitivity to domain size and driving-GCM biases, and quality issues of radar precipitation observations, which are relevant to the wider regional climate modelling community.

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Section: Introductionmentioning

confidence: 99%

Projected changes in extreme precipitation over Scotland and Northern England using a high-resolution regional climate model

et al. 2018

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“…However, due to resource constraints and the complex temporal distribution of naturally transported fine sediment, these approaches are typically biased towards lower flows and concentrations (Carere et al, 2012;Johnes, 2007). These strategies rarely capture the state of the system when erosive processes, and connectivity across the catchment are most active (Ockenden et al, 2016;Perks et al, 2015), failing to reflect the nature of sedimentassociated pollutant transport at appropriately high temporal and spatial scales (Eriksson et al, 2007;Horsburgh et al, 2010). As such, these monitoring campaigns are not robust or rigorous enough to provide realistic estimates of fluxes, or average pollutant concentrations (Etchells et al, 2005;Gray, 1999;Irvine et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Use of spatially distributed time-integrated sediment sampling networks and distributed fine sediment modelling to inform catchment management

Perks

Warburton

Bracken

et al. 2017

Journal of Environmental Management

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“…Continuous automatic water sampling for estimation of nutrient removal has only been performed in a very restricted number of the wetlands created in agricultural field areas in Sweden. Further, estimations of annual phosphorus removal from water monitoring data in individual wetlands receiving water from agricultural fields are problematic due to that phosphorus transports are highly event-driven and concentration covaries strongly with water flow [14][15][16][17][18]. In this paper, we are approaching these problems.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we are approaching these problems. Several studies have shown that in runoff from agricultural fields, phosphorus is transported largely as particulate phosphorus [15][16][17][19][20][21][22]. Therefore, sedimentation is likely to be the predominant phosphorus removal process in wetlands receiving high phosphorus loads [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

National Large-Scale Wetland Creation in Agricultural Areas—Potential versus Realized Effects on Nutrient Transports

Weisner

Johannesson

Thiere

et al. 2016

Water

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During 2007During -2013, the Swedish Board of Agriculture granted support within a national program to about 1000 wetlands, corresponding to a 5300-hectare wetland area, with the dual goal to remove nutrients from water and to improve biodiversity in agricultural landscapes. The aim of the present study was to compare the effects on nutrient transports that are realized within the national program to what could be obtained with the same area of wetlands if location and design of wetlands were optimized. In single, highly nutrient-loaded wetlands, a removal of around 1000 kg nitrogen and 100 kg phosphorus per hectare wetland area and year was estimated from monitoring data. Statistical models were developed to estimate the overall nutrient removal effects of wetlands created within the national program. Depending on model, the effect of the national program as a whole was estimated to between 27 and 38 kg nitrogen and between 2.7 and 4.5 kg phosphorus per hectare created wetland area and year. Comparison of what is achieved in individual wetlands to what was achieved in the national program indicates that nutrient removal effects could be increased substantially in future wetland programs by emphasising location and design of wetlands.

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Changing climate and nutrient transfers: Evidence from high temporal resolution concentration-flow dynamics in headwater catchments

Cited by 125 publications

References 68 publications

Projected changes in extreme precipitation over Scotland and Northern England using a high-resolution regional climate model

Projected changes in extreme precipitation over Scotland and Northern England using a high-resolution regional climate model

Use of spatially distributed time-integrated sediment sampling networks and distributed fine sediment modelling to inform catchment management

National Large-Scale Wetland Creation in Agricultural Areas—Potential versus Realized Effects on Nutrient Transports

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