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Featured researches published by T Krueger.


Journal of Environmental Quality | 2008

Rethinking the contribution of drained and undrained grasslands to sediment-related water quality problems.

Gary Bilotta; Richard E. Brazier; Philip M. Haygarth; C. J. A. Macleod; P. Butler; Steven J. Granger; T Krueger; Jim Freer; John N. Quinton

Grass vegetation has been recommended for use in the prevention and control of soil erosion because of its dense sward characteristics and stabilizing effect on the soil. A general assumption is that grassland environments suffer from minimal soil erosion and therefore present little threat to the water quality of surface waters in terms of sediment and sorbed contaminant pollution. Our data question this assumption, reporting results from one hydrological year of observations on a field-experiment monitoring overland flow, drain flow, fluxes of suspended solids, total phosphorus (TP), and molybdate-reactive phosphorus (<0.45 mum) in response to natural rainfall events. During individual rainfall events, 1-ha grassland lysimeters yield up to 15 kg of suspended solids, with concentrations in runoff waters of up to 400 mg L(-1). These concentrations exceed the water quality standards recommended by the European Freshwater Fisheries Directive (25 mg L(-1)) and the USEPA (80 mg L(-1)) and are beyond those reported to have caused chronic effects on freshwater aquatic organisms. Furthermore, TP concentrations in runoff waters from these field lysimeters exceeded 800 mug L(-1). These concentrations are in excess of those reported to cause eutrophication problems in rivers and lakes and contravene the ecoregional nutrient criteria in all of the USA ecoregions. This paper also examines how subsurface drainage, a common agricultural practice in intensively managed grasslands, influences the hydrology and export of sediment and nutrients from grasslands. This dataset suggests that we need to rethink the conceptual understanding of grasslands as non-erosive landscapes. Failure to acknowledge this will result in the noncompliance of surface waters to water quality standards.


Hydrological Processes | 2006

Processes affecting transfer of sediment and colloids, with associated phosphorus, from intensively farmed grasslands: An overview of key issues

Philip M. Haygarth; Gary Bilotta; Roland Bol; Richard E. Brazier; P. Butler; Jim Freer; Laura J. Gimbert; Steven J. Granger; T Krueger; C. J. A. Macleod; Pamela S. Naden; Gareth H. Old; John N. Quinton; Barnaby P.G. Smith; Paul J. Worsfold


Journal of Hydrology | 2010

Comparative calculation of suspended sediment loads with respect to hysteresis effects (in the Petzenkirchen catchment, Austria)

A. Eder; Peter Strauss; T Krueger; John N. Quinton


Hydrological Processes | 2007

Processes affecting transfer of sediment and colloids, with associated phosphorus, from intensively farmed grasslands : a critical note on modelling of phosphorus transfers

T Krueger; Jim Freer; John N. Quinton; C. J. A. Macleod


European Journal of Soil Science | 2012

Comparing empirical models for sediment and phosphorus transfer from soils to water at field and catchment scale under data uncertainty

T Krueger; John N. Quinton; Jim E Freer; C. J. A. Macleod; Gary Bilotta; Richard E. Brazier; J. M. B. Hawkins; Philip M. Haygarth


Archive | 2011

EUROSEM: An evaluation of the dynamic capability of the EUROSEM model using GLUE

John N. Quinton; T Krueger; Jim E Freer; Richard E. Brazier; Gary Bilotta


Archive | 2006

14th International Soil Conservation Organization Conference. Water Management and Soil Conservation in Semi-Arid Environments. Marrakech, Morocco

John N. Quinton; Jim E Freer; T Krueger


Archive | 2015

Developing an improved sediment-specific biomonitoring tool: Combining expert knowledge and empirical data

Matthew Turley; Gary Bilotta; T Krueger; R.E. Brazier; Chris A. Extence


Archive | 2010

Limits of acceptability: A framework for combining data errors and modelling uncertainty to benchmark our predictive capability

Jim Freer; T Krueger; Keith Beven


Archive | 2010

Proceedings of the Ninth International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, Leicester, UK

T Krueger; Jim E Freer; John N. Quinton; C. J. A. Macleod; Gary Bilotta; R.E. Brazier; J. M. B. Hawkins; P. Haygarth

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