Search results for: D.M. Lawler

Items from 1 to 10 out of 10 results

article

Modelling spatial and temporal variations of annual suspended sediment yields from small agricultural catchments

A. Rymszewicz, M. Bruen, J.J. O'Sullivan, J.N. Turner, more

Science of The Total Environment > 2018 > 619-620 > C > 672-684

Estimates of sediment yield are important for ecological and geomorphological assessment of fluvial systems and for assessment of soil erosion within a catchment. Many regulatory frameworks, such as the Convention for the Protection of the Marine Environment of the North-East Atlantic, derived from the Oslo and Paris Commissions (OSPAR) require reporting of annual sediment fluxes. While they may be...

article

The complexities of measuring fine sediment accumulation within gravel‐bed rivers

S.E. Harper, I.D.L. Foster, D.M. Lawler, K.L. Mathers, more

River Research and Applications > 33 > 10 > 1575 - 1584

Fine sediment storage within gravel beds is a key component of catchment sediment budgets and affects the health of benthic and hyporheic habitats. Here, we assess the performance of two substrate infiltration traps for the characterization of fine sediment (<2 mm) accumulation. One design, the vertically extending sediment trap, permits both lateral and vertical exchange in the sediment column,...

article

Measurement differences between turbidity instruments, and their implications for suspended sediment concentration and load calculations: A sensor inter-comparison study

A. Rymszewicz, J.J. O'Sullivan, M. Bruen, J.N. Turner, more

Journal of Environmental Management > 2017 > 199 > Complete > 99-108

The use of turbidity for indicating environmentally detrimental levels of suspended and colloidal matter in freshwater systems, and for defining acceptable water quality standards in national and European drinking water regulations, is well established. Turbidity is therefore frequently adopted as a surrogate for suspended sediment concentrations (SSC), or as a relative and objective measure of water...

article

A systematic quality assessment of Environmental Impact Statements in the oil and gas industry

B. Anifowose, D.M. Lawler, D. van der Horst, L. Chapman

Science of The Total Environment > 2016 > 572 > C > 570-585

The global economy relies heavily on oil and gas resources. However, hydrocarbon exploitation projects can cause significant impacts on the environment. But despite the production of numerous Environmental Impact Statements (EISs) to identify/mitigate such impacts, no study has specifically assessed the quality of EISs for both onshore and offshore oil and gas projects, with tested hypotheses. To...

article

Evaluating the relationship between biotic and sediment metrics using mesocosms and field studies

E. Conroy, J.N. Turner, A. Rymszewicz, M. Bruen, more

Science of The Total Environment > 2016 > 568 > C > 1092-1101

An ongoing research challenge is the detection of biological responses to elevated sediment and the identification of sediment-specific bioassessment metrics to evaluate these biological responses. Laboratory mesocosms and field observations in rivers in Ireland were used to evaluate the relationship between a range of biological and sediment metrics and to assess which biological metrics were best...

article

Advances in the continuous monitoring of erosion and deposition dynamics: Developments and applications of the new PEEP-3T system

D.M. Lawler

Geomorphology > 2008 > 93 > 1-2 > 17-39

In most episodic erosion and deposition systems, knowledge of the timing of geomorphological change, in relation to fluctuations in the driving forces, is crucial to strong erosion process inference, and model building, validation and development. A challenge for geomorphology, however, is that few studies have focused on geomorphological event structure (timing, magnitude, frequency and duration...

article

Turbidity dynamics during spring storm events in an urban headwater river system: The Upper Tame, West Midlands, UK

D.M. Lawler, G.E. Petts, I.D.L. Foster, S. Harper

Science of the Total Environment > 2006 > 360 > 1-3 > 109-126

Turbidity is an important water quality variable, through its relation to light suppression, BOD impact, sediment-associated contaminant transport, and suspended sediment effects on organisms and habitats. Yet few published field investigations of wet-weather turbidity dynamics, through several individual and sequenced rainstorms in extremely urbanised headwater basins, have emerged. This paper aims...

article

The importance of high-resolution monitoring in erosion and deposition dynamics studies: examples from estuarine and fluvial systems

D.M. Lawler

Geomorphology > 2005 > 64 > 1-2 > 1-23

Erosion and deposition processes lie at the centre of geomorphological explanation, but progress in understanding has been limited by a lack of appropriate high-resolution monitoring methodologies which permit detection of erosion and deposition dynamics. This paper presents a case for monitoring erosion and deposition at high temporal resolutions, and uses hypothetical approaches supported by example...

article

Use of continuous turbidity sensor in the prediction of fine sediment transport in the turbidity maximum of the Trent Estuary, UK

S.B. Mitchell, D.M. Lawler, J.R. West, J.S. Couperthwaite

Estuarine, Coastal and Shelf Science > 2003 > 58 > 3 > 645-652

Results from continuous monitoring of turbidity and water level at Burringham, on the tidal River Trent, UK, are presented for the period 18 May 1997 to 9 February 1998. These measurements, together with detailed readings of velocity and suspended sediment concentration over an individual tidal cycle near the opposite bank at Derrythorpe, help to describe the mechanisms and behaviour of the turbidity...

article

Measuring sediment exchange rates on an intertidal bank at Blacktoft, Humber Estuary, UK

S.B. Mitchell, J.S. Couperthwaite, J.R. West, D.M. Lawler

Science of the Total Environment > 2003 > 314-316 > Complete > 535-549

Results from a suite of Photo Electronic Erosion Pins (PEEPs) and manual pins installed on an intertidal bank at Blacktoft, near the confluence of the Rivers Trent and (Yorkshire) Ouse, UK are presented for summer 1997 (1 May-28 September). These reveal a pattern of erosion and deposition, which can be related to variations in tidal range, freshwater flow and wind speed over the period. During spring...

Filter options

Publication date

Set your own date range

INFONA - science communication portal

Search results for: D.M. Lawler

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options