
Sarah HallidayUniversity of Dundee · Division of Energy Environment and Society
Sarah Halliday
BSc, MSc, PhD
Associate of the UNESCO Centre for Water Law, Policy and Science
About
31
Publications
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Introduction
Water is our most precious natural resource and critical to the achievement of the United Nations SDGs. I am a hydrologist, and my research interests lie in the field of environmental monitoring and modelling with a particular interest in the application of novel technologies and analysis approaches. My work focuses on understanding how our freshwater environments function and how they respond to different drivers of change (land-use, climatic) and pressures (pollution, abstraction).
Additional affiliations
Education
September 2009 - September 2012
September 2006 - August 2007
September 2002 - May 2006
Publications
Publications (31)
New scientific understanding is catalysed by novel technologies that enhance measurement precision, resolution or type, and that provide new tools to test and develop theory. Over the last 50 years, technology has transformed the hydrologic sciences by enabling direct measurements of watershed fluxes (evapotranspiration, streamflow) at time scales...
Dissolved oxygen (DO) concentrations showed a striking pattern in a multi-year study of the River Enborne, a small river in SE England. In each of three years (2010-2012), maximum DO concentrations were attained in mid-April, preceded by a period of steadily increasing diurnal amplitudes, followed by a steady reduction in both amplitude and concent...
This paper describes the hydrochemistry of a lowland, urbanised river-system, The Cut in England, using in situ sub-daily sampling. The Cut receives effluent discharges from four major sewage treatment works serving around 190,000 people. These discharges consist largely of treated water, originally abstracted from the River Thames and returned via...
This paper reports the results of a 2-year study of water quality in the River Enborne, a rural river in lowland England. Concentrations of nitrogen and phosphorus species and other chemical determinands were monitored both at high-frequency (hourly), using automated in situ instrumentation, and by manual weekly sampling and laboratory analysis. Th...
Streamwater nitrate dynamics in the River Hafren, Plynlimon, mid-Wales were investigated over decadal to sub-daily timescales using a range of statistical techniques. Long-term data were derived from weekly grab samples (1984–2010) and high-frequency data from 7-hourly samples (2007–2009) both measured at two sites: a headwater stream draining moor...
An invesigation of specific emerging contaminants in water supplies and implications for drinking water quality
Analysis of current evidence on the risks of climate change for water availability in Scotland
Drought can have a negative impact on the quality of drinking water. Private water supplies (PWS), which are the responsibility of the owner and are not provided through Scottish Water mains network, provide water to more than 4% of the Scottish population, as well as key industries such as tourism and whisky. We examine the relationship between dr...
Recent studies have demonstrated that projected climate change will likely enhance nitrogen (N) and phosphorus (P) loss from farms and farmland, with the potential to worsen freshwater eutrophication. Here, we investigate the relative importance of the climate and land use drivers of nutrient loss in nine study catchments in Europe and a neighborin...
Septic tank systems (STS) are private sewage treatment facilities which typically serve the population not connected to main sewer networks. There is substantial uncertainty about the impact of septic tanks on water quality, primarily because of a lack of information about the location, number and condition, and inadequate monitoring of the effects...
This project aimed to understand the likely impact of water quality on ecosystem services, including risk to health and food security (crops and fisheries) within a risk-based framework. Risk = Hazard * Vulnerability Hazard was derived as likely exposure to pollution, using available data on land cover; industry location ; fertiliser application; i...
Abstract INCA-P is a dynamic, catchment-scale phosphorus model which has been widely applied during the last decade. Since its original release in 2002, the model structure and equations have been significantly altered during several development phases. Here, we provide the first full model description since 2002 and then test the latest version of...
The key results from the application of catchment-scale biophysical models to assess the likely effectiveness of nutrient pollution mitigation measures set in the context of projected land management and climate change are presented. The assessment is based on the synthesis of modelled outputs of daily river flow, river and lake nitrogen and phosph...
The key results from the application of catchment-scale biophysical models to eight river-systems across Europe to assess the effects of projected environmental change (change in climate, land use, nitrogen deposition and water use) on water quantity and quality will be presented. Together the eight sites represent a sample of key climate and land...
The EU Water Framework Directive (WFD) requires that the ecological and chemical status of water bodies in Europe should be assessed, and action taken where possible to ensure that at least "good" quality is attained in each case by 2015. This paper is concerned with the accuracy and precision with which chemical status in rivers can be measured gi...
The EU Water Framework Directive (WFD) requires that the ecological and chemical status of water bodies in Europe should be assessed, and action taken where possible to ensure that at least "good" quality is attained in each case by 2015. This paper is concerned with the accuracy and precision with which chemical status in rivers can be measured gi...
This paper reviews the implications of climate change for the water environment and its management in England. There is a large literature, but most studies have looked at flow volumes or nutrients and none have considered explicitly the implications of climate change for the delivery of water management objectives. Studies have been undertaken in...
This data set comprises of hourly physical and nutrient monitoring data of the River Enborne near Brimpton (National grid reference SU568648), from November 2009 to February 2012. Parameters measured are total reactive phosphorus, nitrate, conductivity, temperature, dissolved oxygen, pH and total chlorophyll. The accompanying hourly averaged flow d...
This data set comprises of hourly physical and nutrient monitoring data of The Cut at Bray Marina (National grid reference SU915786), from May 2010 to February 2012. Parameters measured are total phosphorus, total reactive phosphorus, ammonium, conductivity, temperature, dissolved oxygen, pH and total chlorophyll. The accompanying hourly averaged f...
Streamwater nitrate dynamics in the River Hafren, Plynlimon, mid-Wales were investigated over decadal to sub-daily timescales using a range of statistical techniques. Long-term data were derived from weekly grab samples (1984–2010) and high-frequency data from 7 hourly samples (2007–2009) both measured at two sites: a headwater stream draining moor...
This paper introduces new insights into the hydrochemical functioning of lowland river systems using field-based spectrophotometric and electrode technologies. The streamwater concentrations of nitrogen species and phosphorus fractions were measured at hourly intervals on a continuous basis at two contrasting sites on tributaries of the River Thame...
This paper introduces new insights into the hydrochemical functioning of
lowland river-systems using field-based spectrophotometric and electrode
technologies. The streamwater concentrations of nitrogen species and
phosphorus fractions were measured at hourly intervals on a continuous
basis at two contrasting sites on tributaries of the River Thame...
Model-based assessments of the impacts of environmental change on
European freshwater ecosystems are needed to aid informed resource
management. This talk will focus on how such model-based assessments can
be improved using the latest results from in-situ, continuous sub-daily
water quality monitoring in upland and lowland UK river systems. Two
cat...
This paper examines two hydrochemical time-series derived from stream samples taken in the Upper Hafren catchment, Plynlimon, Wales. One time-series comprises data collected at 7-hour intervals over 22 months (Neal et al., 2012-this issue), while the other is based on weekly sampling over 20 years. A subset of determinands: aluminium, calcium, chlo...