River Axe - Water Quality Analysis (2001)
Darren Randell and Neil Murdoch, Environment Agency SW
This report analyses the spatial and temporal variations of orthophosphate
concentrations in the River Axe, Devon. The impacts from significant
point sources are identified The analysis is done using the LAPWING
software.(2001)
River Lynher - Water Quality Analysis
(2000)
Darren Randell and Neil Murdoch, Environment Agency SW
As part of the Agency contribution to a collaborative project with
Cornwall County Council, nutrient loads and concentrations along the
River Lynher are analysed to identify the spatial and temporal trends
to aid understanding of the catchment issues.
River Tone Water Quality Model (2000)
Darren Randell and Neil Murdoch, Environment Agency SW
Using a water quality model (QUASAR), the impact of major discharges
from Wellington and Taunton Sewage Treatment Works on orthophosphate
concentrations in the River Tone are determined.
Upper River Avon (Bristol) Water Quality Model (2000)
Darren Randell and Neil Murdoch, Environment Agency SW
This report assesses the impact of discharges, from Malmesbury and
Wootton Bassett STWs, on orthophosphate concentrations in the (upper)
Bristol Avon. The part of the river modelled is from Westport to Bourne
Brooke. The model uses the QUASAR software.
Lower River Avon (Bristol)
Water Quality Model (1997)
Neil Murdoch, Environment Agency SW
This report examines the impact of discharges from 9 major Sewage
Treatment Works on phosphate loads and concentrations in the Bristol
Avon from Chippenham done to Hanham (near Avonmouth).
Stour River (Dorset) Water Quality
Model (1996)
Neil Murdoch, Environment Agency SW
This report assesses the impact of discharges, from 5 major sewage
treatment works, on nutrient (orthophosphate and nitrogen) concentrations
in the (lower) River Stour. The part of the river modelled is from
just below Blandford Forum to Christchurch. The model uses the QUASAR
software
River Frome (Dorset) Water Quality
Model (1996)
Neil Murdoch, Environment Agency SW
This report quantifies the impact of discharges from Dorchester STW
on the nutrient levels in the River Frome between Dorchester and Wareham.
Otter Valley Model Run (1994)
Neil Murdoch, Environment Agency SW
A groundwater model of the Otter Valley is used to predict river flows
under a number of abstraction scenarios.
Hampshire Avon
Analysis and modelling of Phosphorus (2003)
Tom Ash, Jessica Madge and Neil Murdoch, Environment Agency SW
Diffuse and point sources of phosphorus within the catchment are quantified.
The impacts from these sources is then evaluated using a SIMCAT model.
Hampshire Avon Hindcast Study (2002)
Anna Cook, Dave Welch, Neil Nurdoch, Environment Agency
Diffuse and point sources of nutrients (phosphorus and nitrogen) within
the catchment are quantified using the export coefficient method and
analysis of sewage treatment works data. Crop and animal information
are from the DEFRA census. The report examines how nutrient loadings
have varied over time, going back to the 1950s.
Upper Hampshire Avon - Analysis
and Modelling of Phosphates (1998)
Neil Murdoch, Environment Agency SW
In this report statistical analysis and modelling of orthophosphate
concentrations in the upper Hampshire Avon are examined with a view
to quantifying the relative impacts from point and diffuse sources.
Date are analysed using the Lapwing software and QUASAR is used to
model the river system.
Lower River Avon (Hampshire)
Water Quality Model (1997)
Neil Murdoch, Environment Agency SW
The impact of discharges from Salisbury Sewage Treatment Works on
orthophosphate concentration in the Hampshire Avon river is examined.
The model (QUASAR) covers the length of the River from Salisbury to
Christchurch.
River Wylye Water Quality Model (2001)
Darren Randell and Neil Murdoch, Environment Agency SW
The relative contribution of orthophosphate discharges from Warminster
Sewage Treatment Works on concentrations in the River Wylye is estimated
using a water quality model (QUASAR).
Somerset levels
Nutrient Budgets in the Brue (2002)
Neil Murdoch, Simon Culling, Dave Welch, Anna Cook
Environment Agency SW
Phosphorus and Nitrogen source loads in the Brue Catchment are compared
with estimated river loads so as to help identify those inputs significant
for the river.
Nutrient Sources in the Brue Catchment (2002)
Anna Cook, Dave Welch, Neil Murdoch, Environment Agency SW
Phosphorus and Nitrogen source loads in the Brue Catchment are quantified.
Point sources are quantified from population data and diffuse sources
via the export coefficient method, using DEFRA data.
Estuaries
Poole Harbour Water Quality Model
(Nitrogen) (2001)
Neil Murdoch, Environment Agency SW
This reports on the freshwater and point source impacts on nitrogen
concentrations in Poole Harbour over an annual cycle. The modelling
software used is ECOS. (2001)
Axe Estuary Water Quality Model (1996)
Celia Bartlett and Neil Murdoch, Environment Agency SW
This reports on the freshwater and point source impacts on nitrogen
and orthophosphate concentrations in Axe Estuary over an annual cycle.
The modelling software used is ECOS. (1996)
Taw Estuary Water Quality Model (1997)
Celia Bartlett and Neil Murdoch, Environment Agency SW
This reports on the freshwater and point source impacts on nitrogen
and orthophosphate concentrations in Taw Estuary over an annual cycle.
The modelling software used is ECOS.
Loe Pool (Cornwall) Water Quality Model
(1997)
Neil Murdoch, Environment Agency SW
This report examines the impact of discharges from Helston Sewage
Treatment Works on orthophosphate concentrations in Loe Pool. The contributions
from freshwater flows are also considered. The modelling software used
is ECOS.
Dart Estuary Water Quality Model (Nitrogen)
(2001)
Neil Murdoch, Environment Agency SW
This reports on the freshwater and point source impacts on nitrogen
concentrations in Dart Estuary over an annual cycle. The contribution
from Totnes Sewage Treatment works is included .The modelling software
used is ECOS.
Exe Estuary Water Quality Model (Nitrogen)
(2001)
Neil Murdoch, Environment Agency SW
This reports on the freshwater and point source impacts on nitrogen
concentrations in Dart Estuary over an annual cycle. The contribution
from Countess Wear Sewage Treatment works is included .The modelling
software used is ECOS.
Fal estuary
Fal Estuary (2000)
Neil Murdoch, Environment Agency SW
This short report assesses the nitrogen load contributions to the
Fal Estuary.
TBT Model Predictions in the Fal Estuary for
Pre and Post Treatment Dockyard Effluent Scenarios (2003)
Neil Murdoch, Environment Agency SW
Using the ECOS model, TBT concentrations in the estuary are predicted
over a number of scenarios. The time for the estuary to recover is
also estimated.
Fowey Estuary - Preliminary Water
Quality Analysis for UWWTD (2001)
Neil Murdoch, Environment Agency SW
This report identifies and quantifies the nitrogen loads to the Fowey
Estuary. (2001)
Fal Estuary
Truro-Tresillian Water Quality Model – Summer Simulations (1996)
Neil Murdoch, Environment Agency SW
This reports on the freshwater and point source impacts on nitrogen
concentrations in the Truro-Tresillian Estuary over an annual cycle.
The contributions from Newham and Ladock Wear Sewage Treatment works
are included .The modelling software used is ECOS.
Truro-Tresillian Loads (Brief Note) (1996)
Neil Murdoch, Environment Agency SW
Addendum to the main estuary model quantifying the loads contributed
by the various inputs to the system.
Industry
Fleet Lagoon - Nutrient
Load Impact Modelling . (1999)
Neil Murdoch, Environment Agency SW
This reports on the freshwater and point source impacts on nitrogen
and orthophosphate concentrations in the Fleet Lagoon over an annual
cycle. The contributions from swans and wildfowl are included .The
modelling software used is ECOS.
Avonmouth
Bristol Air Quality Modelling – Terrain Effects (2002)
Neil Murdoch, Environment Agency SW
The impact of terrain on ground level concentrations from SO2 emissions
from Avonmouth is compared using ADMS and AERMOD systems.
Bristol ZIP (2001)
Neil Murdoch, Environment Agency SW
Bristol Air Quality Model – Sulphur Dioxide
This report identifies the various industrial sources which contribute
to Sulphur Dioxide concentrations in the Bristol vicinity. Their impact
is quantified using air dispersion modelling. The sources considered
are Britannia Zinc, Sevalco, Llanwern, Didcot and Aberthaw.
Bristol ZIP (Avonmouth sources only) (2000)
Neil Murdoch, Environment Agency SW
This reports on air quality modelling of current and future authorized
Part A releases from Avonmouth for comparison with (sulphur dioxide)
Air Quality Objectives and Standards.
Blagden Packaging (2001)
Neil Murdoch, Environment Agency SW
Air quality modelling is used to estimate the steam plume visibility
model for a proposed stack at Avonmouth.
Blue Circle (2001)
Neil Murdoch, Environment Agency SW
This reports on the air quality modelling audit of Blue Circle's proposal
to burn whole car tyres in their cement kilns at Westbury.
Holsworthy Biogas (2002)
Neil Murdoch, Environment Agency SW
This reports on the air quality modelling audit for the power generation
facility, making use of animal waste, at Holsworthy.
Maybridge (2002)
Neil Murdoch, Environment Agency SW
This report is a screen assessment of atmospheric releases from the
Maybridge plc. site near Tintagel.
UCB Bridgwater
UCB SO2 Release Modelling (2001)
Neil Murdoch, Environment Agency SW
This is a preliminary assessment of Sulphur dioxide releases from
UCB Cellophane factory, Bridgwater. The impact on air quality is determined.
Modelling of Fixed Rate Emissions of SO2 from UCB, Bridgwater (2002)
This report assess the impact of emissions which do not vary in time
and compares predicted ground level concentrations with the 15 minute
SO2 standard
Modelling of Time Varying Emissions of SO2 from UCB, Bridgwater (2002)
This report assess the impact of emissions which are time varying
and compares predicted ground level concentrations with the 15 minute
SO2 standard
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