Numerical modelling has been undertaken to help improve understanding of a deep geothermal system... more Numerical modelling has been undertaken to help improve understanding of a deep geothermal system being considered for development in the vicinity of Eastgate (Weardale, County Durham, UK). A parsimonious numerical modelling approach is used, which allows the possibility to develop a workable formal framework, rigorously testing evolving concepts against data as they become available. The approach used and results presented in this study are valuable as a contribution to a wider understanding of deep geothermal systems. This modelling approach is novel in that it utilises the mass transport code MT3DMS as a surrogate representation for heat transport in mid-enthalpy geothermal systems. A three-dimensional heat transport model was built, based on a relatively simple conceptual model. Results of simulation runs of a geothermal production scenario have positive implications for a working geothermal system at Eastgate. The Eastgate Geothermal Field has significant exploitation potential for combined heat and power purposes; it is anticipated that this site could support several tens of megawatts of heat production for direct use and many megawatts of electrical power using a binary power plant.
Physically based spatially distributed (PBSD) river basin models have been available for over 10 ... more Physically based spatially distributed (PBSD) river basin models have been available for over 10 years. One of their strengths lies in the way the surface and subsurface are represented as coupled parts of a whole, giving ground-water flows that are controlled by such factors as realistic surface saturation and infiltration, and surface conditions that are controlled by realistic groundwater levels,
Modelling the impact of afforestation or deforestation on water resources is complex due to facto... more Modelling the impact of afforestation or deforestation on water resources is complex due to factors such as the microclimate, the soils, the underlying geology, the presence of macropores, the species, their age and density. Parameters used in modelling the different processes are traditionally determined individually from laborious measurements. In this study the only input data required are time series precipitation
Proceedings of the ICE - Engineering Sustainability, 2009
The UK biological and engineering impacts of climate change on slopes (Bionics) project was funde... more The UK biological and engineering impacts of climate change on slopes (Bionics) project was funded to bring together key stakeholders and academics to research advanced procedures for maintaining serviceability and safety of strategic embankments and cuttings in addition to advancing the science base. This paper summarises some of the evidence that suggests climate change will have an effect on the behaviour of infrastructure slopes and their management, and provides an overview of future climate scenarios for the UK. It also ...
ABSTRACT A rapid assessment method for evaluating the impacts of groundwater abstraction on river... more ABSTRACT A rapid assessment method for evaluating the impacts of groundwater abstraction on river flow depletion has been developed and tested. A hybrid approach was taken, in which a neural network model was used to mimic the results from numerical simulations of interactions between groundwater and rivers using the SHETRAN integrated catchment modelling system. The use of a numerical model ensures self-consistent relationships between input and output data which have a physical basis and are smooth and free of noise. The model simulations required large number of input parameters and several types of time series and spatial output data representing river flow depletions and groundwater drawdown. An orthogonal array technique was used to select parameter values from the multi-dimensional parameter space, providing an efficient design for the neural network training as the datasets are reasonably independent. The efficiency of the neural network model was also improved by a data reduction approach involving fitting curves to the outputs from the numerical model without significant loss of information. It was found that the use of these techniques were essential to develop a feasible method of providing rapid access to the results of detailed process-based simulations using neural networks.
ABSTRACT The Système Hydrologique Europeén (SHE) modelling system and physically-based distribute... more ABSTRACT The Système Hydrologique Europeén (SHE) modelling system and physically-based distributed modelling (PBDM) were discussed in Refsgaard et al.'s Système Hydrologique Europeén (SHE): review and perspectives after 30 years development in distributed physically-based hydrological modelling (Hydrology Research 41, pp. 355–377). The opportunity is taken here to correct some oversights and potentially misleading perspectives in that paper and mount a more robust defence of PBDM.
Numerical modelling has been undertaken to help improve understanding of a deep geothermal system... more Numerical modelling has been undertaken to help improve understanding of a deep geothermal system being considered for development in the vicinity of Eastgate (Weardale, County Durham, UK). A parsimonious numerical modelling approach is used, which allows the possibility to develop a workable formal framework, rigorously testing evolving concepts against data as they become available. The approach used and results presented in this study are valuable as a contribution to a wider understanding of deep geothermal systems. This modelling approach is novel in that it utilises the mass transport code MT3DMS as a surrogate representation for heat transport in mid-enthalpy geothermal systems. A three-dimensional heat transport model was built, based on a relatively simple conceptual model. Results of simulation runs of a geothermal production scenario have positive implications for a working geothermal system at Eastgate. The Eastgate Geothermal Field has significant exploitation potential for combined heat and power purposes; it is anticipated that this site could support several tens of megawatts of heat production for direct use and many megawatts of electrical power using a binary power plant.
Physically based spatially distributed (PBSD) river basin models have been available for over 10 ... more Physically based spatially distributed (PBSD) river basin models have been available for over 10 years. One of their strengths lies in the way the surface and subsurface are represented as coupled parts of a whole, giving ground-water flows that are controlled by such factors as realistic surface saturation and infiltration, and surface conditions that are controlled by realistic groundwater levels,
Modelling the impact of afforestation or deforestation on water resources is complex due to facto... more Modelling the impact of afforestation or deforestation on water resources is complex due to factors such as the microclimate, the soils, the underlying geology, the presence of macropores, the species, their age and density. Parameters used in modelling the different processes are traditionally determined individually from laborious measurements. In this study the only input data required are time series precipitation
Proceedings of the ICE - Engineering Sustainability, 2009
The UK biological and engineering impacts of climate change on slopes (Bionics) project was funde... more The UK biological and engineering impacts of climate change on slopes (Bionics) project was funded to bring together key stakeholders and academics to research advanced procedures for maintaining serviceability and safety of strategic embankments and cuttings in addition to advancing the science base. This paper summarises some of the evidence that suggests climate change will have an effect on the behaviour of infrastructure slopes and their management, and provides an overview of future climate scenarios for the UK. It also ...
ABSTRACT A rapid assessment method for evaluating the impacts of groundwater abstraction on river... more ABSTRACT A rapid assessment method for evaluating the impacts of groundwater abstraction on river flow depletion has been developed and tested. A hybrid approach was taken, in which a neural network model was used to mimic the results from numerical simulations of interactions between groundwater and rivers using the SHETRAN integrated catchment modelling system. The use of a numerical model ensures self-consistent relationships between input and output data which have a physical basis and are smooth and free of noise. The model simulations required large number of input parameters and several types of time series and spatial output data representing river flow depletions and groundwater drawdown. An orthogonal array technique was used to select parameter values from the multi-dimensional parameter space, providing an efficient design for the neural network training as the datasets are reasonably independent. The efficiency of the neural network model was also improved by a data reduction approach involving fitting curves to the outputs from the numerical model without significant loss of information. It was found that the use of these techniques were essential to develop a feasible method of providing rapid access to the results of detailed process-based simulations using neural networks.
ABSTRACT The Système Hydrologique Europeén (SHE) modelling system and physically-based distribute... more ABSTRACT The Système Hydrologique Europeén (SHE) modelling system and physically-based distributed modelling (PBDM) were discussed in Refsgaard et al.'s Système Hydrologique Europeén (SHE): review and perspectives after 30 years development in distributed physically-based hydrological modelling (Hydrology Research 41, pp. 355–377). The opportunity is taken here to correct some oversights and potentially misleading perspectives in that paper and mount a more robust defence of PBDM.
Uploads
Papers by Geoff Parkin
considered for development in the vicinity of Eastgate (Weardale, County Durham, UK). A parsimonious numerical
modelling approach is used, which allows the possibility to develop a workable formal framework, rigorously testing
evolving concepts against data as they become available. The approach used and results presented in this study are
valuable as a contribution to a wider understanding of deep geothermal systems. This modelling approach is novel in
that it utilises the mass transport code MT3DMS as a surrogate representation for heat transport in mid-enthalpy
geothermal systems. A three-dimensional heat transport model was built, based on a relatively simple conceptual
model. Results of simulation runs of a geothermal production scenario have positive implications for a working
geothermal system at Eastgate. The Eastgate Geothermal Field has significant exploitation potential for combined
heat and power purposes; it is anticipated that this site could support several tens of megawatts of heat production
for direct use and many megawatts of electrical power using a binary power plant.
considered for development in the vicinity of Eastgate (Weardale, County Durham, UK). A parsimonious numerical
modelling approach is used, which allows the possibility to develop a workable formal framework, rigorously testing
evolving concepts against data as they become available. The approach used and results presented in this study are
valuable as a contribution to a wider understanding of deep geothermal systems. This modelling approach is novel in
that it utilises the mass transport code MT3DMS as a surrogate representation for heat transport in mid-enthalpy
geothermal systems. A three-dimensional heat transport model was built, based on a relatively simple conceptual
model. Results of simulation runs of a geothermal production scenario have positive implications for a working
geothermal system at Eastgate. The Eastgate Geothermal Field has significant exploitation potential for combined
heat and power purposes; it is anticipated that this site could support several tens of megawatts of heat production
for direct use and many megawatts of electrical power using a binary power plant.