This proposal concerns the creation of an internationally leading Centre for doctoral training in sustainable civil engineering. The widest possible definition of sustainability is adopted, with the Centre covering the effective whole life design and performance of major civil engineering infrastructure. This includes the re-appraisal and re-use of existing infrastructure and the opportunities afforded by multiple-use. This sector is widely reported to face major problems recruiting the type, quality and number of people required. The Centre will address the key challenges of fit for purpose, economic viability, environmental impact, resilience, infrastructure inter-dependence, durability as well as the impacts of changes in population, urbanisation, available natural resources, technology and societal expectations. This requires a broad-based approach to research training, effectively integrated across the wide range of disciplines presently encompassed within the civil engineering profession. Very few academic institutions are capable of providing in-depth training across this range of subjects. However, the Civil and Environmental Engineering Department at Imperial College, recently (QS 2013) ranked number one in the world against its competitor departments, is uniquely placed within the UK to achieve exactly this. The Centre will recruit high quality, ambitious engineers. The doctoral training will combine intellectual challenge, technical content and rigor, with focused involvement in the practically important problems presently faced by the civil engineering profession. Advice and guidance from a high-level and broadly-based industrial advisory panel will be important in achieving the latter. Most importantly, the CDT will equip students with an appreciation of the wider context in which their research work is undertaken. The proposed programme is clearly designed to be PhD-PLUS; where the PLUS relates to a clear understanding of the breath of the problem within which their specific research sits, with a strong emphasis on sustainability. This latter component will include the industrial perspective, the societal need, the long term sustainability of the work and its immediate impact. The proposed CDT will make a difference by producing high quality civil engineers who understand global sustainability issues, in the widest possible context, and who have the skills and vision to eventually lead major infrastructure development projects or research programmes. Training will combine intensive taught training modules, group working around Grand Challenge projects in collaboration with industry and high quality research training. Project-based multi-disciplinary collaborative working will be at the core of the CDT training experience, modelling the way leading companies explore design options involving mixed disciplinary teams working together on ambitious projects. Working on a real-world problem, the students will have to interact extensively with others to understand the problem in detail, to develop holistic potential solutions, to assess these solutions and to identify the uncertainties and questions that can only be answered through further research. They will develop skills associated with coping with complexity, being able to make value-based decisions and being confident with interdisciplinary working. They will also be heavily involved in identifying and defining the research problem within the wider multi-faceted project and so will gain a much broader perspective of how specific research developing responsible innovation fits within a large civil engineering project. Overall, this approach is much more likely to develop the additional skills required by industry compared to conventional doctoral civil engineering training.

Turbidity currents are the volumetrically most import process for sediment transport on our planet. A single submarine flow can transport ten times the annual sediment flux from all of the world's rivers, and they form the largest sediment accumulations on Earth (submarine fans). These flows break strategically important seafloor cable networks that carry > 95% of global data traffic, including the internet and financial markets, and threaten expensive seabed infrastructure used to recover oil and gas. Ancient flows form many deepwater subsurface oil and gas reservoirs in locations worldwide. It is sobering to note quite how few direct measurements we have from submarine flows in action, which is a stark contrast to other major sediment transport processes such as rivers. Sediment concentration is the most fundamental parameter for documenting what turbidity currents are, and it has never been measured for flows that reach submarine fans. How then do we know what type of flow to model in flume tanks, or which assumptions to use to formulate numerical or analytical models? There is a compelling need to monitor flows directly if we are to make step changes in understanding. The flows evolve significantly, such that source to sink data is needed, and we need to monitor flows in different settings because their character can vary significantly. This project will coordinate and pump-prime international efforts to monitor turbidity currents in action. Work will be focussed around key 'test sites' that capture the main types of flows and triggers. The objective is to build up complete source-to-sink information at key sites, rather than producing more incomplete datasets in disparate locations. Test sites are chosen where flows are known to be active - occurring on annual or shorter time scale, where previous work provides a basis for future projects, and where there is access to suitable infrastructure (e.g. vessels). The initial test sites include turbidity current systems fed by rivers, where the river enters marine or freshwater, and where plunging ('hyperpycnal') river floods are common or absent. They also include locations that produce powerful flows that reach the deep ocean and build submarine fans. The project is novel because there has been no comparable network established for monitoring turbidity currents Numerical and laboratory modelling will also be needed to understand the significance of the field observations, and our aim is also to engage modellers in the design and analysis of monitoring datasets. This work will also help to test the validity of various types of model. We will collect sediment cores and seismic data to study the longer term evolution of systems, and the more infrequent types of flow. Understanding how deposits are linked to flows is important for outcrop and subsurface oil and gas reservoir geologists. This proposal is timely because of recent efforts to develop novel technology for monitoring flows that hold great promise. This suite of new technology is needed because turbidity currents can be extremely powerful (up to 20 m/s) and destroy sensors placed on traditional moorings on the seafloor. This includes new sensors, new ways of placing those sensors above active flows or in near-bed layers, and new ways of recovering data via autonomous gliders. Key preliminary data are lacking in some test sites, such as detailed bathymetric base-maps or seismic datasets. Our final objective is to fill in key gaps in 'site-survey' data to allow larger-scale monitoring projects to be submitted in the future. This project will add considerable value to an existing NERC Grant to monitor flows in Monterey Canyon in 2014-2017, and a NERC Industry Fellowship hosted by submarine cable operators. Talling is PI for two NERC Standard Grants, a NERC Industry Fellowship and NERC Research Programme Consortium award. He is also part of a NERC Centre, and thus fulfils all four criteria for the scheme.

Turbidity currents are the volumetrically most import process for sediment transport on our planet. A single submarine flow can transport ten times the annual sediment flux from all of the world's rivers, and they form the largest sediment accumulations on Earth (submarine fans). These flows break strategically important seafloor cable networks that carry > 95% of global data traffic, including the internet and financial markets, and threaten expensive seabed infrastructure used to recover oil and gas. Ancient flows form many deepwater subsurface oil and gas reservoirs in locations worldwide. It is sobering to note quite how few direct measurements we have from submarine flows in action, which is a stark contrast to other major sediment transport processes such as rivers. Sediment concentration is the most fundamental parameter for documenting what turbidity currents are, and it has never been measured for flows that reach submarine fans. How then do we know what type of flow to model in flume tanks, or which assumptions to use to formulate numerical or analytical models? There is a compelling need to monitor flows directly if we are to make step changes in understanding. The flows evolve significantly, such that source to sink data is needed, and we need to monitor flows in different settings because their character can vary significantly. This project will coordinate and pump-prime international efforts to monitor turbidity currents in action. Work will be focussed around key 'test sites' that capture the main types of flows and triggers. The objective is to build up complete source-to-sink information at key sites, rather than producing more incomplete datasets in disparate locations. Test sites are chosen where flows are known to be active - occurring on annual or shorter time scale, where previous work provides a basis for future projects, and where there is access to suitable infrastructure (e.g. vessels). The initial test sites include turbidity current systems fed by rivers, where the river enters marine or freshwater, and where plunging ('hyperpycnal') river floods are common or absent. They also include locations that produce powerful flows that reach the deep ocean and build submarine fans. The project is novel because there has been no comparable network established for monitoring turbidity currents Numerical and laboratory modelling will also be needed to understand the significance of the field observations, and our aim is also to engage modellers in the design and analysis of monitoring datasets. This work will also help to test the validity of various types of model. We will collect sediment cores and seismic data to study the longer term evolution of systems, and the more infrequent types of flow. Understanding how deposits are linked to flows is important for outcrop and subsurface oil and gas reservoir geologists. This proposal is timely because of recent efforts to develop novel technology for monitoring flows that hold great promise. This suite of new technology is needed because turbidity currents can be extremely powerful (up to 20 m/s) and destroy sensors placed on traditional moorings on the seafloor. This includes new sensors, new ways of placing those sensors above active flows or in near-bed layers, and new ways of recovering data via autonomous gliders. Key preliminary data are lacking in some test sites, such as detailed bathymetric base-maps or seismic datasets. Our final objective is to fill in key gaps in 'site-survey' data to allow larger-scale monitoring projects to be submitted in the future. This project will add considerable value to an existing NERC Grant to monitor flows in Monterey Canyon in 2014-2017, and a NERC Industry Fellowship hosted by submarine cable operators. Talling is PI for two NERC Standard Grants, a NERC Industry Fellowship and NERC Research Programme Consortium award. He is also part of a NERC Centre, and thus fulfils all four criteria for the scheme.

There has never been a more exciting time to be at the interface of biological engineering and petroleum geosciences. Recent discoveries in geomicrobiology and methodological breakthroughs in DNA sequencing place us on the brink of an unprecedented understanding of the role of microorganisms in globally significant processes in subsurface petroleum reservoirs. Qualified estimates reveal that the vast majority of microorganisms on Earth inhabit the subsurface. Most newly discovered taxa in this 'deep biosphere' have no representatives in laboratory cultures, thus knowledge about their role in economically relevant biogeochemical cycles is unknown. Fossil fuel reservoirs are microbial habitats of great scientific interest and even greater societal importance. Microbes native to subsurface petroleum reservoirs can cause significant damage and economic loss. However, understanding and harnessing this 'petroleum microbiome' has great potential for engineering interventions for more sustainable petroleum production and novel exploration strategies.The next generation of engineers faces the unavoidable challenge of reducing global greenhouse gas emissions. The oil and gas industry is at the epicentre of this challenge. Currently fossil fuels account for greater than 80% of global primary energy supply, yet even under optimistic projections of rapid innovation and modest population growth fossil fuels will still supply 70% of our energy in 2030 (International Energy Agency, 2010). It is clear that the transition towards more sustainable energy will require several decades, that fossil fuels will continue to be essential, and that innovation is needed in all areas of the energy sector. It is critical therefore to develop new engineering interventions and novel technologies focusing directly on the oil indsutry so that existing resources are exploited as responsibly as possible.It has long been recognized that microorganisms are important constituents of petroleum reservoirs and oil production systems, with the presence of sulfate-reducing bacteria (SRB) being reported almost a century ago (Bastin, 1926, Science 63:21). SRB are well known in the oil industry because they cause reservoir souring - the production of toxic hydrogen sulfide (H2S). Souring costs the oil industry billions of pounds annually due to production problems related to H2S (e.g., corrosion) and the lower value of high-sulfur petroleum. Nitrate-reducing bacteria (NRB) can be stimulated to control souring in an environmentally friendly way, and while nitrate injection is a strategy beginning to be practised offshore, it remains poorly understood. The first major objective of DEEPBIOENGINEERING is to develop a new understanding of souring and nitrate-driven souring control by applying a combination of geochemistry, microbiology and high throughput nucleic acid sequencing to reservoir production waters and experimental cultures inoculated with them. This research will deliver an unprecedented understanding of the petroleum microbiome, which will underpin prediction-based bioengineering interventions for souring control.The second major objective of DEEPBIOENGINEERING is to exploit the knowledge of the deep petroleum microbiome to track the distribution of formerly indigenous reservoir bacteria. This will lead to a totally new tool for offshore oil and gas exploration. This idea is based on the observation of oil reservoir-like bacteria (thermophilic SRB) in cold ocean sediments (Hubert et al 2009, Science 325:1541) and the hypothesis that petroleum fluids leaking from reservoirs at natural seafloor hydrocarbon seeps is a mechanism for microbe dispersal that can be quantitatively measured. This will lead to predictive models and concepts that will be use bioindicators to map the seafloor and predict or locate seabed hydrocarbon seeps. This environmentally friendly tool will assist offshore exploration for needed petroleum energy resources.

Methane is a greenhouse gas with 86 times the global warming potential of carbon dioxide over a 20-year period - the timescale in which global action to reduce carbon emissions and limit catastrophic climate change is needed. Atmospheric methane concentrations have increased by 0.5% per year since 2010, yet to achieve the Paris Climate target limiting global warming to 1.5 degrees Celsius it needs to decrease by 0.9% per year between 2010 and 2050. Roughly half the methane currently in the atmosphere comes from human activity, so addressing human-driven methane emissions is crucial to achieving climate targets. This fellowship will allow me to build a team to help address the global rise in methane emissions. This will be achieved via three work packages (WPs) that deliver technical solutions to key challenges standing in the way of a reduction in human-driven methane emissions. These technical solutions will be developed and applied in urban waterways (city rivers and canals) because these systems can act as conduits for human-driven methane emissions to the atmosphere. Urban waterways can receive a wide range of methane inputs, such as leaky gas and wastewater pipes, and will come under increasing human pressure with more than 5 billion people predicted to live in cities by 2030. WP1. How do we accurately measure methane emissions? Methane emissions can vary substantially over short spatial (meters) and temporal (hours) scales. The fellowship will deliver instrumentation that can measure methane emissions at spatial and temporal resolutions far surpassing current capabilities, and use it to quantify the contribution of urban waterways to city-scale methane inventories across globally representative locations (UK, Europe, USA, China, Bangladesh). WP2. Where do methane emissions originate? Methane emissions can be driven directly by human activity, such as leaky pipes, or indirectly by increasing the production of methane in waterways. The techniques used in this fellowship will distinguish natural from human-driven methane by measuring methane/ethane ratios and methane stable (C-13) isotopes at the same high resolutions as in WP1. This will be coupled with targeted methane radio- (C-14) and stable (H-2) isotopes, and geochemical and microbial characterisation of urban waterways. Methane emissions and origin will be mapped out for entire urban waterway networks to determine the key controls of methane release to the atmosphere. WP3. How do we reduce methane emissions? The mapping of controls on methane release, coupled to detailed microbial characterisation through in-situ and lab incubations, will be used to deliver techniques to a) detect methane leaks, even ones hidden underground, and b) prevent the emission of human-driven methane to the atmosphere by developing bioremediation strategies. For example, how do urban waterway microbes respond to methane leaks, and can we utilise these microbes to rapidly oxidise leaking methane before it reaches the atmosphere? With a wide range of potential human-driven methane sources, urban waterways provide a strong testbed for the proposed techniques. These techniques will be delivered as a toolbox for research, industry and policy end-users. The toolbox will be developed in collaboration with project partners such as Shell and the UK Environment Agency via a research and industry-led steering committee (see letters of support). This fellowship provides the flexibility, training and time required to deliver a user-focused toolbox containing: 1) instrumentation to capture the spatial and temporal variability of methane emissions 2) a freely available reference database of methane isotopes and associated geochemical and microbial signatures to identify methane origins 3) tangible solutions to detect and reduce human-driven methane emissions to the atmosphere, developed in collaboration with industry and policy focused partners.