The Earth's surface (soil and plants), and the rock underneath interact, linked by rainwater flowing through the soil into the rock. The soil imparts a chemical signature to the water, sometimes bad leading to loss of water quality. This signature is mediated by movement through the rock, and then, when underground water re-emerges, in streams and rivers by bacterial activity. As such, how this outer layer of planet Earth functions is 'critical' to key needs of mankind - how much water we have available and its quality; how well the soil functions as a result of water draining through it. The study of how these layers interact is thus called 'critical zone' research. Our research programme uses such 'critical zone' research in an environment where the local residents face significant environmental challenges - in rural China, an area of rapid growth and where many live under the poverty line. This is a joint research programme between UK and China. We will focus on two of these challenges: water availability and quality, and how movement of water in the critical zone influences surface vegetation. Crucial to this research is that the underlying rock is mostly limestone. Limestone is easily dissolved and water can move very quickly through the subsurface. So soils may dry sooner (as the subsurface beneath is freely-draining) and there is limited water storage on the surface and underground. Limestone is widely distributed world-wide, but particularly in China and so study here is relevant to many world-wide. The people living in the catchment generally live-off-the-land. It provides their water and food - a phenomenon known as the ecosystem providing services. Where the slopes are not too steep, the land surface is heavily-cultivated. This in turn presents problems e.g., the water quality is poor, with dangerously high-level of nitrate (a chemical that is found in fertiliser); clearance of vegetation exposes rock, limiting how land may be used. Further challenging to local residents is that the climate is changing. How rain is delivered to the catchment has been changing such that water is not available as before. Thus there have also been water shortages, and this led to crop failure and so loss of food. Land use change is important in shaping these ecosystem services, but climate change may be one of the most significant threats the residents will face; science must help them prepare for facing these threats with successful outcomes. Our research will generate models of how the critical zone functions currently and from these we can then investigate how the critical zone functioning may adapt to different environmental drivers. There is a large body of scientific modelling outside this project that has identified how the climate may change. Thus, we can draw on this to run the models we will develop of the critical zone functioning, not only under land use change, but also under future climate scenarios. All this research will contribute to understanding where this catchment critical zone is most sensitive to future threats. However, it is important that this understanding reaches the people who need to use it. So the final activity we will undertake comes under the umbrella of 'knowledge exchange' - sharing our findings with those who need this research, and adjusting our understanding based on knowledge they too have. Thus our last, but not least, activity is working with those who live in the landscape and those who manage it, to help them identify how their activities can cause the least harm and offer the most protection to their ecosystem services. Our collaboration with Chinese colleagues is therefore crucial. We bring new skills to the project (e.g. new hydrological modelling skills) that they will benefit from. Additionally as catchment management practices will be quite different across UK-China, they will learn about other good practice to help improve their environment and remove residents from poverty

SWEEP brings together a unique blend of academics, businesses and policymakers to place 'natural capital' - those elements of nature producing value for people - at the heart of regional decision-making and business processes in the South West (SW). Focussing on the Heart of the South West and Cornwall and Isles of Scilly Local Enterprise Partnership (LEP) regions, SWEEP will radically transform the extent to which NERC science drives sustainable economic growth, improves policy, decision-making and resilience, delivers value for money and enhances health and wellbeing. The UK Government has placed sustainable use of natural capital at the centre of its 25 Year Environment Plan (25YEP). With 800km of spectacular coastline and over a quarter of land within National Parks/Areas of Outstanding Natural Beauty, the SW is rich in natural capital. It is particularly reliant on these natural assets and the ecosystem services deriving from them to power economic growth, attracting more domestic tourists and with higher employment in direct natural capital usage (e.g. agriculture, fisheries) than any other UK region. However, there is also more potential for natural capital-led economic growth; productivity is low, with Gross Value Added 20% below national average and the lowest mean incomes nationally. Heavy reliance on natural capital also brings economic vulnerability and challenges from increasing occurrences of storms, flooding, degradation and pollution that damage that capital and limit economic growth. SWEEP and its business and policy partners have co-designed a work programme utilising NERC-funded research to develop an integrated, cross-sectoral, 'whole system' approach to natural capital-led growth. The region's natural assets are inextricably linked, so traditional decision-making focussing on one sector at a time can result in unintended negative consequences for others. For example agricultural subsidies can lead to. contaminants from land bordering rivers lowering downstream water quality, affecting aquaculture, fisheries, tourism and health. SWEEP will address these problems, realising the benefits of integrated, whole system decision making through five interwoven 'Impact Themes', aiming to: 1) co-build tools to help business and government understand both the economic and environmental consequences of decisions; and 2) co-develop new business opportunities and natural capital markets giving both private and public sector organisations the means and incentive to improve nature's services, reducing their costs and risk exposure and improving their benefits. With partners we have developed an initial set of 'Impact Cases', each addressing one or more Impact Themes, which will commence at the outset for rapid delivery of impact. They include development of new tools for natural hazard prediction and evaluation of economic/social benefits of enhancing natural capital. Careful integration across these Cases will demonstrate how the SW's high dependence on its natural environment can provide unprecedented opportunities to deliver transformative economic benefits. The SWEEP consortium brings together a uniquely strong mix of environmental scientists, economists, social and health scientists. A team of 'Impact Fellows' will be embedded with partners to deliver the Impact Cases and scope new SWEEP activities. Partners will be integral to design, management and delivery, ensuring that all activities are aligned with user needs and fully integrated, maximising return on NERC's investment. Further value comes from alignment with the new 'Pioneers', which will be exemplars for the Government's 25YEP. Of only five 'Pioneers' nationally, two will be in the SW, providing the only integrated terrestrial-marine testbed for the 25 YEP. By working with the business and policy institutions involved in the Pioneers, SWEEP will act as a national flagship for environment-led regional growth.