Groundwater resources in the coastal zone of EA are at risk. Increased demand, linked to rapid population growth in the coastal margins, has led to unsustainable and ill-planned well drilling and abstraction. Sea water intrusion into formerly freshwater aquifers frequently occurs as recharge from rainfall is insufficient to support the rate at which water is extracted. Wells supplying domestic, industrial and agricultural needs have, in many areas, become too saline for use. Climate change is expected to exacerbate this problem. Rising sea levels in the Indian Ocean region are projected to cause inundation of saltwater along the coastal zone, which is dominated by highly-permeable rock, while altered precipitation patterns and temperature change will affect the amount of water replenishing the aquifer through infiltration and recharge. Local communities across the region are already reporting changing tidal and rainfall patterns. The multiplicity of hydrological and demographic driving factors makes this a very challenging issue for management. At present the state of coastal aquifers in the EA region is not well constrained and past practices which may have exacerbated the problem have not been clearly identified. This project will bring together teams from Kenya, Tanzania and the Comoros Islands to address this knowledge gap; collaborating and working towards achieving water security in their respective areas. An integrative approach, combining the expertise of hydrogeologists, hydrologists and social scientists, will target selected sites along the coastal zone in each country. Hydrogeologic observatories will be developed where focussed research will identify the current condition of the coastal aquifers and identify future threats based on projected demographic and climate change scenarios. Water supply and monitoring needs will be identified through consultations with end-users and local authorities and optimum strategies for addressing these sought. An initial step will be to survey and bring together all existing data on well installations, abstraction, groundwater gradients and the salinity of existing wells at each pilot site. Understanding where wells are located, how deep they are, how much water is abstracted, what the flow directions are and what the salinity is, provides an overview of the state of the aquifer. Local data on hydraulic properties, such as the permeability, porosity, and storativity of the aquifer will be investigated and synthesised. Targeted electrical geophysical surveys, which provide relevant spatial information on both the aquifer structure and the saltwater distribution, will be undertaken. Similarly data is needed on the hydrological drivers in the system; to understand how much of annual rainfall infiltrates to replenish groundwater reserves (compared to the amount abstracted for human use) and how this might be impacted by changes in rainfall intensity or frequency. Land use and land use change is also important; controlling the proportion of incident rainfall which reaches the soil and subsequently groundwater. Recharge modelling will be an important tool for investigating different scenarios for climate and land use change and evaluating groundwater vulnerability. The social and political aspects of water use and development will be incorporated to assess the compatibility between the evolution of the availability of coastal freshwater resources and those of society and water politics. Researchers will engage with local community and stakeholder groups in each area and work together towards understanding the issues most affecting the communities with regards accessibility to water supply. A two-way exchange of knowledge between researchers and community members is essential in working towards feasible solutions to existing problems and ensuring preparedness for the changes in demographics and environment in the future.

Where: SDGs (Sustainable Development Goals), U (university), CoE (Centre of Excellence), CSES(Complex Social-Ecological System) & landscape/catchment/watershed: synonymous. The "Water for African SDGs" project will establish & develop the ARUA Water CoE as an effective, high-performance, hub & network of 8 African Universities' researchers & post graduate students. CoE research development will be based on understanding humans living on earth as the intricate coupling of society with the natural world - CSESs. We will forefront community engagement & knowledge sharing for sustainability. We will use research to catalyse change towards social and ecological justice and sustainability, paying attention to African community water and sanitation needs. The Water CoE has developed a systemic image of the SDGs as a planning, practice & evaluation tool. The image has SDG 6, Clean water & sanitation, at the centre, linking two primary water cycles: i) Water in a Catchment (rainfall, run-off, ground water recharge, evapo-transpiration, evaporation); & ii) Water Services - supply & sanitation (raw water from the natural resource, often in dams, pipes & pumps to water treatment works, treated potable water to households, waste water to treatment works & discharge into the natural resource). Several nodes place their water research in a climate change context (SDG 13), and acknowledge that water is integral to SDG 15 (life on land), 11 (sustainable cities & communities), & 12 (responsible consumption & production), Effective water resource management, supply and sanitation requires good water governance by strong institutions (SDG 16). The Water CoE itself embodies SDGs 17 (partnerships to reach goals), 4 (quality education) & 5 (gender equality). Each CoE node has strengths in different parts of these cycles. This project brings together strengths, so nodes can flexibly link & respond innovatively to research funding calls, & effectively apply research. Capacity-building, exchanges and mentorship will mainly be addressed through the development & delivery of a 3-day course by each node, to 14 participants from 3-5 other nodes. Participants will be doctoral students, early-, mid-career & established researchers. Nodes will host a course on their primary strength, nodes will co-develop courses out of secondary strengths. In Year 1, the hub (Rhodes U), will deliver a core foundation course to 3 delegates from each node (total 21), on Adaptive Integrated Water Resources Management (A-IWRM), including the CSES concept, transdisciplinarity and water governance. Node courses will run over Years 1 & 2, and an early identification of course areas is: Landscape restoration & catchment water use (Addis Ababa U, Ethiopia), hydrology, geohydrology & hydraulic regimes for IWRM (U Dar es Salaam, Tanzania), optimising benefit from dams (Cheikh Anta Dio U, Senegal), biodiversity, natural resource management, water-energy-food nexus (U Rwanda), urban water pollution (U Lagos, Nigeria), urban water quality design (U Cape Town, South Africa), & water in future cities (Makarere U, Uganda). Course days will include time to work on research proposals. In Year 3, activities will focus on grant applications and a Water CoE delegation attending a relevant international conference to present the outcomes of the whole project. Over the 3-year period, each node will have one opportunity to invite/visit an international specialist, & by the end of year 3 at least 3 collaborative research projects will be running, each progressing an SDG challenge-area. Spin-off companies in water & sanitation could be emerging, and each node will have community-based water and/or sanitation impact successes. At least 24 early career researchers and 24 doctoral students will be mentored through the CoE. We will demonstrate the clear emergence of an African water research cohort, addressing water-related SDGs, with positive outcomes and impact.

Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.

Ten percent of the world's population depend on the ocean for a readily accessible source of protein and employment, with the majority (95%) living in developing countries. Poor coastal communities are at the frontier for climate change impacts, compounded by population growth and food demand, but are among the least resilient to the challenges of the future. SOLSTICE-WIO will focus on coastal communities in nine developing countries and island states in eastern Africa, interlinked culturally and ecologically and collectively known as the Western Indian Ocean (WIO) region. All nine (South Africa, Mauritius, Seychelles, Kenya, Tanzania, Mozambique, Somalia, Madagascar, Comoros) are on the list of Official Development Aid recipients, with five identified as Least Developed Countries. In the WIO over 100 million people live within 100 km of the ocean, with a significant proportion employed in local fisheries. This leaves the region highly dependent on the ocean for economic stability, food security, and social cohesion. These coastal communities have limited adaptive capacity to cope with dramatic reductions in fish stocks caused by overfishing, habitat destruction, and increasing environmental pressures - all aggravated by climate change. The decline of WIO fisheries has had profound socio-political ramifications, from the rise of piracy to general political instability. A clear example of the devastating effect of a fish stock reduction is the collapse of the Chokka Squid fishery in South Africa. SOLSTICE-WIO will use this as a case study to demonstrate the strengths of a holistic approach to human-ecosystem-fisheries research and the potential solutions this can offer. The squid fishery was the 4th most valuable fishery in South Africa, bringing foreign currency into one of the poorest provinces. It was directly employing 5000 fishermen with 30,000 dependents. The 2013 crash had a devastating effect on the Eastern Cape, yet the underlying reasons are unknown: local fishermen believe the collapse was caused by environmental change. Until the mechanisms behind the collapse are understood, there is little potential for aiding recovery or guiding adaptation. SOLSTICE-WIO will provide this urgently needed understanding to help inform the fishery and Government as to the fate of the local ecosystem, whether it will recover, and whether the crash could have been predicted or prevented. How will SOLSTICE achieve this? The key to stability of living marine resources lies in an ecosystem approach to fisheries (EAF), which sees human-natural systems as a whole, integrated entity rather than separately considering individual target species. Simply put: you cannot manage something you don't understand, nor can you adapt to change through management improvements unless you can describe, measure and understand the changes. The core strength of SOLSTICE-WIO lies in its integral approach to food security, drawing on UK expertise in physical oceanography, marine ecology, autonomous observations, environmental economics and the human dimension,and WIO expertise in fisheries, the marine economy and regional policy development. SOLSTICE will provide the region with the state-of-the-art technology to deliver cost-effective marine research and provide the information needed to achieve maximum potential from the region's living marine resources. In the UK marine robotics, ocean models and novel data products from satellite observations have developed rapidly in the last decade, and now underpin Blue Economies and Ocean Governance in Europe. These technologies are highly agile and ready to be applied in the developing world as cost-effective ways to maximise understanding and sustainable exploitation of living marine resources. Such "technology leapfrogging" can overcome the severe lack of research ships in the WIO and save decades of effort in developing predictive modelling systems from scratch.

East Africa (EA) has one of the world's fastest growing populations, with maxima around water-bodies and rapid urbanisation. Climate change is adding to existing problems increasing vulnerability of the poorest. HyCRISTAL is driven by EA priorities. EA communities rely on rainfall for food via agriculture. EA's inland lakes are rain-fed and provide water, power and fisheries. For EA's growing cities, climate impacts on water resources will affect water supply & treatment. HyCRISTAL will therefore operate in both urban & rural contexts. Change in water availability will be critical for climate-change impacts in EA, but projections are highly uncertain for rain, lakes, rivers and groundwater, and for extremes. EA "Long-Rains" are observed to be decreasing; while models tend to predict an increase (the "EA Climate paradox") although predictions are not consistent. This uncertainty provides a fundamental limit on the utility of climate information to inform policy. HyCRISTAL will therefore make best use of current projections to quantify uncertainty in user-relevant quantities and provide ground-breaking research to understand and reduce the uncertainty that currently limits decision making. HyCRISTAL will work with users to deliver world-leading climate research quantifying uncertainty from natural variability, uncertainty from climate forcings including those previously unassessed, and uncertainty in response to these forcings; including uncertainties from key processes such as convection and land-atmopshere coupling that are misrepresented in global models. Research will deliver new understanding of the mechanisms that drive the uncertainty in projections. HyCRISTAL will use this information to understand trends, when climate-change signals will emerge and provide a process-based expert judgement on projections. Working with policy makers, inter-disciplinary research (hydrology, economics, engineering, social science, ecology and decision-making) will quantify risks for rural & urban livelihoods, quantify climate impacts and provide the necessary tools to use climate information for decision making. HyCRISTAL will work with partners to co-produce research for decision-making on a 5-40 year timescale, demonstrated in 2 main pilots for urban water and policies to enable adaptive climate-smart rural livelihoods. These cover two of three "areas of need" from the African Ministerial Council on Environment's Comprehensive Framework of African Climate Change Programmes. HyCRISTAL has already engaged 12 partners from across EA. HyCRISTAL's Advisory Board will provide a mechanism for further growing stakeholder engagement. HyCRISTAL will work with the FCFA global & regional projects and CCKE, sharing methods, tools, user needs, expertise & communication. Uniquely, HyCRISTAL will capitalise on the new LVB-HyNEWS, an African-led consortium, governed by the East African Community, the Lake Victoria Basin Commission and National Meteorological and Hydrological agencies, with the African Ministerial Conference on Meteorology as an observer. HyCRISTAL will build EA capacity directly via collaboration (11 of 25 HyCRISTAL Co-Is are African, with 9 full-time in Africa), including data collection and via targeted workshops and teaching. HyCRISTAL will deliver evidence of impact, with new and deep climate science insights that will far outlast its duration. It will support decisions for climate-resilient infrastructure and livelihoods through application of new understanding in its pilots, with common methodological and infrastructure lessons to promote policy and enable transformational change for impact-at-scale. Using a combination of user-led and science-based management tools, HyCRISTAL will ensure the latest physical science, engineering and social-science yield maximum impacts. HyCRISTAL will deliver outstanding outputs across FCFA's aims; synergies with LVB-HyNEWS will add to these and ensure longevity beyond HyCRISTAL.