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Transboundary freshwater systems create inevitable linkages and interdependencies between countries. The use of shared water resources by one country will, in most cases, impact other countries sharing the same system. At the same time, coordination among countries in the development of transboundary basins can yield greater benefits than would be available to individual countries pursuing individual development. UN Sustainable Development Goal 6 Target 5 recognizes this potential, calling on the world community to implement integrated water resources management at all levels, 'including through transboundary cooperation as appropriate'. With a growing number of basins in which water use and demand permanently or temporarily exceeds the amount of renewable water available, and uncertainty from climate change, SDG Target 6.5 becomes increasingly relevant to development interventions designed to secure availability of supplies and create resilience. This is a companion document to the study "Promoting Development in Shared River Basins: Tools for Enhancing Transboundary Basin Management," which aims to contribute to relevant knowledge for achieving SDG Target 6.5. It presents six case studies from international experience on coordinated management in transboundary basins: Kura-Araks Basin; Columbia Basin; Chu and Talas Basins; Vuoksi Basin; Douro Basin; and Rhone Basin. The case studies demonstrate real-world application of selecting appropriate tools for individual transboundary situations along a three-stage process of coordinated basin development, which is detailed in the main study.

Energy --- Environment --- Hydro Power --- Hydrology --- River Basin Management --- Transboundary Water Management --- Water Resources --- Water Resources Management

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The Ganges Basin in South Asia is home to some of the world's poorest and most vulnerable communities. Impacted by catastrophic annual floods, the region is recognized as highly disaster prone, causing widespread human suffering and economic losses. In recognition of these challenges, many groups are actively and cooperatively engaged in reducing South Asia's vulnerability to flooding. As a contribution to these efforts, the World Bank recently commissioned specialist teams to assess and map flood risk across the Ganges River basin and to design and evaluate flood forecasting tools for the greater Ganges-Brahmaputra-Meghna basin. Flood Risk Assessment and Forecasting for the Ganges-Brahmaputra-Meghna River Basins summarizes the technical findings, includes highlights of the work, and links to the full technical reports and new interactive online resources. The report provides, for the first time, a numbers-based view of the impacts of floods of different severities across the Ganges basin, helping identify priority areas for addressing flood risks (for example, relocating levees, improving flood warning systems, and boosting overall economic resilience). This report on the flood forecasting system provides probability-based flood forecasts for more than 85 Ganges-Brahmaputra-Meghna basin locations along with near-real-time data maps of rainfall (predicted and actual) and river levels.

Environment and Natural Resource Management --- River Basin Management --- Water Resource Management --- Water Resources

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This UFCOP Knowledge Note outlines key principles for flood risk management in river basins, that can be adapted for use by policymakers and project managers alike. It draws on a wide range of best practice case studies globally, where flood risk at the river basin scale has been well managed.

Environment --- Flood Control --- Hazard Risk Management --- Natural Disasters --- River Basin Management --- Urban Development --- Water Resources

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This research focuses on incorporating a representation of water supply and infrastructure costs into an energy systems model (SATIM-W) to better reflect the interdependent nature of the energy-water nexus in South Africa and the water supply challenges facing the energy system. The research methodology developed embeds the various water supply options in a least cost optimization energy planning tool, so that the cost of water is captured. A key feature of the developed SATIM-W model is that it regionalizes power generaation, refining, and energy resource supply, thereby introducing a spatial dimension to the water demands of the energy sector. It also contains a regionalized structure of the basins and delivery infrastructure that would be required to supply the energy sector and assesses the impact of meeting those needs on the cost of supplying water. The results of this investigation demonstrate the process and type of tools that can be employed to examine the energy-water nexus in a national level planning context, and the insights that can be gained from water-smart energy planning. A number of relevant policy scenarios in South Africa were explored, and the results show that specific energy sector policies can have significant implication for both new investment in water supply infrastructure and in some cases can lead to stranded energy and water investments, reinforcing the importance of planning these sectors through a nexus approach. This case study is the first time the cost of water supply has been assessed in a sector wide energy supply expansion plan. By documenting the methodology, the authors aim to help energy sector planners and modelers properly incorporate water constraints in their work.

Electric Power --- Energy --- Energy and Environment --- Energy Consumption --- Environment --- River Basin Management --- Water Resources --- Water Resources Management

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The World Bank supported West Bengal Accelerated Development of Minor Irrigation Project assumes a centre stage position in the current context of bringing water to every farm (Har Khet ko Pani) under the recently launched Pradhan Mantri Krishi Sinchayee Yojana (PMSKY). With an objective to "enhance agricultural production of small and marginal farmers of the project area in West Bengal through development of minor irrigation infrastructure and agriculture support system", the Project was launched in 2012, partnering the Department of Water Resources Investigation and Development, Government of West Bengal. To achieve its outcomes, the Project focuses on strengthening community-based organizations, especially water users' association with a strong focus on gender aspects, irrigation systems development and improvement, agriculture, horticulture and fisheries development.

Agricultural Irrigation and Drainage --- Agriculture --- Hydrology --- Irrigation --- River Basin Management --- Water Resource Management --- Water Resources --- Watershed Management