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Current approaches to environmental protection and development on land, along rivers and coastal zones, and in marine environments are struggling to effectively promote sustainability. This is partly due to limited understanding of how ecosystems are linked, and partly due to fragmented governance and management arrangements in the continuum from source to sea that hinders cooperation and strategic overview across connected systems. Meanwhile, the key flows that link ecosystems are being altered by climate change and by an intensification of human activities, which are also expanding offshore where management regimes are typically weak or nonexistent. This paper presents a conceptual framework to guide the design of future initiatives aimed at supporting green and blue growth in source-to-sea systems. It includes a taxonomy of key flows, elements to guide analysis and planning and a common framework for elaborating a theory of change. Assembling a governance baseline and engaging stakeholders are critical elements in the approach. The conceptual framework builds on recent experiences of pro-sustainability action in source-to-sea systems around the world, and the paper applies the theory of change framework to selected case studies in order to develop further insights. [ABSTRACT FROM AUTHOR]

This paper seeks to complement ongoing discussions around water allocation by offering an analytic framework for examining the evolution of paradigms for water allocation in river basins. It traces this evolution from the hydraulic paradigm through to Integrated Water Resources Management (IWRM) and the current water security paradigm. Using a society-science-practice interaction perspective, the paper draws attention to the governance processes of water allocation that underlie these paradigms using examples from river basins in southern Africa. It is argued that the process of allocating water resources is often influenced by societal priorities and values that do not necessarily result in maintaining ecosystem health and integrity. The efficacy of water allocation depends on the extent to which implementation takes into account the socio-political dynamics associated with collective action involving multiple water users. While paradigm shifts provide windows of opportunity for strengthening legislation, the mere adoption of paradigms should not be taken as a panacea for addressing challenges associated with water allocation in river basins. This is especially relevant for several countries in southern Africa that are undertaking water reforms with the view of strengthening allocation of water resources at basin scale. [ABSTRACT FROM AUTHOR]