"Regional water security around the world is at risk from climatic and non-climatic challenges, including extreme weather events, rapid population growth and urbanisation, economic growth and rising income levels, ageing infrastructure, and increased demand for energy and food, impacting water quantity and water quality. Managing water in regions to achieve various economic, environmental, and social goals is particularly challenging given most of the world's water resources are transboundary, crossing both intra- and inter-state administrative and political boundaries. In response to decreasing water quantity and diminishing water quality, water authorities, at multiple levels of governance, in differing regions of the world are implementing policy innovations that promote the application of demand management and green infrastructure to achieve regional water security for humans while protecting and restoring the natural environment"-- Provided by publisher