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Nature-based solutions (NBS) use or mimic natural processes to enhance water availability (e.g., soil moisture retention, groundwater recharge), improve water quality (e.g., natural and constructed wetlands, riparian buffer strips), and reduce risks associated with water-related disasters and climate change (e.g., floodplain restoration, green roofs). The WWDR 2018 demonstrates how nature-based solutions offer a vital means of moving beyond business-as-usual to address many of the world’s water challenges while simultaneously delivering additional benefits vital to all aspects of sustainable development. Disaster Governance Quality Risk Use/Reuse

This is the step-by-step monitoring methodology for SDG indicator 6.5.2, defined as the proportion of transboundary basin area with an operational arrangement for water cooperation. Governance Groundwater Surface water Transboundary

The 2017 edition of the United Nations World Water Development Report demonstrates how improved wastewater management generates social, environmental and economic benefits essential for sustainable development. In particular, the Report seeks to inform decision-makers, government, civil society and private sector, about the importance of managing wastewater as an undervalued and sustainable source of water, energy, nutrients and other recoverable by-products, rather than something to be disposed of or a nuisance to be ignored. The report’s title reflects the critical role that wastewater is poised to play in the context of a circular economy, whereby economic development is balanced with the protection of natural resources and environmental sustainability, and where a cleaner and more sustainable economy has a positive effect on the water quality. Pollution Quality Waste