Each year UNESCO releases a World Water Assessment Report, a document that explores potential solutions to the globe's water problems. The 2018 report will focus on nature based solutions.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/why-unescos-natural-solutions-water-problems-wont-work-africa
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/phys
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-management
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/unesco
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-quality
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-supply