Data Source: Ministry of Ecology and Environment, provincial and municipal bureaus of ecology and environment and bureaus of water resources
Data Source: United Nations Environment Programme (2017). GEMStat database fo the Global Environment Monitoring System for freshwater (GEMS/Water) Programme. International Centre for Water Resources and Global Change, Koblenz. Accessed 26 August 2021. Available upon request from GEMS/Water Data Centre: gemstat.org