, Top 5 Most
, The Environment
P. H. Gleick, Pacific Institute. (2013). Total Renewable Freshwater Supply
Data is total renewable water resources (km3
per year estimated). The TRWR is calculated from: average precipitation, internal resources (surface & groundwater) and external resources (natural & actual). The accuracy and reliability of information vary significantly between regions, countries
and types of data. No consistency can be ensured at regional level on the duration and dates
of the period of reference. List last updated January 28th, 2015.