抄録
In order to assess future global water resources, it is necessary to comprehend the past and current water withdrawal trends and distribution. This study presents an estimate of global water withdrawal from 1950 to 2000 in 0.5 resolution by fully utilizing past and current withdrawal statistics as well as Historical equipped Irrigation Map (HIM) and a historical population data. By comparing our results to one from a physically simulated model, we could have an idea of whether a country has an agricultural water withdrawal larger than its crop requirement or not. Validation of a country scale distribution showed good agreement for the agricultural and domestic sector.
