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As can be seen from the graph, three sectors’ water usage experienced a growing trend throughout the century. The agriculture’s water consumption was at a higher level, growing marginally from approximately 500km3 (1900) and shot up to nearly 2900km3 (2000). In 1900, the industrial’s water usage (around 100km3) was bigger than the domestic’s one (about 50km3). Both segments had a slow improvement by 1950. However, their water consumptions consistently rose to 1000km3 (industrial) and roughly 400km3 (domestic) in 2000.
The population, irrigated land and water use per person in Brazil and Congo were being analysed during 2000. Brazil’s land size was significantly larger (26500km2) and that their population was correspondingly huge too (176 million). Accordingly, a Brazilian consumed 359m3 of water. In contrast, Congo’s population (5.2 million) and land (100km3) were in smaller sizes, with only 8m3 of water consumption per person.
Overall, the agriculture’s water usage was the greatest and followed by the industrial and the domestic sectors. Meanwhile, the population, land size and water use in Brazil were relatively higher than that of Congo.
