http://dx.doi.org/10.5902/223611705021All in planet Earth, the volume of salt water found in oceans and seas is about 97%; the other 3% isfresh, but they are found in glaciers or underneath the earth surface, in aquifers, and it is difficultto access them. Only 0.007% of freshwater is found in rivers, lakes and in the atmosphere - theeasy access water to human being. Brazil has 13.7% of surface freshwater in the World and 70% ofthis amount is at Amazon. The other 30% are distributed throughout the country. The growing ofwater needed by the population concentration and the water disponibility in certain areasdemands to plan how to use this water. Based on these points some statistical methods were usedas models of regression and timing series, taking Holt-Winters Methodology as a basic tool tomodel the water consumption withing coming decades.
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