| Popis: |
Mexico’s annual average natural volume of water amounts to 446 km3 (about 0.2% of the total volume of water in the world, which is 200,000 km3). Mexico receives about 1489 thousand million m3 a year as rain—67% of this volume falls between June and September. The precipitation distribution is unequal across the territory. The southern states of Chiapas, Oaxaca, Campeche, Quintana Roo, Yucatan, Veracruz, and Tabasco get 49.6% of the total volume of precipitation. Of the total precipitation, it is estimated that 73% is lost to evapotranspiration, 22% becomes runoff to surface-water bodies, and 6% infiltrates groundwater aquifers (CONAGUA, Atlas del Agua en Mexico 2016. Comision Nacional del Agua, Ciudad de Mexico, 2016a). |
