Riviera Maya - Geography

Geography

The Riviera Maya is completely within the state of Quintana Roo on the Yucatan Peninsula of Mexico. The terrain is flat and covered by low tropical jungle. The geology is high purity carbonates down to a depth of 0.5 - 1.5 km below the surface. Mean annual rainfall is 1.5 m per year and the efficient infiltration results in the complete absence of any surface rivers. As is common in karst, underground river network have formed by dissolution, and these have been explored and mapped by cave diving through sinkhole collapses locally called cenotes. The whole of the Yucatan Peninsula is underlain by a density stratified coastal aquifer system with a lens shaped fresh water body floating on top of intruding saline water. The formation of caves (speleogenesis) within this coastal carbonate aquifer is principally associated with carbonate dissolution at the fresh-saline water contact within the aquifer. By 2008, the Quintana Roo Speleological Society (QRSS) reported more than 700 kilometres (430 mi) of flooded cave passages within the limits of the Riviera Maya including the two longest underwater cave systems in the world of Sac Actun and Ox Bel Ha. These groundwater resources, accessed via the thousands of cenotes throughout the landscape, once supported the Maya civilizations and today remain the only natural sources of potable water in the area.

The Caribbean coastline is a series of crescent shaped white sand beaches interrupted every 1 – 10 km by rocky headlands and inlets, called caletas, through which groundwater discharges into the coastal water. Large sections of the extensive mangrove swamps that lie behind the beaches and headlands are included in the areas scheduled for tourism development.