4.1. Hydrological and sedimentological dynamics leading to alluvial
deposits on back mangrove forests
According to Andriamasinoro (1993), ‘‘the river appears to be
the basic element in building the delta landscape. The abundance
or lack of clear water conditions hydrogeomorphological units and
mangrove species distribution’’. The hydrodynamic behavior of the
Mangoky River is directly related to the mechanism of alluvial
deposits, as this enables mud accumulation, the filling up of
channels, the shifting of watercourses and the formation of tidal
channels in the delta.