The sedimentation is growing more strongly by flowing waters of the river San Juan towards Costa Rica through the Colorado River.
The fact was warned by the neighbors of the villages around Calero Island and confirmed by geologists who analyzed the seismic swarm in this part of the Caribbean.
Juan José López Ruiz, who lives in Guapote, said he sees the variations since 20 years ago when the Colorado River (which was created as an arm of San Juan) was strengthened gradually, to the point that now has two channels that are navigable.
“These are changes that occurred over the years, a creek that was 20 meters before, now reaches 80 meters, is navigable and is becoming wider,” he said.
Linkimer Lepolt Geologist, National Seismological Network (RSN), explained that the change in the San Juan comes from sedimentation, but did not rule out the fault lines are now activated in the Caribbean “may be controlling the drainage pattern in the area. “That is the object of study, he added.
Carlos Murillo Zamora, Professor in International Relations at the National University (UNA), said that the phenomenon is present from the nineteenth century and “will continue to be given.”
The specialist added that although the San Juan becomes a ditch, it will have no legal consequence because the boundary between Costa Rica and Nicaragua were clearly drawn since 1897, but warned that it would be political consequences. “Nicaragua has said it should be to share or allow navigation on the Colorado and that does increase the tensions between the two countries,” he said.
For the loss of San Juan river flow-of Nicaraguan sovereignty, the neighboring country started a dredging plan.
Meanwhile, on September 22, Calero Island is under observation because it is giving a seismic swarm, in a place where there are no historical records of such activity.
Until last Thursday had recorded 63 events. The high magnitude occurred on September 25 (4.2 moment magnitude) and September 30 (4.1 degrees).
The tectonic fault that generates precisely aligned newest arm of Colorado, the villagers called Caño Grande.
Linkimer said the flaw is about five kilometers long and is in a soft, marshy ground, where it is presumed that the sediments are consolidating.
He said that this break in Calero is a failure and it would cut capacity to produce a large earthquake, but it could generate one to 5.0 degrees which would have serious consequences.