river channels

Natural hazards are the most significant threats in rural areas of Romania, while landslides, floods and bank river erosion are the geomorphological processes that impose the greatest risk in the Moldavian Plateau. We have identified 189 of disappeared, displaced and partially affected villages (in the area between Siret and Prut Rivers), using old cartographic materials as primary tool, and overlapping them with the present situation: ortophoto imagery and LiDAR derived high-resolution Digital Elevation Models (DEMs).

River channels are landforms created by flowing waters.

In digital format, the river channels can be represented as channels or as polygons.

For their geomorphometric analysis, it is necessary to create the middle line of the river bed. To create the middle line of the river bed, from the polygon topology, it must be transformed into a line, then into points, with the latter filling at a certain distance.

Using Thiessen's polygons, Thiessen polygons will be used.