A hydrographic node corresponds to a change in water flow. It is always located at the end of an elementary hydrographic section.
The water node class of BD Carthage Guyana includes: — confluences, diffluences, sources, mouth and losses of rivers; — dams; — dams along water; — locks (for passage or radoub); — sources and cascades of tourism interest. A hydrographic node is located by a geometric summit. Some nodes correspond to an outlet of a hydrographic area.
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