Its largest tributary is the Byala reka ("white river") in Bulgaria, which flows into the Luda reka near the village Odrintsi.
Hydrology
The Erythropotamos River basin covers an area of approximately 1,618.5 km², with most of it in Greece's Thrace region and a smaller part in Bulgaria. The region's geological formations include orthogneisses, augen gneisses, pegmatites, marbles, amphibolites, and sediments. Elevations range from 16 meters to 1,258 meters above mean sea level, with a predominantly hilly terrain.[1]
Flood Events and Susceptibility
The Erythropotamos River is prone to frequent flooding, particularly in its lower reaches. Significant flood events have occurred in 2010, 2017, and 2018, causing considerable damage. Flood susceptibility mapping has been carried out using GIS and remote sensing technologies, identifying high-risk zones and validating them with SAR imagery. Approximately 60% of recent flood areas intersect with high susceptibility zones on these maps.[2]
Invasive Species
The Erythropotamos River has been affected by the introduction of invasive species, such as the Asian clam (Corbicula fluminea).[3] This species was first recorded in Greece within the Erythropotamos River, likely spreading downstream from Bulgaria. The presence of this species poses ecological risks and challenges for river basin management.
