Research has shown that mixing of both river waters in the crossing amounts to only 10%.
This has been established by analyzing the water for biological communities that differ slightly in the two rivers.
The differences have been found to persist even after the crossing.
About 2.4 km down, Nielba eventually flows into Welna near Legowskie Lake.
The river Wena is the most prominent element of this hydrographic online grid in the vicinity of Wagrowiec.
In the 19th century, the town decided to regulate the waters of Welma for irrigation purposes.
One of the top priorities was to ensure a quick outflow of surplus water.
Wagrowiec Bifurcation on Google Maps.
Sources:B. Braun Avitum,Regional Museum in Wagrowiec,Poland.travel,Pjoes.com
