From Wikipedia, the free encyclopedia
Jump to: navigation, search
Location Saxon Switzerland, Saxony,  Germany
Basin features
Main source Start: Confluence of the Sebnitz and the Polenz near Porschdorf
142 m above sea level (NHN)
50°56′36″N 14°08′06″E / 50.9432°N 14.1349°E / 50.9432; 14.1349Coordinates: 50°56′36″N 14°08′06″E / 50.9432°N 14.1349°E / 50.9432; 14.1349
River mouth Near Wendischfähre into the Elbe
127.8 m above sea level (NHN)
50°55′26″N 14°07′48″E / 50.9238°N 14.1299°E / 50.9238; 14.1299
Progression Elbe → North Sea
River system Elbe
Basin size 269 km² [1]
Physical characteristics
Length 3.0 km (1.9 mi), with the Polenz 34.3 km (21.3 mi) [1]
  • Location:
    at Porschdorf I gauge
  • Minimum rate:
    Average low: 860 l/s
  • Average rate:
    3.02 m³/s
  • Maximum rate:
    Average high: 30.8 m³/s

The Lachsbach, also called the Rathmannsdorfer Bach, is the largest, right-hand tributary of the Elbe in Saxon Switzerland.


The Lachsbach is formed by the merger of its headstreams, the Sebnitz (left, about half the size) and Polenz (right, rather longer) in the Elbe Sandstone Mountains near Porschdorf. The combined confluence section of the two rivers was first recorded in 1543 as die beyde wasser ("the two waters"), a description no longer common today. After only 3 kilometres, the Lachsbach empties into the Elbe above Prossen's winter port near Wendischfähre.


  1. ^ a b 1:25.000 topographical map