Untere Mulde River

The Mulde, also known as the United Mulde or Vereinigte Mulde, is a left-hand, non-navigable tributary of the Elbe. It originates southeast of Leipzig near Sermuth (Saxony) through the confluence of two large source rivers, the longer Zwickau Mulde and the Freiberger Mulde, which has a larger discharge and drains a larger catchment area.The river's catchment area encompasses large parts of Saxony and, in particular, the vast majority of the northern slopes of the Ore Mountains. With a water flow of approximately 73 m³/s at its mouth,[8] it is the fourth largest tributary of the Elbe.The old form of the Mulde's name, Milda, is translated by onomastics as "the watery one."[9] The word component "Mel," referring to milling, is sometimes associated with the name due to the large number of mills that once operated on the river, which ignores the fact that river names represent the oldest, often Slavic or Celtic, geographical name layer.
Source de.wikipedia.org/wiki/Mulde_(Fluss)

Although the confluence of the two source rivers occurs approximately halfway along the Mulde's entire course, the Freiberg and Zwickau Mulde already contribute over 80% of the total water volume. This is due, on the one hand, to the shape of the catchment area, which is very wide in the Ore Mountains and narrows towards the Elbe, and, on the other hand, to the higher precipitation and, at the same time, higher proportions of runoff water in the mountains. The shape of the catchment areas also means that the longer Zwickau Mulde is the smaller of the source rivers at the confluence.The dominant hydrological branch of the Freiberg Mulde's river system is the Zschopau. In its upper catchment area, it is a named tributary, the Flöha, which contributes the larger water flow and is thus the Mulde's actual source river. Along this main flow path, the Mulde is approximately 267 kilometers long, and along its longest flow path (the Zwickau Mulde), a good 314 kilometers.[3]The Mulde catchment area has total gradients of 600 to 900 meters for many important flow paths, resulting in exceptionally high flow velocities for northern Germany. The Mulde is sometimes even described as the fastest-flowing river in Central Europe.[10]
Source: de.wikipedia.org/wiki/Mulde_(Fluss)

The Mulde River runs exclusively in the North German Plain, initially flowing through the Saxon Hills and passing Grimma, Nerchau, and Trebsen. Approximately near Wurzen, along the western edge of which it runs, the Mulde reaches the Elbe-Mulde Lowland. It then flows through Eilenburg and Bad Düben, and shortly thereafter leaves Saxon territory. The Mulde covers the rest of its course to its mouth in Saxony-Anhalt.The Mulde continued to flow west of the two towns of Pouch and Friedersdorf in the area of today's Goitzschesee until 1975. Since then, it has been dammed east of the two towns in the Mulde Reservoir – a former open-cast mine. The Mulde then flows past Muldenstein, Jeßnitz, Raguhn, and Dessau, and flows into the Elbe between Dessau and Roßlau after a distance of 147 km.[2]The "Wilde Mulde" revitalization project for the lower reaches of the river in Dessau was recognized as an official project of the UN Decade on Biodiversity in November 2018.[11][12]
Source: de.wikipedia.org/wiki/Mulde_(Fluss)