Low water levels endanger animals and plants – water should be able to flow freely through the stream
The ongoing drought is also affecting Darmstadt's streams. Many surface waters are currently carrying very little or no water at all. Along the Ruthsenbach stream, the city of Darmstadt is therefore now posting signs warning people not to alter the natural course of the watercourse by building their own dams.
Low water levels and the associated increase in water temperature can significantly deteriorate living conditions for animals and plants within a short period. Therefore, since June 27, 2026, the extraction of water from streams, ponds, and lakes within the city limits of Darmstadt has been largely prohibited by a general decree. This measure aims to prevent further drops in water levels and protect habitats.
Self-built dams can dry up sections of streams
A further problem arises, particularly at the Ruthsenbach stream. Children playing in the stream frequently create small dams from branches, stones, clay, or other materials. What initially seems harmless can have significant consequences given the current low water levels.
The damming of the stream alters the water flow. Downstream sections may receive even less water or dry up completely. This can be fatal for the fish, mussels, and small invertebrates of the streambed—the so-called macrozoobenthos—living there. Other animals that use the stream as a habitat or water source are also affected by the water scarcity.
Artificial barriers can also become problematic independently of dry periods. During heavy rain or floods, they impede the flow, can cause a backup, and thus contribute to the stream overflowing its banks.
Playing and exploring nature is expressly encouraged
The city has no intention of preventing children from playing at the Ruthsenbach stream. Environmental officer Michael Kolmer expressly welcomes the fact that children and families are discovering the stream as a natural space.
"This is fun – and that's how it should be," Kolmer emphasizes. "Because only those who know and love nature can protect it."
The city therefore asks that a few simple rules be observed: The stream and its banks should not be permanently altered. Disturbing the streambed should also be avoided. If dams are built from branches, stones, or other materials while playing, they should be completely removed afterward.
“This allows the water to flow freely again and the Ruthsenbach remains a vibrant habitat for animals and plants – and a place where experiencing nature and protecting the environment go hand in hand,” explains Kolmer.
(DARMSTADT – RED/PSD/stip)
