Meiereibach (Darmbach)
Dairy Bach on the upper field in Darmstadt
The dairy creek is a tributary of the intestinal stream in Darmstadt.
It rises at the Three Fountains source at Hofgut Oberfeld in the Erbacher Road in Darmstadt east and flows to the intestine Bach today by the Darmstadt sewer systems.
Course
Until the early 1980s the dairy Bach was partially as open waters of the Three Fountains source through the grounds of the club Hottonia eV in the Jews pond. After the Jews pond he continued to flow to the Botanical Garden and culminated in the intestinal stream before it flowed into the Great Woog.
Since the restoration and publication of Bach's dairy farm at Hofgut Oberfeld (from 2008) it flows now "open" by the former Paddock at Hofgut. Its meandering course, following the Jews pond abruptly to an end, because by the construction of the federal highway 26 in the 1970s to be the previously described flow path has been truncated. Since then, this water flows behind the Jews pond in the Darmstadt sewer system. It is therefore beside the intestinal stream, the second stream of Darmstadt, which is headed deliberately into sewers. Also for the initiation of this creek water pays the city of Darmstadt an annual wastewater fee of approximately 530,000 euros.
Use and water quantity
The dairy stream is characterized by a very constant water freight that was already used in earlier times by the city of Darmstadt. Between 1535 and 1546 the first time the water of dairy Bach was arrested in 1568 and moved in pipelines to the city center of Darmstadt, to supply parts of the city with water. The so-called Three Fountains line is a term used today in many intestinal townspeople.
Average annual flow in the dairy stream from approximately 235,000 cubic meters of water. Its average discharge is about 10 liters per second. Even in very dry summers, a minimum flow of 3 liters per second is not exceeded. The dairy Bach performs no distinct flood because it directly fed from the wider source area and no significant amounts of water flow to above ground. Therefore His maximum discharge remains below 100 liters per second.
Ecology
The dairy stream transports currently still an increased cargo of phosphates and nitrates, which does not allow an immediate lead in the intestinal stream or in the Great Woog. Since the phosphate and nitrate concentrations of the intestinal Bach and the Great Woogs are low, a supply of dairy Bach would be a risk to the water quality of the popular Darmstadt bathing pond. As a minimum factor for the development of algae in the Great Woog while the phosphate concentration is decisive.
Where the load on the dairy farm creek water comes, is not yet clarified. In previous plans, it was assumed that the nutrient load of dairy Bach in particular come with ortho- phosphates from the former intensive farming on the upper field and would be reduced to biodynamic farming in the course of time after the conversion of rural court Oberfeld. After such a development trend did not occur, the Phorphorsituation in dairy Bach was examined in more detail in two student work at Darmstadt University. According to recent studies it is assumed that the critical for the bathing water Big Woog phosphorus pollution of the water is geogenic origin. The necessary water treatment, the city is planning a Phosphatadsorbtion of granules. In addition it is planned to replace the existing septic tanks in the catchment area and pipes or to connect to the sewer system, to ensure their tightness and therefore to be able to guard against a possible other producers of this increased nitrate and phosphate values .
Future of the dairy Bach
By 2016, the dairy farm valley shall again be linked from the sewer system of the city of Darmstadt and are fed by a culvert pipeline under the road 26 passes his former creek bed through the Botanical Gardens. The intestine Bach will thus be powered by the very constant water load of dairy Bach in low rainfall periods, and the Great Woog gets longer lasting heat waves have a regular supply of fresh water.
Varia
In March 2008, has been found at excavation work on the restoration of Bach's dairy farm on the former horse paddock at Hofgut Oberfeld in the immediate vicinity of the open there again flowing dairy Bach stone caverns, the earlier components of the water supply were. This was then backed up by the notified conservation department of the city of Darmstadt and placed under protection.