Excursion to the Ecological Station Neunzehnhain and Reservoir Management

by Yulia Mariska (EM40)

On 15th – 16th June 2017, the participants of the 40th UNEP/UNESCO/BMUB International Postgraduate Course on Environmental Management had the opportunity to visit the Ecological Station Neunzehnhain and learn more about reservoir management.  Located about 80 km south-west of Dresden in the “Ore Mountains”. First day, the group transferred to dam Neunzehnhain II guided by the Dam Administration Saxony.  The area of the dam are not populated and surrounded by almost 80% of forests as drinking water protection. The main reason is to keep the good water quality because the dam’s primary purpose is for  drinking water supply of the nearby located city of Chemnitz with a storage capacity of about 3 million cubic meters.

The second day started with a lecture about freshwater organism and quality indicators by Ms. Beesk (TU Dresden); in this session, the participants were equipped with microscopes to see some of the micro-organisms in the water sample and then continued to have get some explanation about water quality indicators in the reservoir Neunzehnhain II. The next session was guided by Dr. Paul (TU Dresden), he explained about the water quality and quantity management in reservoirs and how it can be used as a bio-manipulation tool to manage fish stocks.

After having lunch the excursion proceeded to dam Saidebach guided again by Dr. Paul for another session about land use in the catchment area, water and sediment treatment, catchment protection and climate change issues. The dam Saidebach like the dam Neunzehnhain II also functions as a drinking water reservoir with a capacity of 22 million cubic meters.

Excursion to the DREWAG Drinking Water Purification plant at Dresden Tolkewitz

By Binh Pham Doan Thanh (Vietnam)

13 September, we had the next interesting excursion to Waterworks Tolkewitz, which was  built about one hundred years ago. It is placed on the left bank of the Elbe River and uses the river water as a source for producing drinking water. At the plant we were welcomed by the former head of the Water works Tolkewitz, a very kind and experienced man. During the following hour he explained the formation and development of the drinking water supply system of Dresden. After that, we visited the drinking water treatment area. The pipe system is completely isolated from the external environment to make sure that the water will always meet all standards and norms. It was a system worth learning. Finally, I would like to thank Dr. André Lindner for his translation work during the whole excursion.