The local situation Sundhausen and the industrial estate "An der Darre" in Nordhausen were in the floodplain of the helmets and greater than 40 m³ / s were inundated with flood discharges. During the planning measures for flood control should be established.
natural transformation of helmets by bioengineering constructions inside and outside the local situation Sundhausen
In a variant study various possibilities have been established to improve flood protection and tested for feasibility, cost and engage in the types.
As a preferred option, the construction of a flood polders in shunt to apex capping and rehabilitation of the existing flood protection facilities in the local situation in connection with the implementation of a restructuring measures in the area of riverbed dynamics was developed.
For the detection and evaluation of the intervention, a landscape conservation plan, a wildlife conservation Post, an FFH preliminary assessment and an environmental impact study was required.