The river Wieda in the German state of Lower Saxony

Lower Saxony

Lower Saxony is a German state situated in north-western Germany and is second in area and fourth in population among the sixteen states of Germany...

 has its source above the village of Wieda

Wieda

Wieda is a municipality in the district of Osterode, in Lower Saxony, Germany....

, flows through the village of Walkenried

Walkenried

Walkenried is a municipality in the district of Osterode, in Lower Saxony, Germany. It is situated in the southern Harz, approx. 15 km south of Braunlage, and 15 km northwest of Nordhausen....

, the hamlet of Wiedigshof and the village of Gudersleben before discharging in the Harz river, the Zorge

Zorge (river)

The Zorge is a tributary of the River Helme in central Germany. It is about 40 km long and flows from the state of Lower Saxony into Thuringia...

 near Woffleben. Its channel regularly dries up in the summer months - it sinks into the karst

KARST

Kilometer-square Area Radio Synthesis Telescope is a Chinese telescope project to which FAST is a forerunner. KARST is a set of large spherical reflectors on karst landforms, which are bowlshaped limestone sinkholes named after the Kras region in Slovenia and Northern Italy. It will consist of...

 soil and and reappears in other places as springs. Its most important tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 is the Uffe

Uffe (Wieda)

The Uffe is a German river in the states of Lower Saxony and Thuringia.It has its source on the Großer Bockstalskopf in Lower Saxony, a subpeak of the Ravensberg mountain, and flows through the town of Bad Sachsa down to the village Neuhof...

.