Grenff
The Grenff, also Grenf, is an approximately 21.9 km long, right-hand or southeasterly tributary of Schwalm in East Hesse Highlands in North Hesse Schwalm-Eder-Kreis and belongs to the river system and catchment area of the Weser.Course
The Grenff rises in Ottrauer Highland, a part of the Fulda-Haune Plateau in East Hesse Highlands, in the transition area to the Knüllgebirge.
The source is 1.2 km southeast of the village Görzhain in a clearing of the northern flank of the Frohnkreuzkopf, the western spur of the Rimberg, at about 395 m elevation.
Initially flows the Grenff which runs predominantly north-west, to and through Görzhain. From there on the Bad Hersfeld–Treysa railway runs through the Grenff valley. It passes along the settlement Bahnhof Ottrau and a number of watermills and the village Kleinropperhausen.
Then the Grenff flows through the riverside towns Nausis, after which it flows past the Bruchmühle, Neukirchen, Rückershausen, after which it passes the Sängermühle, and Riebelsdorf.
Thereafter, the river passes the station Zella and Klinkemühle. At the village of Loshausen
it flows into the Eder tributary Schwalm that comes from the south, after overcoming of approximately 181 m difference in altitude.The drainage basin of Grenff includes 86.406 km². Its tributaries are , river length and confluence location, Grenff river kilometer :
