text: This right upper branch of the Speltach hat the name "Buchbach''. It's probably wrongly name "Speltach"  due to  the official hydrograph's habit of putting an name on the complete succession of waterbody sections from the river mouth up to some souce, whatever the real names of the sections gobbled up for that purpose may be.
  
  You may nowadays find the name "Buchbach" for this branch on the layer "Gewässername" of the  official hydrographical state server 
  
  http://udo.lubw.baden-wuerttemberg.de/public/pages/map/default/index.xhtml
  
  Layer which is more recxent than the layer ""Gewässernetz" which doese the gobbling up to enforce artifically a common name for the designed main branch mouth-to-source.
  
  (I wouldn't like to put an oath to the names "Seelesbach'' and ''Bichbach'' being correctly assigned upstream of Bonolzhof.)