Òtù Na-ahụ Maka Ihe Ndị Na-eme n'Ụlọ Nzukọ nke Germany
German Speleological Federation (German: Verband der deutschen Höhlen- und Karstforscher, VdHK) bụ nche anwụ nzukọ maka speleologists na Germany na ebe a na-akpọtụrụ maka okwu metụtara ọgba na karst odida obodo.  Klọb mpaghara 90 (ọkachasị ụlọ ịgba egwu) na otu, yana federation steeti ise na ihe karịrị ndị otu 500, so na Federation.  Ebumnobi ya bụ isi bụ nyocha na nchekwa nke ọgba na atụmatụ karst na Germany.  Nchọgharị ọgba na Germany bụ ọrụ afọ ofufo nke a na-etinye na ntinye aka nke VdHK na ndị otu ya.  Ihe kacha ha mkpa bụ ilekọta karst eke na ala ọgba n'ụzọ kwesịrị ekwesị.  Federation bụ otu ndị ọrụ afọ ofufo.

E hiwere Federation na 1955 na Donauwörth na isi ụlọ ọrụ ya dị na Munich.  Federation ahụ na-ahụ onwe ya dị ka onye ga-anọchi anya Federation of German Speleologists (Hauptverbandes Deutscher Höhlenforscher), nke dị site na 1922 ruo 1945, na German Karst Exploration Union (Deutsche Gesellschaft für Karstforschung), nke sitere na 1947 ruo 1950.

The VdHK is a member of the Union Internationale de Spéléologie (UIS).