Please note that the content of this book mainly consists of articles that are available online from Wikipedia or other free sources. The Deich- und Hauptsielverband Dithmarschen (DHSV Dithmarschen) is a water and land association whose area of jurisdiction encompasses the Dithmarschen region. The DHSV Dithmarschen was established in 1972 from the merger of the two dike and main drainage associations of Norder- and Süderdithmarschen and is based in Hemmingstedt. It is the umbrella association for 55 dike and drainage associations and also serves as the processing area association for processing area 9, which is mostly located in the Eider river basin, but also extends into the Elbe river basin. The legal supervision of the DHSV Dithmarschen is exercised by the district administrator of Dithmarschen.