Sutla


The Sutla or Sotla is a river flowing through Slovenia and Croatia, mostly forming their border. It is a tributary to the Sava, itself a tributary to the Danube. It is long and has a watershed area of.

Overview

The Sutla flows through the following municipalities:
The hydrological parameters of the Sutla are regularly monitored in Croatia at Zelenjak.
The division of the Sutla/Sotla basin area between Croatia and Slovenia is inconsistent in sources; Croatian sources claim either or, while Slovenian sources claim either or.
The Kozje Park, established in 1981 as the Trebče Memorial Park, is located in the Slovenian territory to the west of the Sotla. It covers of the landscape of Kozje Hills, including wetlands along the Sotla. It is the habitat of over 120 bird species and of about 950 higher plant species.
The earliest known mention of Sutla was in 1028, as Zontla. It has been suggested that the names Sutla and Sava are related, but this is uncertain. Another theory is that the name Sutla comes from the Indo-European root *su, meaning 'swine'.