There are indeed two rivers called Krka, one in Slovenia and one in Croatia. However, it is not the same river, as geographically, they are not even close. Croatian Krka river springs in the foothills of the Dinara mountain range, 2.5 km northeast of the historical Croatian city of Knin. The total length of the river from the spring to the Adriatic sea is 72.5 km, with the submerged part of the river included.