Upper Dobra or Ogulin Dobra (Ogulinska Dobra in Croatian) is a typical torrential water with sudden and big changes in volume flow, while the average slope decline is 1.4%.
The Upper Dobra or Ogulin Dobra (Ogulinska Dobra in Croatian) shows features of a swift stream with sudden and considerable variations in its flow rate, maintaining an average slope decrease of 1.4%.