Evaluation Of The Quality Of The Aquatic Habitat And Fish Covers For Brown Trout Of The Drietomica River By Rhabsim Model

Year, pages: 2012, 126 - 134

Ecological status of the river is influenced by many factors, of which the most important are fauna and flora; in this paper defined as habitat. During the years 2004, 2005, 2006 and 2011, research of the hydroecological quality was evaluated in the reference section of the Drietomica River. Drietomica is a typical representative river of the Slovak flysch area and is located in north-western part of the Slovakia, in the region of White Carpathians. In this article the results of microhabitat modeling by means of Instream Flow Incremental Methodology (IFIM) are presented. For the 1- dimensional modeling, the River Habitat Simulation System (RHABSIM), was used to analyse the interaction between a water flow, morphology of a riverbed and biological components of the environment. Hydroecological quality was evaluated after detailed ichthyological, topographical and hydro-morphological surveys. The main step was the assessing of the biotic habitat characteristics through the suitability curves for Brown trout. Suitability curves are a graphic representation of the main biotic and abiotic preferences for microhabitat´s components. The suitability curves were derived for the depth, velocity, fish covers and degree of the shading. For evaluating the quality of the aquatic habitat 19 fish covers were closely monitored and evaluated. The results of the Weighted Usable Area (WUA = f (Q)) were evaluated from a comprehensive assessment of the reference reach of the Drietomica River. IFIM methodology, RHABSIM model, bioindication, Weight Usable Area (WUA)

Škrovinová, M., Stankoci, I., Kráľová, J., Macura, V. 2012. Evaluation Of The Quality Of The Aquatic Habitat And Fish Covers For Brown Trout Of The Drietomica River By Rhabsim Model. In Acta Hydrologica Slovaca, vol. 13, no.1, pp. 126-134. 2644-4690.

Škrovinová, M., Stankoci, I., Kráľová, J., Macura, V. (2012). Evaluation Of The Quality Of The Aquatic Habitat And Fish Covers For Brown Trout Of The Drietomica River By Rhabsim Model. Acta Hydrologica Slovaca, 13(1), 126-134. 2644-4690.