Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XIV
Written by Diana KIRIN, Petya ZAHARIEVA, Radoslava ZAHARIEVA, Georgi PATRONOV, Marian VARBANOV, Gergana METODIEVA, Dimitrinka KUZMANOVA
This study assesses the ecological state of the Borovitsa River, a tributary of the Arda River sub-basin, and the Maritsa River basin using a methodology approved for the European Union and Bulgaria. For the purpose of the study, in the spring of 2024, macroinvertebrates samples were collected from the Borovitsa River near the village of Nenkovo (in the section between Borovitsa Reservoir and Kardzhali Reservoir, according to Bulgarian river typology, this section is classified as R14:“Sub-Mediterranean small and medium-sized rivers” according to the typology of rivers in Bulgaria. The collected macrozoobenthos were taxonomically identified. Fourteen taxa were identified, based on which key ecological metrics were calculated - EPT taxa, Margalef species richness index (Dmg), Shannon-Weaver species diversity index (H’), Pielou’s evenness index (E), Simpson’s dominance index (C) and biotic index (BI). The findings provide valuable insights into the biodiversity and ecological status of the Borovitsa River, contributing to regional water quality assessments and conservation efforts.
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