Ecological Status Assesement of the River Basin CRNA 2021 – 2022 Case Study
Abstract:
Maintaining good ecological status of water bodies is very important and also it is a challenge today, because of industrial influences, municipal wastewater as well as pollution from agricultural activities. Benthic diatoms as a part of phytobenthos and benthic macroinvertebrates are very sensitive to organic and inorganic pollution and as a biological quality elements (BQS) are used for ecological assessment of water quality. The river Crna, is a right tributary to the river Vardar. The aim of this study is to present the pollution of the River Basin Crna, based on the ecological status assessment of the water bodies. Ecological status assessment of water bodies in this basin was assessed by the physico-chemical parameters, metals, benthic diatoms communities and benthic macroinver tebrates. The research was conducted on 13 sampling stations in 2021 and on 12 sampling stations in 2022, in the spring and autumn. The ecological status of the water bodies according diatoms was assessed with IPS calculation and the corresponding ecological quality ratio (EQR). According to the benthic macroinvertebrates the ecological status was assessed with the indices SI, BMWP, ASPT and the Number of taxa. The research has shown differences in ecological status on the water bodies in the River Basin Crna and according to the assessment five of the water bodies (VT_3 - Prilepska River in front of the river inflow in Borotinsko Blato - Bakarno Gumno, VT_4 - Borotinsko Blato in front of the river inflow in Crna River - v. Chepigovo, VT_5 Dragor in front of the river inflow in Crna River in 2021, VT_6 - Crna River v. Novaci and VT_15 - Crna River v. Skochivir), have bad ecological status.
