Usage of biotic indices in evaluating the impact of the urban centres on the quality of the water in rivers
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2012, Vol 5, Issue 2
Abstract
The quality of the river waters of the Crişul Repede River and the influence of the powerful urban and industrial centre Oradea upon these have been studied by means of collecting quantitative samples of benthos, for three consecutive years, in a seasonal manner. The calculation of the biotic indices that consider the abundance of benthic macroinvertebrates indicating the presence of high qualitative waters (Ephemeroptera, Plecoptera and Trichoptera) and of those indicating strong loading of the waters and of the under layer of the water ecosystem with organic matter (Diptera – Chironomidae Family), highlighted an advanced degradation of the water quality, from the upstream towards the downstream. Equally, the intensity of the process of degradation of the water quality has been established, which, in the case of this river, is very strong and visible by the increasing prevalence of groups that do not require special ecological conditions, proving to be resistive and even proliferating in the presence of intense pollution of the water.
Authors and Affiliations
Adrian Sinitean, Milca Petrovici
Keywords
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