PeerJ Author 35 Points Contributions by role Preprint Author 35 Contributions by subject area Ecology Ecohydrology Environmental Contamination and Remediation Environmental Impacts Food, Water and Energy Nexus Olena Mitryasova PeerJ Author Summary Aquatic & Marine Chemistry Environmental Impacts Past or current institution affiliations Petro Mohyla Black Sea State University PeerJ Contributions Preprints 1 February 2, 2018 - Version: 1 Basin of small rivers as an indicator of the environment state Olena Mitryasova, Volodymyr Pohrebennyk https://doi.org/10.7287/peerj.preprints.26481v1