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Environmental flows assessment integrating snow trout habitat requirements in the Shakhimardan basin, Central Asia

The increasing demand for hydropower development in Central Asia threatens the ecological integrity of high-mountain rivers. This study applies an ecohydraulics-based approach to assess environmental flow requirements for a diversion hydropower project on the Koksu River, Uzbekistan. We integrated high-resolution 2D hydrodynamic modeling with novel habitat data for snow trout (Schizothorax eurycephalus), incorporating fuzzy logic sets and rules to model habitat preferences across three life stages. Our findings recommend an environmental flow regime that maintains seasonal variability, with base flows ranging from 10.6% to 17.7% of the mean annual flow, ensuring habitat availability during critical life cycle periods. We contextualize the results within adaptive management frameworks by highlighting preliminary results from an ongoing biotelemetry study. This ecohydraulics-based approach provides a replicable model for environmental flow assessments in Central Asia and beyond.

Details

Type A1: Web of Science-article
Category Research
Magazine International Journal of Environmental Science and Technology
Issns 1735-2630
Language English
Bibtex

@misc{5d43de3f-0d2d-46aa-ab9b-05a49e31ec35,
title = "Environmental flows assessment integrating snow trout habitat requirements in the Shakhimardan basin, Central Asia",
abstract = "The increasing demand for hydropower development in Central Asia threatens the ecological integrity of high-mountain rivers. This study applies an ecohydraulics-based approach to assess environmental flow requirements for a diversion hydropower project on the Koksu River, Uzbekistan. We integrated high-resolution 2D hydrodynamic modeling with novel habitat data for snow trout (Schizothorax eurycephalus), incorporating fuzzy logic sets and rules to model habitat preferences across three life stages. Our findings recommend an environmental flow regime that maintains seasonal variability, with base flows ranging from 10.6% to 17.7% of the mean annual flow, ensuring habitat availability during critical life cycle periods. We contextualize the results within adaptive management frameworks by highlighting preliminary results from an ongoing biotelemetry study. This ecohydraulics-based approach provides a replicable model for environmental flow assessments in Central Asia and beyond.",
author = "Daniel S. Hayes and T. Hägele and I. Kopecki and Bernhard Zeiringer and Erkin Karimov and Bakhtiyor K. Karimov and Johan Coeck and Pieterjan Verhelst and J. De Keyser and Otabek Omonov and Matthias Schneider",
year = "2025",
month = sep,
day = "15",
doi = "https://doi.org/10.1007/s13762-025-06761-2",
language = "English",
publisher = "Instituut voor Natuur- en Bosonderzoek",
address = "Belgium,
type = "Other"
}

Authors

Daniel S. Hayes
T. Hägele
I. Kopecki
Bernhard Zeiringer
Erkin Karimov
Bakhtiyor K. Karimov
Johan Coeck
Pieterjan Verhelst
J. De Keyser
Otabek Omonov
Matthias Schneider