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Watershed Planning within a Quantitative Scenario Analysis Framework
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A conceptual framework for hydropeaking mitigation.

Andreas Bruder1, Diego Tonolla2, Steffen P Schweizer3

  • 1Eawag, Swiss Federal Institute of Aquatic Science, Surface Waters - Research and Management, Seestrasse 79, 6047 Kastanienbaum, Switzerland; University of Applied Sciences and Arts of Southern Switzerland, Institute of Earth Sciences, Campus Trevano, 6952 Canobbio, Switzerland; Wasser-Agenda 21, Überlandstrasse 133, 8600 Dübendorf, Switzerland.

The Science of the Total Environment
|June 9, 2016
PubMed
Summary
This summary is machine-generated.

Hydropower plants cause hydropeaking, impacting river ecosystems. A new framework aids evaluating mitigation measures for these unnatural discharge fluctuations, improving ecological assessments.

Keywords:
Discharge fluctuationsEcological indicatorsFunctional indicatorsHydroelectricityMultiple stressorsPrediction toolsRiver restoration

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Area of Science:

  • Environmental Science
  • Hydrology
  • Ecology

Background:

  • Hydropower plants are crucial for renewable energy, but can cause hydropeaking (unnatural discharge fluctuations).
  • Hydropeaking significantly alters river hydrology, hydraulics, and sediment regimes, negatively impacting aquatic ecosystems and biota.
  • Assessing the ecological benefits of hydropeaking mitigation measures remains a challenge.

Purpose of the Study:

  • To develop a conceptual framework for evaluating hydropeaking mitigation measures.
  • To support ecological assessments of current and future mitigation projects.

Main Methods:

  • Developed a framework based on Swiss projects and literature, refined by international experts.
  • Framework utilizes indicators covering hydropeaking phases and affected abiotic/biotic processes.
  • Quantitative prediction of mitigation effects using discharge scenarios and habitat models.

Main Results:

  • The framework enables quantitative prediction and comparison of mitigation measure effectiveness.
  • It allows comparison against pre-mitigation conditions and reference river sections.
  • Identified key issues for improving project efficiency: spatial-temporal context, river morphology interactions, and monitoring.

Conclusions:

  • The developed framework provides a structured approach to evaluate hydropeaking mitigation effectiveness.
  • It facilitates informed decision-making for ecological restoration in hydropower-affected rivers.
  • Addressing identified key issues will enhance the success of future mitigation efforts.