Publications de Amin Niayifar | EPFL Graph Search

Frontiers of (Pareto) Optimal and Sustainable Water Management for Hydropower and Ecology

David Andrew Barry, Paolo Perona, Pierre Razurel, Amin Niayifar

River regulation alters the natural flow regime of streams with consequent impacts on terrestrial and aquatic habitats of the riparian zone. The severity of such impacts can be modulated by changing the redistribution rules at water intakes and reservoirs. ...

2021

Morphogenesis and oxygen dynamics in phototrophic biofilms growing across a gradient of hydraulic conditions

Amin Niayifar, Tom Ian Battin, Hannes Markus Peter, Anna Depetris, Michael Kühl

Biofilms are surface-attached and matrix-enclosed microbial communities that dominate microbial life in numerous ecosystems. Using flumes and automated optical coherence tomography, we studied the morphogenesis of phototrophic biofilms along a gradient of ...

2021

Hydrological and hydraulic solutions for the sustainability of habitat life in human altered streams

Amin Niayifar

In this thesis, I aim to contribute to the research towards improving the sustainability of habitat life in streams affected by anthropogenic activities. With the growing trend of altering natural water regimes due to hydropower operations, irrigation, and ...

EPFL2019

Distinct air–water gas exchange regimes in low- and high-energy streams

Amin Niayifar, Tom Ian Battin, Amber Joy Ulseth, Marta Boix Canadell

2019

Improving the ecohydrological and economic efficiency of Small Hydropower Plants with water diversion

Pierre Razurel, Amin Niayifar

2018

Modeling Macroroughness Contribution to Fish Habitat Suitability Curves

Paolo Perona, Holly Jayne Oldroyd, Amin Niayifar

Improved water management strategies necessitate a solid understanding of environmental impacts associated with various flow release policies. Habitat suitability models use hydrodynamic simulations to generate weighted usable area curves, which are useful ...

American Geophysical Union2018

Dynamic water allocation policies improve the global efficiency of storage systems

Paolo Perona, Amin Niayifar

Water impoundment by dams strongly affects the river natural flow regime, its attributes and the related ecosystem biodiversity. Fostering the sustainability of water uses e.g., hydropower systems thus implies searching for innovative operational policies ...

Elsevier2017

Analytical Modeling of Wind Farms: A New Approach for Power Prediction

Fernando Porté Agel, Amin Niayifar

Wind farm power production is known to be strongly affected by turbine wake effects. The purpose of this study is to develop and test a new analytical model for the prediction of wind turbine wakes and the associated power losses in wind farms. The new mod ...

Mdpi Ag2016

Searching Pareto-efficient dynamic environmental flows by means of nondominated sorting genetic algorithms II

Paolo Perona, Amin Niayifar

2016

A new analytical model for wind farm power prediction

Fernando Porté Agel, Amin Niayifar

In this study, a new analytical approach is presented and validated to predict wind farm power production. The new model is an extension of the recently proposed by Bastankhah and Porte-Agel for a single wake. It assumes a self-similar Gaussian shape of th ...

Iop Publishing Ltd2015