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Atle Harby
SINTEF Energy Research, Trondheim, Norway

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Journal article
Published: 07 July 2021 in Environmental Modelling & Software
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Human-made reservoirs are now recognized as potentially significant sources of greenhouse gases, comparable to other anthropogenic sources, yet efforts to estimate these reservoir emissions have been hampered by the complexity of the underlying processes and a lack of coherent budgeting approaches. Here we present a unique modelling framework, the G-res Tool, which was explicitly designed to estimate the net C footprint of reservoirs across the globe. The framework involves the development of statistically robust empirical models describing the four major emission pathways for carbon-based greenhouse gases (GHG) from reservoirs: diffusive CO2 and CH4 emissions, bubbling CH4 emissions from the reservoir surface, and CH4 emissions due to degassing downstream the reservoir, based on an extensive meta-analysis of published data from the past three decades. These empirical models allow the prediction of reservoir-specific emissions, how they may shift over time and account for naturally occurring GHG generating pathways in aquatic networks.

ACS Style

Yves T. Prairie; Sara Mercier-Blais; John A. Harrison; Cynthia Soued; Paul del Giorgio; Atle Harby; Jukka Alm; Vincent Chanudet; Roy Nahas. A new modelling framework to assess biogenic GHG emissions from reservoirs: The G-res tool. Environmental Modelling & Software 2021, 143, 105117 .

AMA Style

Yves T. Prairie, Sara Mercier-Blais, John A. Harrison, Cynthia Soued, Paul del Giorgio, Atle Harby, Jukka Alm, Vincent Chanudet, Roy Nahas. A new modelling framework to assess biogenic GHG emissions from reservoirs: The G-res tool. Environmental Modelling & Software. 2021; 143 ():105117.

Chicago/Turabian Style

Yves T. Prairie; Sara Mercier-Blais; John A. Harrison; Cynthia Soued; Paul del Giorgio; Atle Harby; Jukka Alm; Vincent Chanudet; Roy Nahas. 2021. "A new modelling framework to assess biogenic GHG emissions from reservoirs: The G-res tool." Environmental Modelling & Software 143, no. : 105117.

Journal article
Published: 15 October 2020 in Sustainability
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To promote the sustainable management of hydropower, decision makers require information about cost trade-offs between the restoration of fish passage and hydropower production. We provide a systematic overview of the construction, operational, monitoring, and power loss costs associated with upstream and downstream fish passage measures in the European context. When comparing the total costs of upstream measures across different electricity price scenarios, nature-like solutions (67–88 EUR/kW) tend to cost less than technical solutions (201–287 EUR/kW) on average. Furthermore, nature-like fish passes incur fewer power losses and provide habitat in addition to facilitating fish passage, which presents a strong argument for supporting their development. When evaluating different cost categories of fish passage measures across different electricity price scenarios, construction (45–87%) accounts for the largest share compared to operation (0–1.2%) and power losses (11–54%). However, under a high electricity price scenario, power losses exceed construction costs for technical fish passes. Finally, there tends to be limited information on operational, power loss, and monitoring costs associated with passage measures. Thus, we recommend that policy makers standardize monitoring and reporting of hydraulic, structural, and biological parameters as well as costs in a more detailed manner.

ACS Style

Terese E. Venus; Nicole Smialek; Joachim Pander; Atle Harby; Juergen Geist. Evaluating Cost Trade-Offs between Hydropower and Fish Passage Mitigation. Sustainability 2020, 12, 8520 .

AMA Style

Terese E. Venus, Nicole Smialek, Joachim Pander, Atle Harby, Juergen Geist. Evaluating Cost Trade-Offs between Hydropower and Fish Passage Mitigation. Sustainability. 2020; 12 (20):8520.

Chicago/Turabian Style

Terese E. Venus; Nicole Smialek; Joachim Pander; Atle Harby; Juergen Geist. 2020. "Evaluating Cost Trade-Offs between Hydropower and Fish Passage Mitigation." Sustainability 12, no. 20: 8520.

Articles
Published: 03 July 2019 in Journal of Ecohydraulics
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Increasing awareness of the complexity of river ecosystems has led to the emergence of integrative disciplines that combine topics in river physical and ecological processes, exemplified by the disciplines of ecohydrology, hydroecology and ecohydraulics. However, the names of these disciplines are often referred to interchangeably without attention paid to their meaning. This ambiguity impairs the efficient development and widespread promotion of these fields of study and their applications. To address this issue, we strive to clarify the definitions and contributions of the different disciplines. This is done by exploring their interrelationships and providing a reference for the integration of disciplines in these evolving fields. Finally, we advocate for ecohydrology and ecohydraulics to be considered complementary, and not duplicative, disciplines within river science. We further argue that awareness of their similarities and differences is important to address key issues in river science and to ensure ecohydraulics finds its positioning with respect to other disciplines, as well as current and emerging societal and scientific challenges, such as climate change.

ACS Style

Marie-Pierre Gosselin; Valérie Ouellet; Atle Harby; John Nestler. Advancing ecohydraulics and ecohydrology by clarifying the role of their component interdisciplines. Journal of Ecohydraulics 2019, 4, 172 -187.

AMA Style

Marie-Pierre Gosselin, Valérie Ouellet, Atle Harby, John Nestler. Advancing ecohydraulics and ecohydrology by clarifying the role of their component interdisciplines. Journal of Ecohydraulics. 2019; 4 (2):172-187.

Chicago/Turabian Style

Marie-Pierre Gosselin; Valérie Ouellet; Atle Harby; John Nestler. 2019. "Advancing ecohydraulics and ecohydrology by clarifying the role of their component interdisciplines." Journal of Ecohydraulics 4, no. 2: 172-187.

Journal article
Published: 01 April 2017 in La Houille Blanche
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ACS Style

Atle Harby; Torbjørn Forseth; Tor Haakon Bakken; Audun Ruud. Socio-environmental integration of hydropower facilities. La Houille Blanche 2017, 103, 5 -8.

AMA Style

Atle Harby, Torbjørn Forseth, Tor Haakon Bakken, Audun Ruud. Socio-environmental integration of hydropower facilities. La Houille Blanche. 2017; 103 (2):5-8.

Chicago/Turabian Style

Atle Harby; Torbjørn Forseth; Tor Haakon Bakken; Audun Ruud. 2017. "Socio-environmental integration of hydropower facilities." La Houille Blanche 103, no. 2: 5-8.

Journal article
Published: 16 July 2013 in Journal of Sustainable Development
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Access to sufficient quantities of water of acceptable quality is a basic need for human beings and a pre-requisite to sustain and develop human welfare. In cases of limited availability, the allocation of water between different sectors can result in conflicts of interests. In this study, a modified version of the Building Block Methodology (BBM) was demonstrated for allocation of waters between different sectors. The methodology is a workshop-based tool for assessing water allocation between competing sectors that requires extensive stakeholder involvement. The tool was demonstrated for allocation of water in the Sri Ram Sagar water reservoir in the Godavari Basin, Andhra Pradesh, India. In this multipurpose reservoir, water is used for irrigation, drinking water supply and hydropower production. Possible water allocation regimes were developed under present hydrological conditions (normal and dry years) and under future climate change, characterized by more rain in the rainy season, more frequent droughts in the dry season and accelerated siltation of the reservoir, thus reducing the storage capacity. The feedback from the stakeholders (mainly water managers representing the various sectors) showed that the modified version of the BBM was a practical and useful tool in water allocation, which means that it may be a viable tool for application also elsewhere.

ACS Style

Tor Haakon Bakken; Eva Skarbøvik; A. K. Gosain; K. Palanisami; Julian Sauterleute; Helene Egeland; K. R. Kakumanu; Nagothu Udaya Sekhar; Atle Harby; K. Tirupataiah; Per Stålnacke. Water Allocation With Use of the Building Block Methodology (BBM) in the Godavari Basin, India. Journal of Sustainable Development 2013, 6, 1 .

AMA Style

Tor Haakon Bakken, Eva Skarbøvik, A. K. Gosain, K. Palanisami, Julian Sauterleute, Helene Egeland, K. R. Kakumanu, Nagothu Udaya Sekhar, Atle Harby, K. Tirupataiah, Per Stålnacke. Water Allocation With Use of the Building Block Methodology (BBM) in the Godavari Basin, India. Journal of Sustainable Development. 2013; 6 (8):1.

Chicago/Turabian Style

Tor Haakon Bakken; Eva Skarbøvik; A. K. Gosain; K. Palanisami; Julian Sauterleute; Helene Egeland; K. R. Kakumanu; Nagothu Udaya Sekhar; Atle Harby; K. Tirupataiah; Per Stålnacke. 2013. "Water Allocation With Use of the Building Block Methodology (BBM) in the Godavari Basin, India." Journal of Sustainable Development 6, no. 8: 1.

Journal article
Published: 01 January 2012 in Energy Procedia
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This study has compared the accumulated environmental impacts from 27 small-scale hydropower plants with 3 large hydropower projects. The results show a slight tendency that large hydropower has a lower degree of impacts than many small-scale projects, but lack of precision in the data and weak methodological foundation introduces uncertainty in the results. Taking into account other benefits such as the provision of regulated power, it is reasonable to assume that a few large hydropower projects will produce electricity to a lower environmental cost compared to many small projects, which should be considered when realizing renewable energy policy objectives

ACS Style

Tor Haakon Bakken; Håkon Sundt; Audun Ruud; Atle Harby. Development of Small Versus Large Hydropower in Norway– Comparison of Environmental Impacts. Energy Procedia 2012, 20, 185 -199.

AMA Style

Tor Haakon Bakken, Håkon Sundt, Audun Ruud, Atle Harby. Development of Small Versus Large Hydropower in Norway– Comparison of Environmental Impacts. Energy Procedia. 2012; 20 ():185-199.

Chicago/Turabian Style

Tor Haakon Bakken; Håkon Sundt; Audun Ruud; Atle Harby. 2012. "Development of Small Versus Large Hydropower in Norway– Comparison of Environmental Impacts." Energy Procedia 20, no. : 185-199.

Journal article
Published: 01 June 2007 in River Research and Applications
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ACS Style

Atle Harby. European aquatic modelling network. River Research and Applications 2007, 23, 467 -468.

AMA Style

Atle Harby. European aquatic modelling network. River Research and Applications. 2007; 23 (5):467-468.

Chicago/Turabian Style

Atle Harby. 2007. "European aquatic modelling network." River Research and Applications 23, no. 5: 467-468.

Journal article
Published: 01 June 2007 in River Research and Applications
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At the 8 km bypass section of Chautagne in the Rhône River, most of the flow is diverted due to hydropower production. The environmental flow to the bypass section of the Rhône River was increased from 10 m3 s−1 (winter) and 20 m3 s−1 (summer) to 50 m3 s−1 (winter) and 70 m3 s−1 (summer) in July 2004. A Norwegian mesohabitat method of classifying the river into physical mesoscale morphological (mesohabitat) classes by visual observation was applied at 10 and 70 m3 s−1. The results show that the dominating classes at both flows are deep and low velocity pools, but a higher physical diversity occurs at 70 m3 s−1, quantified by indices from Simpson (1949) and Shannon and Weaver (1962). In total, 6 per cent of the depth measurements and 0.3 per cent of the velocity measurements were outside the expected range at low flow. At high flow, 16.2 per cent of the depth measurements and 19.6 per cent of the velocity measurements were outside the expected range. The change in mesohabitats gives impacts on the composition and abundance of fish and invertebrates. Rheophilic taxa are favoured by the increased flow while more limnophilic species will find less amount of suitable habitat at 70 m3 s−1. Other studies show that population densities of grayling, brown trout, nase and dace have decreased greatly and become endangered since hydropower development, while densities of gudgeon, minnow and stone loach have increased. Fish habitat preferences from Lamouroux et al. (1999a) and Mallet et al. (2000) were used. Most of the endangered species need high velocity mesohabitats and both high and low depths during all life stages. The increase of such mesohabitat proportions at 70 m3 s−1 indicates that their population should recover soon. The method may be a useful tool to compare different flow situations and their impact on the invertebrate and fish population structure even in large rivers. Copyright © 2007 John Wiley & Sons, Ltd.

ACS Style

Atle Harby; Jean-Michel Olivier; Sylvie Mérigoux; Emmanuel Malet. A mesohabitat method used to assess minimum flow changes and impacts on the invertebrate and fish fauna in the Rhône River, France. River Research and Applications 2007, 23, 525 -543.

AMA Style

Atle Harby, Jean-Michel Olivier, Sylvie Mérigoux, Emmanuel Malet. A mesohabitat method used to assess minimum flow changes and impacts on the invertebrate and fish fauna in the Rhône River, France. River Research and Applications. 2007; 23 (5):525-543.

Chicago/Turabian Style

Atle Harby; Jean-Michel Olivier; Sylvie Mérigoux; Emmanuel Malet. 2007. "A mesohabitat method used to assess minimum flow changes and impacts on the invertebrate and fish fauna in the Rhône River, France." River Research and Applications 23, no. 5: 525-543.