100 key questions to guide hydropeaking research

As the share of renewable energy grows worldwide, flexible energy production from peak-operating hydropower and the phenomenon of hydropeaking have received increasing attention. In this study, we collected open research questions from 220 experts in river science, practice, and policy across the globe using an online survey available in six languages related to hydropeaking. We used a systematic method of determining expert consensus (Delphi method) to identify 100 high-priority questions related to the following thematic fields: (a) hydrology, (b) physico-chemical properties of water, (c) river morphology and sediment dynamics, (d) ecology and biology, (e) socio-economic topics, (f) energy markets, (g) policy and regulation, and (h) management and mitigation measures. The consensus list of high-priority questions shall inform and guide researchers in focusing their efforts to foster a better science-policy interface, thereby improving the sustainability of peak-operating hydropower in a variety of settings. We find that there is already a strong understanding of the ecological impact of hydropeaking and efficient mitigation techniques to support sustainable hydropower. Yet, a disconnect remains in its policy and management implementation.publishedVersio

Vann, juss og samfunn

Society’s use and management of water relies on professional expertise spanning diverse fields: from biology and technology to economics and law. This book examines current issues related to regulating water through chapters summarizing various sets of regulation as well as chapters that take a scientific deep dive into selected themes. The diversity of professional expertise is also reflected in the law aspect. We explore such subjects as surface runoff, natural disasters, drinking water, groundwater, salmon, hydropower, and human rights, as well as general impact assessment requirements and duty of knowledge in environmental law administration. A key objective of the book has been to provide an interdisciplinary understanding of the legal circumstances associated with water, and in addition, deliberate the pros and cons of some of the current regulations. This book will be particularly useful for those who in various ways support and facilitate procedures within the public sector at both the national and municipal levels. It will also be useful for private sector actors seeking familiarity with legal questions that can arise in relation to public administration and other private actors. From a broader perspective, we hope the book can help to throw light on conflicts between different interests and groups within society that occur, for example, when introducing fees, special injunctions against private actors, and requirements for knowledge basis. This book project is the result of legal research conducted at the Norwegian University of Life Sciences (NMBU) and is supplemented by national expertise in several areas. It has been edited by Steinar Taubøll, a professor at NMBU’s Department of Property and Law. Taubøll has a background in both law and the natural sciences, and extensive experience with interdisciplinary work.Håndtering og bruk av vann i samfunnet krever et faglig mangfold fra biologi og teknikk til økonomi og juss. Denne boken drøfter aktuelle temaer knyttet til rettslig regulering av vann, både i form av oversiktskapitler om ulike regelsett og gjennom vitenskapelige dypdykk i utvalgte temaer. Den faglige spennvidden gjenspeiler seg også innen det juridiske. I boken finner man stoff om overvannshåndtering, naturfare, drikkevann, grunnvann, villaks, kraftutbygging, menneskerettigheter, samt om generelle utredningskrav og kunnskapsplikter i miljørettsforvaltning. Et sentralt siktemål er å bygge opp tverrfaglig forståelse av gjeldende juridiske forhold knyttet til vann, og dessuten sette noen av dagens reguleringer under debatt. Boken retter seg særlig til de ressurspersonene som på ulike måter støtter saksbehandlingen i stat og kommune. Boken antas også å være nyttig for private aktører som vil gjøre seg mer kjent med rettsspørsmål som kan oppstå i forhold til forvaltningen og til andre private aktører. I et bredere perspektiv er det dessuten ønskelig at boken kan bidra til å belyse konflikter mellom ulike hensyn og grupper i samfunnet, for eksempel ved innføring av gebyrer, pålegg rettet mot private, innføring av tyngende vilkår og krav til kunnskap og faktagrunnlag. Bokprosjektet springer ut av den juridiske forskningen ved Norges miljø- og biovitenskapelige universitet, og har i tillegg knyttet til seg nasjonal spisskompetanse på mange temaer. Bokas redaktør er dosent Steinar Taubøll ved Institutt for eiendom og juss ved NMBU, som har naturfaglig og juridisk utdannelse, samt lang erfaring med tverrfaglig arbeid

Vann, juss og samfunn

Society’s use and management of water relies on professional expertise spanning diverse fields: from biology and technology to economics and law. This book examines current issues related to regulating water through chapters summarizing various sets of regulation as well as chapters that take a scientific deep dive into selected themes. The diversity of professional expertise is also reflected in the law aspect. We explore such subjects as surface runoff, natural disasters, drinking water, groundwater, salmon, hydropower, and human rights, as well as general impact assessment requirements and duty of knowledge in environmental law administration. A key objective of the book has been to provide an interdisciplinary understanding of the legal circumstances associated with water, and in addition, deliberate the pros and cons of some of the current regulations. This book will be particularly useful for those who in various ways support and facilitate procedures within the public sector at both the national and municipal levels. It will also be useful for private sector actors seeking familiarity with legal questions that can arise in relation to public administration and other private actors. From a broader perspective, we hope the book can help to throw light on conflicts between different interests and groups within society that occur, for example, when introducing fees, special injunctions against private actors, and requirements for knowledge basis. This book project is the result of legal research conducted at the Norwegian University of Life Sciences (NMBU) and is supplemented by national expertise in several areas. It has been edited by Steinar Taubøll, a professor at NMBU’s Department of Property and Law. Taubøll has a background in both law and the natural sciences, and extensive experience with interdisciplinary work

Optimalisering av leveområdene for laks ved Sande i Surna, Møre og Romsdal

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Towards an automatic characterization of riverscape development by deep learning

Riverscapes are under pressure from anthropogenic development, and this challengesthe conservation of biodiversity, hydromorphology and land types. To assess changesand restoration potential, an understanding of alteration to rivers overtime is necessary.This can be challenging due to lack of data, shortcomings in methods and data formatsthat are not easily incorporated into the assessment process. Historical aerial imageryexists for rivers prior to modification, but the manual classification is time-consuming.Deep learning is increasingly used in image processing, and here we outline how a con-volutional neural network can be used to automatically classify black and white aerialimagery from the database of the Norwegian mapping authority into habitat types. It isdemonstrated how historical imagery can be used to develop maps that can beprocessed further in a GIS to evaluate natural versus anthropogenic changes over time

Raske vannstandsendringer i elver - Virkninger på fisk, bunndyr og begroing

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Classification of hydropeaking impacts on Atlantic salmon populations in regulated rivers

This article proposes and demonstrates a new classification system of fish population level effects of hydropeaking operations in rivers. The classification of impacts is developed along two axes; first, the hydromorphological effect axis assesses the ecohydraulic alterations in rivers introduced by rapid and frequent variations in flow and water level, second the vulnerability axis assesses the site-specific vulnerability of the fish population. Finally, the population level impact is classified into four classes from small to very large by combining the two axes. The system was tested in four rivers in Norway exposed to hydropeaking, and they displayed a range of outcomes from small to very large impacts on the salmon populations. The river with a relatively high base flow and ramping restrictions scored better than rivers with the lower base flow or limited ramping restrictions, indicating that hydropeaking effects can be mitigated while maintaining high hydropower flexibility. Most effect factors could easily be calculated from timeseries of discharge and water level, whereas the use of hydraulic models to estimate potential stranding areas may require more work. The vulnerability factors are mainly qualitative and depend more heavily on expert judgments and are thus more uncertain. The system was deemed suitable for the purpose of supporting management decisions for rivers exposed to hydropeaking operations. It evaluates the severity of the additional pressures due to hydropeaking operations and proved useful to identify mitigating measures. While the system was developed for Atlantic salmon river systems, it could be adapted to other species or systems

Classification of hydropeaking impacts on Atlantic salmon populations in regulated rivers

This article proposes and demonstrates a new classification system of fish population level effects of hydropeaking operations in rivers. The classification of impacts is developed along two axes; first, the hydromorphological effect axis assesses the ecohydraulic alterations in rivers introduced by rapid and frequent variations in flow and water level, second the vulnerability axis assesses the site-specific vulnerability of the fish population. Finally, the population level impact is classified into four classes from small to very large by combining the two axes. The system was tested in four rivers in Norway exposed to hydropeaking, and they displayed a range of outcomes from small to very large impacts on the salmon populations. The river with a relatively high base flow and ramping restrictions scored better than rivers with the lower base flow or limited ramping restrictions, indicating that hydropeaking effects can be mitigated while maintaining high hydropower flexibility. Most effect factors could easily be calculated from timeseries of discharge and water level, whereas the use of hydraulic models to estimate potential stranding areas may require more work. The vulnerability factors are mainly qualitative and depend more heavily on expert judgments and are thus more uncertain. The system was deemed suitable for the purpose of supporting management decisions for rivers exposed to hydropeaking operations. It evaluates the severity of the additional pressures due to hydropeaking operations and proved useful to identify mitigating measures. While the system was developed for Atlantic salmon river systems, it could be adapted to other species or systems

Classification of hydropeaking impacts on Atlantic salmon populations in regulated rivers

This article proposes and demonstrates a new classification system of fish population level effects of hydropeaking operations in rivers. The classification of impacts is developed along two axes; first, the hydromorphological effect axis assesses the ecohydraulic alterations in rivers introduced by rapid and frequent variations in flow and water level, second the vulnerability axis assesses the site-specific vulnerability of the fish population. Finally, the population level impact is classified into four classes from small to very large by combining the two axes. The system was tested in four rivers in Norway exposed to hydropeaking, and they displayed a range of outcomes from small to very large impacts on the salmon populations. The river with a relatively high base flow and ramping restrictions scored better than rivers with the lower base flow or limited ramping restrictions, indicating that hydropeaking effects can be mitigated while maintaining high hydropower flexibility. Most effect factors could easily be calculated from timeseries of discharge and water level, whereas the use of hydraulic models to estimate potential stranding areas may require more work. The vulnerability factors are mainly qualitative and depend more heavily on expert judgments and are thus more uncertain. The system was deemed suitable for the purpose of supporting management decisions for rivers exposed to hydropeaking operations. It evaluates the severity of the additional pressures due to hydropeaking operations and proved useful to identify mitigating measures. While the system was developed for Atlantic salmon river systems, it could be adapted to other species or systems.publishedVersio