Accounting for flow intermittency in environmental flows design
1. River ecosystems worldwide are affected by altered flow regimes, and an advanced science and practice of environmental flows has developed to understand and reduce these impacts. But most environmental flows approaches ignore flow intermittency, which is a natural feature of 30% of the global riv...
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Online Access: | http://irep.ntu.ac.uk/id/eprint/39342/ http://irep.ntu.ac.uk/id/eprint/39342/1/1299907_a436_Stubbington.pdf https://doi.org/10.1111/1365-2664.13590 |
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ftnottinghtrentu:oai:irep.ntu.ac.uk:39342 2023-05-15T16:08:42+02:00 Accounting for flow intermittency in environmental flows design Acuña, V Jorda‐Capdevila, D Vezza, P De Girolamo, AM McClain, ME Stubbington, R Pastor, AV Lamouroux, N Von Schiller, D Munné, A Datry, T 2020-04 text http://irep.ntu.ac.uk/id/eprint/39342/ http://irep.ntu.ac.uk/id/eprint/39342/1/1299907_a436_Stubbington.pdf https://doi.org/10.1111/1365-2664.13590 en eng Wiley http://irep.ntu.ac.uk/id/eprint/39342/1/1299907_a436_Stubbington.pdf ACUÑA, V., JORDA‐CAPDEVILA, D., VEZZA, P., DE GIROLAMO, A.M., MCCLAIN, M.E., STUBBINGTON, R., PASTOR, A.V., LAMOUROUX, N., VON SCHILLER, D., MUNNÉ, A. and DATRY, T., 2020. Accounting for flow intermittency in environmental flows design. Journal of Applied Ecology, 57 (4), pp. 742-753. ISSN 0021-8901 doi:10.1111/1365-2664.13590 Article PeerReviewed 2020 ftnottinghtrentu https://doi.org/10.1111/1365-2664.13590 2022-01-09T07:14:42Z 1. River ecosystems worldwide are affected by altered flow regimes, and an advanced science and practice of environmental flows has developed to understand and reduce these impacts. But most environmental flows approaches ignore flow intermittency, which is a natural feature of 30% of the global river network length. Ignoring flow intermittency when setting environmental flows in naturally intermittent rivers might lead to deleterious ecological effects. 2. We review evidence of the ecological effects of flow intermittency and provide guidance to incorporate intermittency (non-flow events) into existing methods judged as suitable for application in temporary waterways. 3. To better integrate non-flow events into hydrological methods, we propose a suite of new indicators to be used in the Range of Variability Approach. These indicators reflect dry periods and the unpredictable nature of temporary waterways. We develop a predictability index for protecting those species adapted to temporary conditions. 4. For hydraulic habitat models, we find that mesohabitat methods are particularly effective for describing complex habitat dynamics during dry phases. We present an example of the European eel to show the relationship between discharge and non-flow days and wet area, habitat suitability, and connectivity. 5. We find that existing holistic approaches may be applied to temporary waterways without significant structural alteration to their stepwise frameworks, but new component methods are needed to address flow-related aspects across both flow and non-flow periods of the flow regime. 6. Synthesis and applications. Setting environmental flow requirements for temporary waterways requires modification and enhancement of existing approaches and methodologies, most notably the explicit consideration of non‐flow events and greater integration of specific geomorphic, hydrogeologic, and hydraulic elements. Temporary waterways are among the freshwater ecosystems most vulnerable to alterations in flow regimes, and they are also under great pressure. The methodological modifications recommended in this paper will aid water managers in protecting key components of temporary flow regimes, thereby preserving their unique ecology and associated services. Article in Journal/Newspaper European eel Nottingham Trent University's Institutional Repository (IRep) Journal of Applied Ecology 57 4 742 753 |
institution |
Open Polar |
collection |
Nottingham Trent University's Institutional Repository (IRep) |
op_collection_id |
ftnottinghtrentu |
language |
English |
description |
1. River ecosystems worldwide are affected by altered flow regimes, and an advanced science and practice of environmental flows has developed to understand and reduce these impacts. But most environmental flows approaches ignore flow intermittency, which is a natural feature of 30% of the global river network length. Ignoring flow intermittency when setting environmental flows in naturally intermittent rivers might lead to deleterious ecological effects. 2. We review evidence of the ecological effects of flow intermittency and provide guidance to incorporate intermittency (non-flow events) into existing methods judged as suitable for application in temporary waterways. 3. To better integrate non-flow events into hydrological methods, we propose a suite of new indicators to be used in the Range of Variability Approach. These indicators reflect dry periods and the unpredictable nature of temporary waterways. We develop a predictability index for protecting those species adapted to temporary conditions. 4. For hydraulic habitat models, we find that mesohabitat methods are particularly effective for describing complex habitat dynamics during dry phases. We present an example of the European eel to show the relationship between discharge and non-flow days and wet area, habitat suitability, and connectivity. 5. We find that existing holistic approaches may be applied to temporary waterways without significant structural alteration to their stepwise frameworks, but new component methods are needed to address flow-related aspects across both flow and non-flow periods of the flow regime. 6. Synthesis and applications. Setting environmental flow requirements for temporary waterways requires modification and enhancement of existing approaches and methodologies, most notably the explicit consideration of non‐flow events and greater integration of specific geomorphic, hydrogeologic, and hydraulic elements. Temporary waterways are among the freshwater ecosystems most vulnerable to alterations in flow regimes, and they are also under great pressure. The methodological modifications recommended in this paper will aid water managers in protecting key components of temporary flow regimes, thereby preserving their unique ecology and associated services. |
format |
Article in Journal/Newspaper |
author |
Acuña, V Jorda‐Capdevila, D Vezza, P De Girolamo, AM McClain, ME Stubbington, R Pastor, AV Lamouroux, N Von Schiller, D Munné, A Datry, T |
spellingShingle |
Acuña, V Jorda‐Capdevila, D Vezza, P De Girolamo, AM McClain, ME Stubbington, R Pastor, AV Lamouroux, N Von Schiller, D Munné, A Datry, T Accounting for flow intermittency in environmental flows design |
author_facet |
Acuña, V Jorda‐Capdevila, D Vezza, P De Girolamo, AM McClain, ME Stubbington, R Pastor, AV Lamouroux, N Von Schiller, D Munné, A Datry, T |
author_sort |
Acuña, V |
title |
Accounting for flow intermittency in environmental flows design |
title_short |
Accounting for flow intermittency in environmental flows design |
title_full |
Accounting for flow intermittency in environmental flows design |
title_fullStr |
Accounting for flow intermittency in environmental flows design |
title_full_unstemmed |
Accounting for flow intermittency in environmental flows design |
title_sort |
accounting for flow intermittency in environmental flows design |
publisher |
Wiley |
publishDate |
2020 |
url |
http://irep.ntu.ac.uk/id/eprint/39342/ http://irep.ntu.ac.uk/id/eprint/39342/1/1299907_a436_Stubbington.pdf https://doi.org/10.1111/1365-2664.13590 |
genre |
European eel |
genre_facet |
European eel |
op_relation |
http://irep.ntu.ac.uk/id/eprint/39342/1/1299907_a436_Stubbington.pdf ACUÑA, V., JORDA‐CAPDEVILA, D., VEZZA, P., DE GIROLAMO, A.M., MCCLAIN, M.E., STUBBINGTON, R., PASTOR, A.V., LAMOUROUX, N., VON SCHILLER, D., MUNNÉ, A. and DATRY, T., 2020. Accounting for flow intermittency in environmental flows design. Journal of Applied Ecology, 57 (4), pp. 742-753. ISSN 0021-8901 doi:10.1111/1365-2664.13590 |
op_doi |
https://doi.org/10.1111/1365-2664.13590 |
container_title |
Journal of Applied Ecology |
container_volume |
57 |
container_issue |
4 |
container_start_page |
742 |
op_container_end_page |
753 |
_version_ |
1766404717634650112 |