Evidence map›Paper›PMID 34887399›Full record

ArticleNature communications2021

Vanishing weekly hydropeaking cycles in American and Canadian rivers.

Stephen J Déry, Marco A Hernández-Henríquez, Tricia A Stadnyk, Tara J Troy

Abstract read
In one paragraph

Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Stephen J DéryDepartment of Geography, Earth and Environmental Sciences, University of Northern British Columbia, 3333 University Way, Prince George, BC, V2N 4Z9, Canada. sdery@unbc.ca.ORCID http://orcid.org/0000-0002-3553-8949
Marco A Hernández-HenríquezDepartment of Geography, Earth and Environmental Sciences, University of Northern British Columbia, 3333 University Way, Prince George, BC, V2N 4Z9, Canada.ORCID http://orcid.org/0000-0001-7521-3674
Tricia A StadnykDepartment of Geography, University of Calgary, Calgary, AB, T2N 1N4, Canada.ORCID http://orcid.org/0000-0002-2145-4963
Tara J TroyDepartment of Civil Engineering, University of Victoria, Victoria, BC, V8W 2Y2, Canada.ORCID http://orcid.org/0000-0001-5366-0633

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Sub-daily and weekly flow cycles termed 'hydropeaking' are common features in regulated rivers worldwide. Weekly flow periodicity arises from fluctuating electricity demand and production tied to socioeconomic activity, typically with higher consumption during weekdays followed by reductions on weekends. Here, we propose a weekly hydropeaking index to quantify the 1920-2019 intensity and prevalence of weekly hydropeaking cycles at 500 sites across the United States of America and Canada. A robust weekly hydropeaking signal exists at 1.8% of sites starting in 1920, peaking at 18.9% in 1963, and diminishing to 3.1% in 2019, marking a 21st century decline in weekly hydropeaking intensity. We propose this decline may be tied to recent, above-average precipitation, socioeconomic shifts, alternative energy production, and legislative and policy changes impacting water management in regulated systems. Vanishing weekly hydropeaking cycles may offset some of the prior deleterious ecohydrological impacts from hydropeaking in highly regulated rivers.

Identifiers

PMID34887399
PMCPMC8660798

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.