Flow interactions with an aquatic macrophyte: a field study using stereoscopic particle image velocimetry

Biggs, Hamish; Nikora, Vladimir; Gibbins, Christopher; Cameron, Stuart; Papadopoulos, K.; Stewart, Mark T.; Fraser, Shaun; Vettori, Davide; Savio, Mario; O’Hare, Matthew T.; Kucher, Michael; Hicks, D. Murray

doi:10.1080/24705357.2019.1606677

Cited by 23 publications

(20 citation statements)

References 43 publications

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“…Larvae of a few millimetres in length are experiencing and responding to flow hydraulics at very small scales. Characterizing habitat at this organism scale has long been a major challenge, although technological and methodological developments are permitting progressively finer scale characterization (Buffin‐Bélanger, Rice, Reid, & Lancaster, ; Johnson & Rice, ), including measurement devices once constrained to laboratory settings now being deployed in the field (Biggs et al, ). Thus, the gap between the observational scales possible and the fine scale at which plants and animals experience flow is becoming smaller.…”

Section: Discussionmentioning

confidence: 99%

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Influence of habitat heterogeneity and bed surface complexity on benthic invertebrate diversity in a gravel‐bed river

Béjar

Gibbins

Vericat

et al. 2020

River Research & Apps

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Maintaining or restoring physical habitat diversity is a central tenet of sustainable river management, yet a link between habitat and ecological diversity in fluvial systems has long remained equivocal. The lack of consistent evidence partly reflects the problems of characterizing habitat in ways that are ecologically meaningful. This paper assesses the influence of habitat heterogeneity and complexity on macroinvertebrate assemblages in a mountain gravel‐bed river. With the use of 0.1‐m resolution data obtained from an acoustic Doppler current profiler, heterogeneity and complexity in hydraulic conditions and bed topography were characterized using 13 metrics applied to 30 areas, each 1 m2, with an invertebrate sample collected from each area. Turnover of invertebrate taxa (i.e., β‐diversity) between sampled areas was rather limited, but observed differences in diversity were related significantly to several metrics of habitat heterogeneity. Invertebrate abundance was related to habitat diversity, patch size coefficient of variation, and patch size, whereas the Shannon diversity was related to the number of patches and patch size. None of the habitat complexity metrics accounted for a significant amount of observed variation in invertebrate communities between sampled areas. The paper demonstrates that high‐resolution data can help reveal relationships between habitat and benthic invertebrate diversity.

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Section: Discussionmentioning

confidence: 99%

“…Rice, 2014), including measurement devices once constrained to laboratory settings now being deployed in the field(Biggs et al, 2019). Thus, the gap between the observational scales possible and the fine scale at which plants and animals experience flow is becoming smaller.…”

mentioning

confidence: 99%

Influence of habitat heterogeneity and bed surface complexity on benthic invertebrate diversity in a gravel‐bed river

Béjar

Gibbins

Vericat

et al. 2020

River Research & Apps

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“…Sedimentation around aquatic vegetation occurs due to increased residence time for water compared to the free stream (Schulz et al, 2003) and decreased resuspension of sediment, due to reduced stresses (Vargas‐Luna et al, 2015). With deposition a function of aquatic vegetation length (Licci et al, 2019), width, area, volume, porosity, flexibility, spatial distribution and proximity to the bed (Biggs et al, 2019). The presence of aquatic vegetation frequently results in preferential deposition of fine sediments under plant canopies (Bennett et al, 2002; Jones et al, 2012; Wharton et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Interactions between aquatic vegetation, hydraulics and fine sediment: A case study in the Halswell River, New Zealand

Biggs

Haddadchi

Hicks

2021

Hydrological Processes

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This paper contributes a field study of suspended sediment transport through aquatic vegetation. The study was run over a 3 month period which was selected to coincide with scheduled weed cutting activities. This provided the opportunity to obtain data points with no vegetation cover, as well as to investigate the effects of weed cutting on Suspended Sediment Concentrations (SSC), particle size distributions and river hydraulics. Aquatic vegetation cover was quantified through remote sensing with Unmanned Aerial Vehicles and biomass estimated from ground truth sampling. SSC was highly dependent on aquatic vegetation abundance, and the distance upstream that had been cleared of aquatic vegetation. The data indicates that fine sediment was being trapped and stored by aquatic vegetation, then likely remobilised after vegetation removal. Investigation of suspended sediment spatial dynamics illustrated changes in particle size distribution due to preferential settling of coarse particles within aquatic vegetation, for example D50 decreased from 36.08 μm to 15.64 μm after suspended sediment travelled 304.2 m downstream and passed ~3700 kg of aquatic vegetation biomass. Hydraulic resistance in the study reach (parameterized by Manning's n) dropped by over 70% following vegetation cutting. Prior to cutting hydraulic resistance was discharge dependent (likely due to vegetation pronating at higher flows), while post cutting hydraulic resistance was approximately invariant of discharge. Aerial surveying captured interesting changes in aquatic vegetation cover prior to vegetation cutting, where some very dense regions of aquatic vegetation were naturally removed (without any high flow events) leaving behind unvegetated riverbed and fine sediment. The weed cutting boat had a lower impact on SSC than was originally expected, which indicates that it may offer a less damaging solution to aquatic vegetation removal in rivers than some other approaches such as mechanical excavation. This paper contributes valuable field data (which are generally scarce) on the research topic of flow‐vegetation‐sediment interactions, to supplement laboratory and numerical studies.

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“…Environmental flow assessment, including effects from climate change in rivers (Morid et al 2019) and protection of biodiversity and endemic species in a spring-fed urbanized stream (De-Miguel-Gallo et al 2019) Long-term changes in riparian vegetation cover at pre-and post-dam construction phases (Nallaperuma and Asaeda, 2019) Better understanding of flow interactions with aquatic macrophytes using a high-resolution stereoscopic PIV field measurement system (Biggs et al 2019) Use of remote sensing for dispersion studies in river channels, including potential for dispersion of larvae (Legleiter et al 2019) Historical synthesis on the use of fishways in China, their monitoring and performance challenges, as well as recent renewed interest in effective fish passage (Liu et al 2019) Review of ecohydraulics and ecohydrology as integrative disciplines and their complementary roles in river science (Gosselin et al 2019)…”

Section: International Contributions In Advancing Ecohydraulicsmentioning

confidence: 99%

International contributions in advancing ecohydraulics

Fukuda

Tanaka

Yasuda

et al. 2019

Journal of Ecohydraulics

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Flow interactions with an aquatic macrophyte: a field study using stereoscopic particle image velocimetry

Abstract: There may be differences between the Accepted Manuscript and the final publisher's version. You are advised to consult the publisher's version if you wish to cite from this article.

Cited by 23 publications

References 43 publications

Influence of habitat heterogeneity and bed surface complexity on benthic invertebrate diversity in a gravel‐bed river

Influence of habitat heterogeneity and bed surface complexity on benthic invertebrate diversity in a gravel‐bed river

Interactions between aquatic vegetation, hydraulics and fine sediment: A case study in the Halswell River, New Zealand

International contributions in advancing ecohydraulics

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