The Effect of Large Wood Accumulations With Rootwads on Local Geomorphic Changes

Ravazzolo, Diego; Spreitzer, Gabriel; Tunnicliffe, Jon; Friedrich, Heide

doi:10.1029/2021wr031403

Cited by 9 publications

(7 citation statements)

References 62 publications

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“…Accordingly, smaller LW pieces were transported the furthest within the same period of time and stream section [45,98]. LW is also likely to be transported at the rising limb of floods and following the thalweg of the channel [16,48,68], while the presence of rootwad and branches was shown to significantly affect LW mobilisation and orientation, due to anchoring effects [2,69].…”

Section: Brief History Of Lw Trackingmentioning

confidence: 99%

SmartWood: field-based analysis of large wood movement dynamics using inertial measurement units (IMUs)

Spreitzer,

Schalko,

Boes

et al. 2024

Environ Sci Eur

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Wood plays an important ecological role in rivers. Yet challenges arise when large wood (LW) is mobilised and transported during floods. Due to a lack of quantitative data, movement behaviour of LW during floods is still not well understood to date. A proof-of-concept study was conducted at three Swiss rivers to test state-of-the-art sensor-tagged logs, so-called “SmartWood” and collect quantitative field-scale data about LW movement behaviour. The experiments utilised innovative inertial measurement units (IMUs), which have been developed at the Laboratory of Hydraulics, Hydrology and Glaciology (VAW) at ETH Zurich and implanted into wood logs (SmartWood) at prototype scale. Each IMU comprised three individual sensors (gyroscope, accelerometer, and magnetometer) and was equipped with an on-board processor, an AA battery (4.35 V), a memory (8 MB), and a Wi-Fi transmitter (100 m) for data transfer. After successful initial verification tests of the sensors, the IMUs were installed into debranched wood logs, measuring 4.35 m in length and 0.33 m in diameter. At the time of the field experiments, each SmartWood-log weighted between 170 and 220 kg, yielding a density of roughly 500 kg∙m−3. At the Limmat, Thur, and Grosse Melchaa Rivers in Switzerland, innovative yet discontinuous data were obtained. Results revealed consistent movement dynamics across all field sites. Specifically, we observed positive yaw movement during transport of SmartWood along the left river bank and negative yaw movement along the right river bank. Furthermore, interactions of SmartWood with channel boundaries, riparian vegetation, and objects (e.g., ferry dock) were registered and quantified, even when the SmartWood-log was transported out of sight of traditional sensing methods. The conducted field experiments enabled the initial testing of SmartWood in the field and exposed critical limitations of the IMUs and software algorithms for the reconstruction and analysis of floating LW dynamics. The gained knowledge and introduced sensing method will benefit the quantitative assessment of LW dynamics in rivers to maintain safety and functionality for instream structures (e.g., considering LW movement dynamics for the robust design of LW retention and guiding structures), but also river restoration projects and numerical models that rely on quantitative field-scale data.

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Section: Brief History Of Lw Trackingmentioning

confidence: 99%

SmartWood: field-based analysis of large wood movement dynamics using inertial measurement units (IMUs)

Spreitzer,

Schalko,

Boes

et al. 2024

Environ Sci Eur

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“…These studies shed light on the bridges' clogging process and resulted in empirical formulations to estimate blockage probabilities. Recently, complex flume geometries have been used, and the interactions between the flow, sediment, vegetation and wood have been explored (e.g., Mao et al, 2020; Ravazzolo et al, 2022; Schalko et al, 2019; Spreitzer et al, 2021; Welber et al, 2013).…”

Section: Monitoring Tracking and Modelling Wood Transportmentioning

confidence: 99%

Current progress in quantifying and monitoring instream large wood supply and transfer in rivers

Ruiz‐Villanueva,

Aarnink,

Ghaffarian

et al. 2024

Earth Surf Processes Landf

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Large wood drives both the form and function of gravel‐bed rivers draining forested basins. Previously overlooked benefits of wood in rivers are now widely recognized. Together with flow and sediment regimes, the wood regime controls rivers' physical and ecological integrity. Yet large quantities of wood transported during floods can pose additional hazards, potentially damaging infrastructures like bridges or dams and exacerbating flooding. However, unlike the water and sediment regimes intensively studied over the past decades, the instream wood regime or budgeting has been only recently defined and thus is still rarely quantified. The instream wood budget describes the cascading processes from supply or recruitment, entrainment, and transport to deposition, storage and decay (i.e., fragmentation or decomposition). These processes show high spatial and temporal variability but can be characterized by magnitude, frequency, timing, duration and mode. Instream wood budgeting is challenging, primarily because of the lack of observations, monitoring stations, and standardized protocols to acquire data. This contribution reviews the most recent advances to quantify the different instream wood budget components, notably the wood supply, and transfer. Case studies showing applications of biogeochemistry, videography, artificial intelligence, numerical modelling or tracking illustrate the current progress. Because critical challenges remain, we identify and describe some of them and discuss how the wood in riverine sciences may develop in the future.

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“…Large wood and river morphology Braudrick and Grant (2001), Welber et al (2013), Bertoldi et al (2014bBertoldi et al ( , 2015, Mao et al (2020), Ravazzolo et al (2022).…”

Section: Large Woodmentioning

confidence: 99%

Plants and river morphodynamics: The emergence of fluvial biogeomorphology

Gurnell,

Bertoldi

2024

River Research & Apps

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In this article, we track the evolution of fluvial biogeomorphology from the middle of the 20th century to the present. We consider the emergence of fluvial biogeomorphology as an interdisciplinary research area that integrates knowledge drawn primarily from fluvial geomorphology and plant ecology, but with inputs from hydrology and landscape ecology. We start by assembling evidence for the emergence of the field of fluvial biogeomorphology with a keyword search of the Web of Science and a detailed analysis of papers published in two scientific journals: a geomorphology journal—Earth Surface Processes and Landforms; a multidisciplinary river science journal—River Research and Applications. Based on this evidence, we identify three distinct time periods in the development of fluvial biogeomorphology: the ‘early years’ before 1990; the transitional decade of the 1990s; and the period of rapid expansion and diversification in themes, methods and investigation scales since 2000. Because the literature is vast, we can only summarize developments in each of these time periods, but we refer to recent in‐depth reviews and conceptual perspectives on relevant topics. Thus, rather than a full and deep review, we present an annotated bibliographic overview of the development of fluvial biogeomorphology, whereby the text describes broad trends but is supported by tables of citations that can deliver greater detail. We end with a brief consideration of likely future developments.

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The Effect of Large Wood Accumulations With Rootwads on Local Geomorphic Changes

Cited by 9 publications

References 62 publications

SmartWood: field-based analysis of large wood movement dynamics using inertial measurement units (IMUs)

SmartWood: field-based analysis of large wood movement dynamics using inertial measurement units (IMUs)

Current progress in quantifying and monitoring instream large wood supply and transfer in rivers

Plants and river morphodynamics: The emergence of fluvial biogeomorphology

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