New field data are reported for overbank sedimentation generated by the extreme flood event of summer 2021 along the Maas River, an intensively managed lowland river in the Netherlands. Flood duration was short (3-4 days) but flood magnitude was extreme, the highest stage and discharge (3,2650 m^3/s) recorded in more than 100 years.

Flood sediments were sampled at 108 sites from the NL-BE border to the delta (195-km distance) over a range of depositional environments, including artificial flood basins created for the Room for the River flood management program. Flood deposits were sampled in August and September using conventional field sampling procedures, which included identifying recent sediment deposited atop buried soil and organic layers using field texture and density, and differences in soil color (recorded). The modal Munsell soil color value for flood deposits and the darker underlying soil were brown (2.5 Y 3/2) and light olive brown (2.5 Y 5/3), respectively. Sedimentation thickness (mm) of each of the 108 reported values is an average of three individual thickness measurements obtained within a ~0.5 m radius at each field site. Minimum flood water height was measured by identifying silt and trash lines in vegetation and fencing at multiple locations and ranged from 3.5-m to 0.3-m above low and high floodplain surfaces, respectively. Particle size of 84 flood sediment samples was determined by hydrometer analysis and wet sieving.

Average flood deposit thickness was 21 mm, and varied significantly according to geomorphic setting: low floodplains (28 mm), high floodplains (6 mm), channel banks (31 mm), inset banks (11 mm), and flood basins (42 mm). Maximum sedimentation was associated with discreet sand sheets (295 mm). Floodplain stripping (erosion) at some low floodplain sites included reworking and deposition of large clasts (gravel, cobble). Pronounced lateral decreases in sedimentation thickness persists despite flood water height, and rapidly declines beyond about ~30 m from the channel bank. Lateral changes in particle size, however, are less abrupt, and along some reaches very fine sand was deposited to the distal margins of the embanked floodplain. Some laterally distant sites > ~200 m from the channel bank underwent high amounts of sedimentation (38 mm, 25 mm, 43 mm) with pronounced vertical fining (very fine sand to silt) of flood deposits associated with slackwater sedimentation within basins engineered for the Room for the River flood management program. In contrast to many prior sedimentation studies a pattern of downstream fining (along same geomorphic surface) does not exist, likely due to high stream power and reworking of older channel bed deposits.

The overall thickness of the 2021 flood deposits are considerably less than reported for large flood events in 1993 and 1995. This may be due to the shorter duration of the 2021 flood event, as well as the persistent decline in Maas River sediment loads since about the early 1950s, as well as differences in sampling strategy. Study results are further contextualized by considering corresponding event-based discharge – suspended sediment dynamics as well as sediment province.

How to cite: Hudson, P.: Sedimentation from an extreme event along an intensively managed fluvial system: Summer 2021 flooding along the Maas River, Netherlands, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-8326, https://doi.org/10.5194/egusphere-egu22-8326, 2022.

Longitudinal dams (LD) are novel engineering structures built parallel to the river channel that support sustainable river management. The recent replacement of groynes by longitudinal dams in low-land rivers such as the Waal has been successful in restoring the ecological river functions while simultaneously achieving its navigation, recreation, and flood-protection functions. However, the impact of the LD on the riverbanks is still unknown despite recent investigations on the flow dynamics in the side channel behind it. We fill this knowledge gap by investigating initial bank responses and quantifying changes in sediment dynamics over five years since the completion of the LD in the Waal at Wamel. We rely on available annual high-resolution LiDAR-derived DTMs, orthophotos, and in situ measurements to estimate erosion and deposition rates and their changes over the study period. A two-stage initial response is revealed with the largest bank erosion (~140 x 10³ m³/yr) and deposition (~20 x 10³ m³/yr) confined in the first year after installation, as the banks adjust to a new hydrogeomorphic equilibrium. This is followed by successively lower rates of surface-level changes (<70 x $10³ m³/yr eroded and <10 x 10³ m³/yr deposited) as a response to the hydrogeomorphic dynamics in the new system. The overbank deposits from recent floods have a similar distribution with those prior to LD construction based on the DTMs. However, higher volumes of sandy deposits are found post- compared to pre-LD construction for floods of similar magnitude and duration. This increase is caused by the additional contribution of the bank sediments that have been made available through the removal of groynes. Although eroding banks may be a threat to infrastructure and navigability, they have a positive effect on restoring ecological diversity and floodplain connectivity.

How to cite: Carranza, C., Onderwater, N., Larsen, A., Candel, J., Bense, V., Hoitink, T., Wallinga, J., and van der Ploeg, M.: Releasing the banks: initial morphological responses after removal of groynes and installation of a longitudinal dam, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-3566, https://doi.org/10.5194/egusphere-egu22-3566, 2022.

Dam removals are currently experiencing a hype as a measure to restore water bodies to a more natural and thus more resilient state. Following the implementation of major projects in North America and some EU countries in particular, an inventory regarding planned and implemented projects has been carried out in Austria for the first time. A total of 53 cross barriers are known to have been removed to date. The characteristics and also problems in the definition of these projects will be presented.

The second part will deal with the challenges in the practical implementation of such measures. Case studies on the Maltsch and the Aschach show which resistances of the local population, hydraulic considerations and practical implementation risks are to be expected.

Finally, the significance of such measures will be evaluated in the overall consideration of river restoration measures and solutions in terms of climate change adaptation.

How to cite: Höfler, S., Pilz, I., and Gumpinger, C.: Dam Removal in Austria – Current status, lessons learned from implementation, and potential contribution of the measure in climate change adaptation, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-13254, https://doi.org/10.5194/egusphere-egu22-13254, 2022.

Understanding the possible geomorphic trajectory of rivers on the scale of decades is crucial for a successful design of river restoration interventions, especially in the contest of a changing climate. In this contribution we focus on river alternate bars, large bedforms that appear as a repeating sequence of diagonal depositional fronts and scour holes. Downstream-migrating alternate bars can spontaneously form due to a well-known process of riverbed instability and are frequently found in channelized river reaches. We considered two study reaches of the Alpine Rhine River in Switzerland, characterized by similar hydrological and sedimentological characteristics, but different channel width. Expected hydrological changes until 2100, depending on the Representative Concentration Pathways for greenhouse gases, were evaluated by considering the recents projections from the Hydro-CH2018 project. The bar evolution was reproduced through the novel mathematical model developed by Carlin et al. (2021), which allows for simulating the temporal variability of the reach-averaged bar height in the long-term. Model’s results clearly show that the expected response of the river bed strongly depends on channel conditions with respect to the relevant morphodynamics threshold for bar formation. The first reach, which is sufficiently wide to allow for a full development of migrating alternate bars, turns out to be weakly sensitive to the projected hydrological alterations. Conversely the second, narrower reach, which is currently close to the threshold conditions, is expected to experience a remarkable alteration in bar dynamics. Specifically, the average bar height is expected to significantly increase, while its variability during flood events will probably drastically reduce. Ultimately, this work reveals a noteworthy example of a more general property of near-threshold geomorphic systems, which are potentially fragile and highly susceptible to changes of their hydrological and ecological conditions, in contrast to systems that being far from threshold conditions are more likely to maintain their physical characteristics in the long term.

How to cite: Redolfi, M., Carlin, M., and Tubino, M.: The geomorphic response of river alternate bars to climate change, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-11359, https://doi.org/10.5194/egusphere-egu22-11359, 2022.

River restoration is essential to reverse biodiversity decline and improve river resilience to climate change. In northern Sweden, virtually all rivers were historically timber-floated and thus channelized with all complexity elements (e.g., boulders, islands, side channels) removed. In these rivers restoration design is determined in the field by a team leader directing an excavator driver. This efficient methods allows restoration of 100s of river kilometers annually; however, there is little to no monitoring of restoration outcomes. Thus, the influence of restoration on channel morphology and habitat complexity is unknown. Furthermore, response of semi-alluvial rivers constrained by glacial legacy sediment (e.g., boulders) to restoration is poorly understood and expected to differ from their alluvial counterparts. In this study, we followed up eight reaches in the Lögde River catchment (~64° N, DA: ~1600 km²) restored as part of the EU LIFE project ReBorN. Reaches were equally divided above and below the former-highest coastline (FHC), demarcating different glacial histories and surficial geologies (semi-alluvial vs. alluvial channels). To evaluate the influence of river size on channel response to restoration, half of the reaches were located on tributaries and half of the reaches were on the mainstem of the Lögde River. We surveyed all reaches with a total station or RTK-GPS prior to restoration and 1-year and 3-years post-restoration. Hydromorphologic characteristics and complexity metrics were calculated and compared among years to determine changes during and post-restoration.

As expected due to the nature of the restoration methods, channel size increased, with significant increases in channel width and planform area. Although channel complexity showed increasing trends, few were significant except three metrics describing the longitudinal profile (α= 0.10); one complexity metric showed a significant decrease (thalweg planform sinuosity). In the 3-year period following restoration, channel width, planform area, and depth decreased. Complexity metrics either showed no change or a similar trend of decreasing, with significant decreases in three metrics (width SD, thalweg concavity, and thalweg R²). There were no significant differences between reaches above and below the FHC or between the mainstem and tributaries.

Overall, these reaches were over-dimensioned during restoration and post-restoration adjustment shows slight narrowing. Inset bankfull channels started forming with vegetation establishing below the designed bankfull channel. An over-dimensioned channel reduces overbank flooding and thus lateral channel-floodplain connectivity, negating a restoration design aim. The decreased post-restoration complexity indicates a smoothening of the longitudinal profile and planform bankfull profile through sediment settling and preferred areas of erosion/deposition, rather than the artificial complexity created by the excavator. Although eight reaches were too few to reveal many significant changes, many post-restoration studies make conclusions based on a single reach, thus the trends shown here indicate similar processes acting across several reaches. Similarly, three years is a short time period to evaluate post-restoration channel adjustment, particularly in semi-alluvial boulder-bed rivers. Ideally, river restoration should be followed up for at least a decade, allowing the river to experience high flows and potentially varied winter ice conditions.

How to cite: Polvi, L. E. and Mason, R. J.: Adjustment of channel morphology and complexity following restoration of timber-floated rivers, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-9081, https://doi.org/10.5194/egusphere-egu22-9081, 2022.

Gravel augmentation has become common practice to mitigate the effects of decline in upstream sediment supply in gravel-bed rivers. However, functional aspects of river systems such as thermal functions are often left out of rehabilitation monitoring programmes. Despite temperature being a fundamental parameter determining the general health of rivers, a limited number of studies have tested whether gravel augmentation can aid restoring thermal functions. Using airborne thermal infrared (TIR) imagery, this paper explores potential feedbacks through the monitoring of gravel augmentation on 3 rivers in France. To overcome the lack of pre-rehabilitation data, we used hydromorphological indicators within a trajectory-based Before-After-Control-Impact (BACI) framework to assess the success of rehabilitation on thermal functions. This design, combining long-term geomorphic evolution with TIR-based CI strategy, indicated that restoring forms was not sufficient to restore thermal functions. Nonetheless, hydromorphological indices mesures on historical aerial photographs can be used to estimate long-term evolution of groundwater-surface water interactions. We emphasise the benefits of trajectory-based BACI assessment to identify current conditions, understand the past evolution (trajectory) of the system to define the framework within which rehabilitation can objectively be assessed.

How to cite: Marteau, B., Michel, K., and Piégay, H.: Assessing the effects of gravel augmentation on thermal processes in gravel-bed rivers, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-7845, https://doi.org/10.5194/egusphere-egu22-7845, 2022.

A river corridor includes the active channel(s), floodplain, and underlying hyporheic zone. Geomorphic heterogeneity refers to the spatial distribution of geomorphic units within the river corridor. Heterogeneity can be conceptualized at different spatial scales, from bedforms such as pools and riffles in the active channel, to the distribution of subsurface paleochannels across the entire floodplain. Essentially, geomorphic heterogeneity describes the extent to which the river corridor is spatially non-uniform in the three dimensions of vertical, lateral, and longitudinal. Heterogeneity results from erosion and deposition caused by temporal and spatial variations in both inputs and boundary resistance, as well as modifications created by biota such as riparian vegetation or beavers (Castor spp.). In many river corridors, these variations and biotic influences reduce longitudinal connectivity but enhance lateral and vertical connectivity within the river corridor. Resilience is the ability to absorb disturbances without diminishing or changing river corridor function. Resilience can be conceptualized as occurring along a continuum dependent on time and space scales, especially when applied to a system such as a river corridor that includes individual components with different levels of resilience. Changing climate will affect averages and extremes such as floods and wildfires. I use case studies from mountain streams in Colorado, USA to illustrate how a geomorphically heterogeneous river corridor is more resilient to extremes of high and low flow and large inputs of either sediment or solutes. Geomorphic heterogeneity promotes resilience because the spatial non-uniformity of the river corridor provides more opportunities for transient storage over diverse timespans, which attenuates downstream fluxes, and diffuses the energy inputs resulting from a disturbance.

How to cite: Wohl, E.: Geomorphic Heterogeneity in River Corridors as a Source of Resilience to Changing Climate, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-1552, https://doi.org/10.5194/egusphere-egu22-1552, 2022.

How to cite: Aarnink, J., Ruiz-Villanueva, V., and Vuaridel, M.: Machine learning and RFID-based large wood tracking in rivers , EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-3974, https://doi.org/10.5194/egusphere-egu22-3974, 2022.

Large wood (LW), both as individual pieces and in accumulations (WJ), plays an important role in the morphology, hydrology, and ecology of rivers. However, LW dynamics in rivers affected by volcanic eruptions has been little studied. This study aims to investigate the changes of LW volumes along a segment of the Blanco-Este River (southern Chile) affected by the 2015 Calbuco volcanic eruption. The following research questions were addressed: a) what are the drivers that explain the spatial and temporal variability of the amount of LW along the river active channel? b) what is the level of connection between the potential source areas of wood and the channel? c) is it possible to infer a relationship between recruitment sources and floods, with fluctuations in the amount of wood along the channel? The study was conducted in two reaches, the upstream one more proximal to the volcano (hereinafter R1) and the downstream more distal from the volcano (R2). LW and WJ volume were calculated using the structure from motion (SfM) technique for several sampling campaigns performed between 2017 and 2020 using a drone. Data from a fluviometric station near the Blanco-Este River and time lapse camera records were used to interpret the dynamics of wood during floods. Finally, the stability of WJs was used to indirectly evaluate the mobility of LW in the study reaches. Results show that the amount of LW (n°/ha), WJ (n°/ha) and total wood volume (m³/ha) are considerably higher in R2 than in R1. In both reaches, the main recruitment source of LW to the channel is associated with erosions of the forested margins, but for R2 a tributary and erosions of old laharic deposits are also recruitment sources. LW volume in R1 did not vary much between campaigns (1.9-5.1 m³/ha) which would indicate that this reach is in an equilibrium condition of LW loading. Since the wood volume in R2 showed important variations between sampling campaigns (9.1-73.9 m³/ha), this reach does not seem to have reached this equilibrium condition yet. Results showed that there is no clear relationship between the wood fluctuations and the flood intensities (volume increases and decreases indistinctly associated to low or high peak flows), a fact confirmed from the time lapse cameras. However, wood supply appears, as might be expected, somehow controlled by floods, as well as wood transport. But, apparently, the floods competent to move logs are of lower magnitude than those generating bank erosions and subsequent wood recruitment. From the analyses of the drone images, it was observed that the stability of the WJs was very low in the Blanco-Este, which indicates a high LW mobility. A connection between the areas that supply LW to the river channel appears to occur during major flood events with sufficient competence to erode forested streambanks. The latter calls for the need to incorporate the analysis of longitudinal wood connectivity in channel studies. This study is part of the FONDECYT 1200079 project.

How to cite: Iroumé, A., Sanchez, K., Martini, L., Pellegrini, G., and Picco, L.: Impact of a volcanic eruption on the wood fluctuation along a Chilean river basin: the Calbuco study case , EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-4251, https://doi.org/10.5194/egusphere-egu22-4251, 2022.

Engineered logjams with a gap at the bed are used in engineering practice to provide natural flood management and ecological benefits while preserving river connectivity at base flow. In addition, logjams with a gap at the bed form naturally in small streams with river width less than log length. The accumulation of wood pieces acts as a porous obstruction, and the distribution of flow through and beneath a jam with a lower gap satisfies a two-box, momentum-based model constrained by drag generated in the jam, momentum loss in flow through the lower gap, and net pressure force. Accumulation of brush and fine material upstream of logjams occurs naturally as small wood pieces and leaves are transported to the river channel. However, the impact of accumulated upstream material on logjam-generated increase in backwater rise presents a potential concern for long term maintenance of engineered logjam projects. We present recent results demonstrating that initial accumulation of wood pieces upstream of a jam with a lower gap has little impact on backwater rise, but backwater rise increased during a simulated flood cycle as wood pieces blocked the lower gap. The effect of varying brush size and shape and impact on flow redistribution between the jam and gap is examined.

How to cite: Follett, E., Schalko, I., and Nepf, H.: Flow redistribution and backwater rise due to brush accumulation upstream of logjams with a lower gap, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-5495, https://doi.org/10.5194/egusphere-egu22-5495, 2022.

Wood is a key part of a river ecosystem and affects both flow conditions and channel morphology. Wood accumulations or logjams may generate important habitat by increasing the upstream water surface elevation (backwater rise) and creating a downstream region with reduced flow velocity. Depending on the logjam size and the flow conditions, the resulting backwater rise can also provoke a flood hazard. Therefore, the prediction of backwater rise due to logjams is required to inform river restoration as well as flood hazard assessment efforts. Backwater rise due to channel spanning logjams can be described based on analytical and empirical models. However, logjams can exhibit various shapes, including partially spanning logjams. The hydrodynamic response to logjams that partially span the channel lateral extent has not been studied so far. Therefore, a series of flume experiments was conducted at the Laboratory of Hydraulics, Hydrology and Glaciology (VAW) at ETH Zurich to study how the flow depth and flow velocity are altered by partially spanning logjams with a lateral gap. The objectives were to determine how the jam relative width (jam width to channel width) influenced flow heterogeneity, described by flow velocity and turbulent kinetic energy, and to predict the backwater rise. Initial results demonstrated that logjams with a relative width B_rel ≥ 0.5 created two distinct zones of velocity and increased flow heterogeneity. In addition, backwater rise increased with increasing relative logjam width. As a next step, the existing analytical model for channel spanning logjams will be adapted to describe backwater rise due to partially spanning logjams.

How to cite: Schalko, I., Follett, E., and Nepf, H.: Hydrodynamic Response to Partially Spanning Logjams, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-8699, https://doi.org/10.5194/egusphere-egu22-8699, 2022.

In the UK Leaky wooden dams (LWD) have become an increasingly popular method of Natural Flood Management (NFM) and river restoration. LWD are in and/or across channel structures made from woody material designed to mimic naturally occurring woody debris that is often found in riverine environments. LWDs aim to reduce flooding downstream by holding back water and promoting flow onto the floodplain, increasing connection with the floodplain and infiltration by diverting water onto the floodplain. A key difference between woody debris and LWD are that LWD are usually secured and unable to move and adjust within the river and LWD are sometimes placed in areas where woody debris would not naturally occur. With the large scale and quick implementation of LWD there is a lack of critique or investigation into the geomorphic impacts of LWD. Instead, researchers and practitioners have been using what is known about the geomorphic impacts of natural woody debris to explain and predict the geomorphic impacts of LWD – even though it has been established that they are fundamentally different. This project investigates the geomorphic impacts of different styles and configurations of LWD through the use of analog physical models, surface velocimetry and structure from motion photogrammetry. Using these techniques this research aims to identify any patterns in flow and sediment dynamics both up and downstream of LWDs and to further our understanding of the specific geomorphic impacts of different LWD structures. Identifying the specific geomorphic impacts of LWD is important to be able to understand if they are having a detrimental impact to the river systems where they have been installed in the UK and to be able to inform best practice for the future.

How to cite: Carter, C., Coulthard, T., Thomas, R., and McLelland, S.: Understanding the geomorphic impacts of Leaky Wooden Dams (LWDs) through utilising analog physical models, structure from motion photogrammetry and surface velocimetry., EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-10199, https://doi.org/10.5194/egusphere-egu22-10199, 2022.

Understanding the dynamic of instream large wood (LW) is essential for reducing hydrogeomorphic hazards in populated mountainous catchments. Quantifying the spatiotemporal distribution of LW is generally the most demanding process for investigating LW dynamics in rivers. Over the last two decades, multiple airborne sensors have been applied for mapping LW in relatively large alluvial rivers. However, those existing approaches are not necessarily suitable for remotely sensing LW in forested headwater streams, mainly due to canopy obstruction, weak illumination, and operational difficulty. Therefore, we tested the applicability of a 5-kilogram commercial backpack mobile laser scanning system for detecting and quantifying LW in a forested headwater stream of southwest Japan. Extremely dense point clouds (~15000 pts/m²) were continuously scanned within 150-meter reach of the 2nd-order stream (slope: 0.045) by a 6-minute walk following rainfall-triggered debris flows. Dimension and volume of LW measured from point clouds were compared to associated field and UAV photogrammetry-based mapping data. Based on a surface shape detection algorithm and subsequent manual filtering of falsely detected objects (e.g., riparian trees), 25 cylinders corresponding to 34.9 m³ total volume were delineated from point clouds. While the UAV photogrammetry-based approach was able to quantify only 2.4% of total LW volume, 75.1% of LW volume was successfully reconstructed by backpack mobile laser scanning. The visibility of the UAV photogrammetry-based approach was substantially limited by the dense riparian vegetation of our study reach. However, underestimation of wood piece length and overestimation of wood piece diameter consistently occurred for both remote sensing approaches. Therefore, further efforts would be made to evaluate the sensitivity of individual parameters used in point cloud processing for LW detection and quantification. Considering the mobility of sensors and data availability of near-surface objects, our case study indicates that backpack mobile laser scanning potentially provides a powerful alternative for more continuous, efficient, and frequent LW mapping, particularly in forested headwater streams.

How to cite: Koyanagi, K., Yamada, T., and Ishida, K.: Using backpack mobile laser scanning system for mapping large wood in a forested headwater stream of southwest Japan, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-10651, https://doi.org/10.5194/egusphere-egu22-10651, 2022.

In low flow conditions, wood transport is limited but still important. In addition, low flows are significant to stress a numerical model of Large Wood (LW) transport and to assess its capacity in simulating LW displacement or non-displacement.  The solver ORSA2D_WT was employed and tested to improve the knowledge related to these thresholds (moving vs not moving). The software couples the solution of the 2D Shallow Water Equations to a dynamic Discrete Element Model that computes the hydrodynamic forces to calculate LW transport. To assess whether ORSA2D_WT can cope with the infrequent mobilization of LW in low flow conditions, it is applied to a reach of the Piave River (North-East Italy), where the wood budget was already investigated. Field data about LW position, mobilization, shape, size and orientation, flow conditions and morphological changes were collected.

The critical aspects that affect the model performance and that deserve an in-depth analysis are the wood-riverbed interaction and the log shape representation in the model. ORSA2D_WT works in fixed-bed conditions, computing a 2D force balance to determine wood entrainment. It considers only cylindrical forms or jams composed by cylindrical elements, whose relevant hydrodynamic parameters are the longitudinal cross-section and the hydrodynamic coefficients, that depend also on the log orientation to the flow.

Regarding wood-riverbed interaction, bed friction plays a significant role compared to the forces that trigger wood motion. This is especially true in low flow conditions when floatation is less important than rolling/sliding. The local erosion that occurs nearby wood pieces likely influences wood mobilization, as well as the presence of roots and/or branches.

To assess if the model schematizations are sufficiently accurate for low flow conditions and to overcome the model limitations, the friction and hydrodynamic coefficients are suitably corrected. In particular, the influence of the local water level on the friction coefficient is investigated, and the hydrodynamic coefficients are modified to include different LW shapes. The modified model is calibrated with the data available for one sub-reach and then applied to a different sub-reach, to assess its performance.

How to cite: Persi, E., Petaccia, G., Sibilla, S., Picco, L., and Tonon, A.: Modeling the effects of low flow on wood transport in the Piave River, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-6472, https://doi.org/10.5194/egusphere-egu22-6472, 2022.