Rediscovering wood‐laden debris flow studies: A perspective from Japan DOI Creative Commons
Kenta Koyanagi,

Taku Yamada,

Kōji Ishida

et al.

Earth Surface Processes and Landforms, Journal Year: 2022, Volume and Issue: 48(1), P. 104 - 118

Published: Nov. 15, 2022

Abstract Debris flow is one of the dominant processes distributing large wood (LW) within mountainous catchments. However, little has been reviewed on wood‐laden debris (WLDF), presumably owing to limited reviewable works. This article, therefore, navigates international readers through 40 years WLDF studies, most which have published only in Japanese. Firstly, we historical development Japanese particularly focusing 1980s and 1990s. A series post‐disaster fieldworks from July 1982 Nagasaki flood 1990 Kumamoto provided 32 catchment‐scale budgeting data; empirical relationships among drainage area, tree species, sediment yield, loads associated with single disasters were illustrated. Secondly, characteristics summarized based relevant previous studies recruitment, transport, deposition LW during flows. Thirdly, discussed connectivity between those by relating/contrasting their research approaches spatiotemporal scales. In contrast global trends, almost exclusively regarded as hazardous materials (i.e., “driftwood” or “woody debris”) that need be retained upstream inhabited areas. Those practice‐oriented concentrated areas 10 −2 0 km 2 , representing 1–6 orders magnitude smaller spatial scales than generally covered existing studies. Strongly motivated engineering requirements, “dynamic” interactions flows floods also physically presented, mainly unique laboratory experiments involving steep flume (> 0.05) mobile bed conditions. Finally, some future works for briefly stated practical scientific perspectives. By “rediscovering” domestically developed channels since 1980s, a more comprehensive understanding dynamics river system may achieved.

Language: Английский

Plants and river morphodynamics: The emergence of fluvial biogeomorphology DOI
Angela M. Gurnell, Walter Bertoldi

River Research and Applications, Journal Year: 2024, Volume and Issue: 40(6), P. 887 - 942

Published: April 4, 2024

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

Language: Английский

Citations

10
First insight into the macroplastic storage in a mountain river: The role of in-river vegetation cover, wood jams and channel morphology DOI Creative Commons
Maciej Liro, Paweł Mikuś, Bartłomiej Wyżga‬‬

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 838, P. 156354 - 156354

Published: May 29, 2022

Macroplastic storage in mountain rivers remains unexplored and it is unknown how river morphology different surface types of areas modulate this process. Therefore, we sampled macroplastic debris stored on the emergent with vegetation cover wood jams a channelized, single-thread reach an unmanaged, multi-thread Dunajec River Polish Carpathians. Total amounts retained these reaches were then estimated basis mean mass deposited unit area each type given reach. Exposed sediments covered herbaceous significantly lower (0.6 0.9 g per 1 m2 average) than wooded islands (respectively 6 113 m2). The exceeded 19, 129 180 times those found islands, exposed sediments. Wooded covering 16.7% 1.5% 43.8% 41.1%, respectively, total amount that reach, whereas practically absent channelized Consequently, 2.4 wider neighbouring 36 greater km length. Our study demonstrated controlled by channel management style resultant morphology, which hydrodynamics longitudinal pattern zones transport retention conveyed flow.

Language: Английский

Citations

36
A review of large wood dynamics relevant to hazard characteristics for built structures DOI
Gaogao Fei, Xiekang Wang

Geomorphology, Journal Year: 2024, Volume and Issue: 453, P. 109152 - 109152

Published: March 13, 2024

Language: Английский

Citations

7
Porosity problems: Comparing and reviewing methods for estimating porosity and volume of wood jams in the field DOI

Bridget Livers,

Katherine B. Lininger,

Natalie Kramer

et al.

Earth Surface Processes and Landforms, Journal Year: 2020, Volume and Issue: 45(13), P. 3336 - 3353

Published: July 31, 2020

Abstract Porosity, or void space, of large wood jams in stream systems has implications for estimating volumes and carbon storage, the impacts on geomorphic ecological processes, instream habitat. Estimating porosity jam dimensions (i.e. volume) field is a common method measuring volume jams. However, very few studies explicitly address values jams, how calculated assessed accuracy, effect such estimates have budgets river corridors. We compare methods to estimate using data from four different depositional environments North America (jam types include small in‐channel channel‐margin island apex jam, coastal jam), results with previous studies. find that visual remain most time‐efficient estimation field, although they appear underpredict back‐calculated values; accuracy porosity, thus volume, are difficult definitively measure. also appears be scale invariant, dictated mostly by type, (which influenced processes), rather than size jam. Wood piece sorting structural organization likely influential properties these factors vary according environment. provide framework conceptual model uses demonstrate modeled differ give recommendations as catalyst future work conclude type and/or study goals may dictate which appropriate, we call greater transparency reporting © 2020 John Wiley & Sons, Ltd.

Language: Английский

Citations

43
Patterns of organic matter accumulation in dryland river corridors of the southwestern United States DOI Creative Commons
Ellen Wohl, Julianne Scamardo

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 833, P. 155136 - 155136

Published: April 9, 2022

Language: Английский

Citations

15
Effects of large wood (LW) blockage on bedload connectivity in the presence of a hydraulic structure DOI Creative Commons
Gabriel Spreitzer, Jon Tunnicliffe, Heide Friedrich

et al.

Ecological Engineering, Journal Year: 2021, Volume and Issue: 161, P. 106156 - 106156

Published: Jan. 25, 2021

Language: Английский

Citations

19
Physical modelling of large wood (LW) processes relevant for river management: Perspectives from New Zealand and Switzerland DOI
Heide Friedrich, Diego Ravazzolo, Virginia Ruíz‐Villanueva

et al.

Earth Surface Processes and Landforms, Journal Year: 2021, Volume and Issue: 47(1), P. 32 - 57

Published: June 30, 2021

Abstract In the last 30 years, work on large wood (LW) has expanded and matured considerably, river scientists, managers practitioners now have a better appreciation of role LW in maintaining ecosystems, forming or stabilizing riverine landforms, interacting with morphodynamics. We gained understanding hazards posed by recruitment transport channel associated infrastructure. While dynamics traditionally been studied natural environment, innovations laboratory techniques enabled important advances process dynamics, using physical scale models, new sensors, scanners sophisticated model boundary conditions. Current trends research focus (1) mobilization logs, (2) trapping deposition sediment presence (3) contribution to hydraulic flow resistance. Ultimately, combined is needed assess impacts upon infrastructure erodible boundaries, such as bridge piers retention racks. this review, we present critical analysis emerging experimental obtained through modelling studies. put recent context global management challenges. particular, set our environmental engineering issues that confront catchment resource Switzerland New Zealand. show how improved models incorporating transport, accumulation scouring processes are contribute more reliable hazard risk assessment LW‐prone systems.

Language: Английский

Citations

18
Laboratory Flume and Numerical Modeling Experiments Show Log Jams and Branching Channels Increase Hyporheic Exchange DOI
K. Wilhelmsen, Audrey H. Sawyer, Anna Marshall

et al.

Water Resources Research, Journal Year: 2021, Volume and Issue: 57(9)

Published: Sept. 1, 2021

Abstract Log jams alter gradients in hydraulic head, increase the area available for hyporheic exchange by creating backwater areas, and lead to formation of multiple channel branches bars that drive additional exchange. Here, we numerically simulated stream‐groundwater interactions two constructed flume systems—one without one with a series three jams—to quantify effects interacting jam structures on at stream flow rates. In simulations jams, average rates ranged from 2.1 × 10 −4 2.9 m/s various discharge scenarios, but increased range 1.3 −3 –3.5 m/s. Largely due these rates, connectivity or decreased turnover length water travels before zone, an order magnitude, drove long paths connected threads. Decreased lengths corresponded greater reaction significance per km, measure potential zone influence chemistry. For low‐flow conditions, log km five‐fold, 0.07 0.35. Jams larger volumes led longer residence times path exhibited scales Additionally, longest connecting occurred reach branches. These findings suggest large gains hydrologic can be achieved promoting in‐stream wood accumulation natural both branching channels.

Language: Английский

Citations

18
Large wood fluctuation and longitudinal connectivity conditions along a segment of the Blanco River (Chilean Patagonia) DOI
Andrés Iroumé, Alberto Paredes, Karla Sanchez

et al.

Geomorphology, Journal Year: 2024, Volume and Issue: 452, P. 109114 - 109114

Published: Feb. 27, 2024

Language: Английский

Citations

2
Morphodynamic research challenges for braided river environments: Lessons from the iconic case of New Zealand DOI
D. Murray Hicks, Edwin Baynes, Richard Measures

et al.

Earth Surface Processes and Landforms, Journal Year: 2020, Volume and Issue: 46(1), P. 188 - 204

Published: Oct. 10, 2020

Abstract Pressures on braided river systems in New Zealand are increasing due to anthropogenic stresses such as demand for irrigation water, braidplain conversion farmland and invasive vegetation, well extreme natural events associated with earthquakes climate change. These pressures create issues around preserving physical environments ecosystems, managing hazards floods, aggradation erosion. A need more robust understanding quantification of morphodynamic processes underpins many these issues. Here, we present eight research challenges service this need. The first four relate aggradation‐related flooding hazards; the last address stem largely from recent dairy expansion, which has created huge pressure take land water alp‐fed rivers alter flow regimes at their mouths. Hāpua, freshwater lagoons found where most meet coast, show complex behaviour response interplay coastal processes, special ecosystems sensitive sediment load changes. We discuss how laboratory experiments novel numerical modelling can help understand morphological undergo, those advances could inform planning legal decisions regulate rights allocation Zealand's braidplains. illustrate environmental engineering examples Kowhai, Waiho, Waiau, Rangitata Hurunui Rivers. © 2020 John Wiley & Sons, Ltd.

Language: Английский

Citations

18