The influence of woven geotextiles on ponding time and overland flow

Kořínek, J.; Nekardová, O.; Kovář, Pavel

doi:10.17221/4/2016-swr

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…In addition, changes in hydraulic behaviour (permeability and flow rate) and surface settlement are monitored. On the other hand, rainfall simulations on fibre-reinforced slopes can also be carried out in the laboratory to assess soil erosion [47][48][49].…”

Section: Laboratory Studiesmentioning

confidence: 99%

Natural Fibre for Geotechnical Applications: Concepts, Achievements and Challenges

Nguyên

Indraratna

2023

Sustainability

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Enhancing the use of natural fibre for geotechnical purposes has attracted greater attention in the past decade, mainly because of the tangible benefits that this green approach would bring to our sustainable infrastructure developments. While this topic has been subjected to often sceptical review or discussions, they usually focus on narrow aspects such as soil reinforcement, resulting in a lack of thorough assessment over different aspects and applications. The current paper hence aims to not only provide a more balanced review between theoretical concepts and practical perspectives, but also to link different functions of natural fibre that would facilitate design effectiveness. Three major geotechnical purposes of natural fibre in terms of the practice are identified and discussed, i.e., (i) soil reinforcement; (ii) enhanced drainage for soil consolidation; and (iii) filtration, separation and erosion controls. In these distinct applications, natural fibres, despite being used in different forms such as geotextiles, drains and individual fibres, often give significant contributions to improving soil structures, resulting in greater stabilization of the entire system. The key unique feature of natural fibres is their ability to generate biological bonding with soil media (i.e., biodegradation associated with reinforcement), while substantially improving the tensile strength of the soil structure, thus providing larger resistance to mud pumping, liquefaction, internal instability and erosion. Apart from successful findings and applications in practice, main challenges that are currently hampering the wider application of natural fibres will be addressed in this paper.

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Section: Laboratory Studiesmentioning

confidence: 99%

Natural Fibre for Geotechnical Applications: Concepts, Achievements and Challenges

Nguyên

Indraratna

2023

Sustainability

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“…The simulated rainfall was generated using a sprinkler-type rainfall simulator developed by the United States Department of Agriculture (USDA) and the Soil Erosion Research Institute of America (Kořínek et al, 2016). This system reproduces rainfall using the oscillation principle to stimulate natural rainfall processes.…”

Section: Experimental Treatmentsmentioning

confidence: 99%

Tradeoffs between soil conservation and soil‐water retention: The role of vegetation pattern and density

2021

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Balancing erosion control and the water conservation service is the primary goal of intensive revegetation in water-limited conditions. In this study, a field experiment was conducted in the dryland Chinese Loess Plateau (CLP), to investigate the role of vegetation pattern and density in their tradeoff between soil conservation (SC) and soil water retention (SWR). Five vegetation patterns (up-slope covered, downslope covered, low and high uniformly covered, no coverage) with three levels of grass density (220 g m À2 , 110 g m À2 , and 0) were designed and implemented. A novel indicator EEW (the exchange between erosion reduction and water consumption), as the cost of any extra depletion of soil water to improve each unit of soil conservation, was used to represent the tradeoff during a complete dry-wet-dry soil water convert cycle. The higher EEW, the poorer tradeoff between SC and SWR. It was illustrated that higher vegetation density could promote SC but not inevitably suppress EEW.The present typical grass density in CLP, round 220 g m À2 , was redundant in optimizing the SC-SWR tradeoff. A concentrated and centralized vegetation distribution mainly in the downslope obtained an EEW at 11.6 mm m 2 kg À1 and was confirmed as a favoured vegetation pattern. The simulated typical density and spatial pattern in CLP (about 220 g m À2 and uniformly distribution) had EEW at 20.5 mm m 2 kg À1 , by reducing the density to about 110 g m À2 and a downslope centralized vegetation redistribution, the EEW was reduced by 43.4%. Under long-term drought conditions at dry-wet-dry cycles, soil water decreased more sharply in the Full-covered plots, due to more evapotranspiration and vertical water loss caused by higher plant density, compared with half-covered and bare soil plots. The present study confirmed that planted density and vegetation pattern can manipulate SC-SWR tradeoff and it was thus possible to optimize it by adjusting revegetation's intensity and structures in practice.

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“…Rainfall simulations were performed by a sprinkler system named the Norton rainfall simulator. It was developed jointly by the United States Department of Agriculture (USDA) and the Soil Erosion Research Institute of America (Korinek et al, 2016). This system can reproduce rainfall artificially using the oscillation principle to stimulate initial soil erosion processes.…”

Section: Rainfall Simulation Proceduresmentioning

confidence: 99%

“…Rainfall intensities were adjusted by increasing or decreasing water pressure and switching nozzle frequencies. For example, if the frequencies were switched between 23 and 48 times per min with constant water pressure, the simulated rainfall intensities would reach 15.88 mm h -1 and 33.7 mm h -1 , respectively (Korinek et al, 2016). The Norton rainfall simulator is not recommended to work under high water pressure (the recommended pressure is 6 psi or 41.4 kPa).…”

Section: Rainfall Simulation Proceduresmentioning

confidence: 99%

Assessment of the impact of different vegetation patterns on soil erosion processes on semiarid loess slopes

Feng

Wei

Chen

et al. 2018

Earth Surf Processes Landf

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Soil erosion hinders the recovery and development of ecosystems in semiarid regions. Rainstorms, coupled with the absence of vegetation and improper land management, are important causes of soil erosion in such areas. Greater effort should be made to quantify the initial erosion processes and try to find better solutions for soil and water conservation. In this research, 54 rainfall simulations were performed to assess the impacts of vegetation patterns on soil erosion in a semiarid area of the Loess Plateau, China. Three rainfall intensities (15 mm h‐1, 30 mm h‐1 and 60 mm h‐1) and six vegetation patterns (arbors‐shrubs‐grass ‐A‐S‐G‐, arbors‐grass‐shrubs ‐A‐G‐S‐, shrubs‐arbors‐grass ‐S‐A‐G‐, shrubs‐grass‐arbors ‐S‐G‐A‐, grass‐shrubs‐arbors ‐G‐S‐A‐ and grass‐arbors‐shrubs ‐G‐A‐S‐) were examined at different slope positions (summits, backslopes and footslopes) in the plots (33.3%, 33.3%, 33.3%), respectively. Results showed that the response of soil erosion to rainfall intensity differed under different vegetation patterns. On average, increasing rainfall intensity by 2 to 4 times induced increases of 3.1 to 12.5 times in total runoff and 6.9 to 46.4 times in total sediment yield, respectively. Moreover, if total biomass was held constant across the slope, the patterns of A‐G‐S and A‐S‐G (planting arbor at the summit position) had the highest runoff (18.34 L m‐2 h‐1) and soil losses (197.98 g m‐2 h‐1), while S‐A‐G had the lowest runoff (5.51 L m‐2 h‐1) and soil loss (21.77 g m‐2 h‐1). As indicated by redundancy analysis (RDA) and Pearson correlation results, a greater volume of vegetation located on the back‐ and footslopes acted as effective buffers to prevent runoff generation and sediment yield. Our findings indicated that adjusting vegetation position along slopes can be a crucial tool to control water erosion and benefit ecosystem restoration on the Loess Plateau and other similar regions of the world. Copyright © 2018 John Wiley & Sons, Ltd.

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The influence of woven geotextiles on ponding time and overland flow

Cited by 5 publications

References 14 publications

Natural Fibre for Geotechnical Applications: Concepts, Achievements and Challenges

Natural Fibre for Geotechnical Applications: Concepts, Achievements and Challenges

Tradeoffs between soil conservation and soil‐water retention: The role of vegetation pattern and density

Assessment of the impact of different vegetation patterns on soil erosion processes on semiarid loess slopes

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