Influence of the spatial layout of vegetation on the stability of slopes

Fan, Chia-Cheng; Lai, Yeong‐Lin

doi:10.1007/s11104-012-1569-9

Cited by 49 publications

(25 citation statements)

References 16 publications

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“…The root system morphology affects the mechanical properties of root-soil composites [14,15]. It is important to describe the root distribution, especially on the time scales used to evaluate the effects The living brush mattress is widely used as an asexual reproductive technique in soil bioengineering projects because of its characteristics of simple construction, low cost and quick effect [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The soil shear strength of root-soil composites, which can directly reflect the effect of the root system on the soil [14,31], is influenced by many factors, such as the root strength, root branches, root hairs and secretions that are difficult to reconstruct in laboratory experiments [32]. Furthermore, in assessment models of root-to-soil reinforcement effects, such as the simple force equilibrium theory [33,34], the fiber bundle model [35] and the root bundle model [36], the shear strength of the rooted soil has been used as a factor to evaluate slope stabilization.…”

Section: Introductionmentioning

confidence: 99%

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Spatio-Temporal Dynamic Architecture of Living Brush Mattress: Root System and Soil Shear Strength in Riverbanks

Zhang

Cheng

Liu

et al. 2018

Forests

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Abstract:As a basal measure of soil bioengineering, the living brush mattress has been widely applied in riparian ecological protection forest construction. The living brush mattress shows favorable protective effects on riverbanks. However, there are few reports on the root structure and the soil strengthening benefit of the living brush mattress. The present work reports a series of experiments on root morphology and soil shear strength enhancement at the temporal and spatial scales. The object of the study is 24 living brush mattress trees constructed with Salix alba L. 'Tristis' (LBS hereafter). Traditional root morphology and mechanical measurement methods were used to collect the parameters. The results showed that the root systems of LBS had the characteristics of symmetry and upslope growth. The roots were mainly distributed in a cylindrical region of the soil (radius × thickness: 0.4 m × 0.5 m) and their biomass increased with different growth rates for the periods from 1 to 5 and from 5 to 7 years. Both age and slope position were factors that influence root growth. The root diameter falls within 0-5 mm, has a significant effect on the soil shear strength and provides a conical-shape potentiation zone to ensure the efficient protection of a riverbank. The results of this study demonstrate that LBS is an efficient and feasible engineering measure in the field of riverbank protection.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatio-Temporal Dynamic Architecture of Living Brush Mattress: Root System and Soil Shear Strength in Riverbanks

Zhang

Cheng

Liu

et al. 2018

Forests

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“…Características como topografia, geomorfologia, presença de vegetação e atividade antrópica são fatores que interferem na estabilidade dos taludes, visto que elas modificam parâmetros como declividade, resistência ao cisalhamento, propriedades físicas, capacidade de retenção de água no solo e regime climático (HENSHAW et al, 2012;LAI, 2014). No entanto, quando as forças que atuam no solo são superiores às que promovem a estabilidade, o processo de desprendimento de massa de solo é iniciado e, consequentemente, ocorre erosão.…”

Section: Introductionunclassified

Influência Dos Atributos Físico-Mecânicos Do Solo Na Estabilidade Do Talude Do Rio São Francisco

Filho

Holanda

Pedrotti

et al. 2017

RSA

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Resumo -O uso intensivo do solo das margens do rio São Francisco em seu baixo curso, exerce influência direta na sua degradação, potencializando a ocorrência da erosão marginal e, alterando a dinâmica fluvial. O objetivo deste estudo foi caracterizar os atributos físicos e mecânicos do solo em talude fluvial, relacionando-os com à susceptibilidade a erosão no Baixo curso do rio São Francisco. O ensaio experimental foi conduzido na margem direita do rio São Francisco, localizado no Município de Amparo do São Francisco, nordeste do Brasil, em talude com solo classificado como Neossolo Flúvico. Foram realizadas coletas de amostras indeformadas e deformadas de solo com execução de sondagem a trado, até o nível freático, e a caracterização dos atributos físicos e mecânicos do solo em laboratório. A predominância de camadas mais arenosas possibilitou maior ângulo de atrito interno e consequentes diminuição da coesão e redução da resistência ao cisalhamento levando a intensificação dos movimentos de massa. Os processos de saturação e secagem, através das elevações da cota do rio, comprometeram a estabilidade do talude. A granulometria do solo do talude é determinante para a suscetibilidade ao processo erosivo, e consequentemente para o comportamento mecânico desse talude. Palavras-Chave-Cisalhamento direto, coesão, erosão marginalAbstract -The use of the riparian areas with agriculture in the Lower San Francisco has a direct effect on the degradation of these resources causing, bank erosion, and the imbalance in the river dynamics. The objective of this study was to verify the influence of soil physical and mechanical attributes in the susceptibility of the riverbanks to erosion in the lower São Francisco. The experimental area was located in the municipality of Amparo de São Francisco, located in the state of Sergipe, northeastern Brazil, in soil classified as Neossolo Flúvico. Undisturbed soil and then deformed soil samples were collected to run the auger boreholes down up to water level representing the slope layers. The predominance of more sandy layers allowed a greater angle of internal friction and consequent reduction of cohesion and reduction of shear strength leading to the intensification of soil mass movements. Saturation and drying through the elevations of the river quota compromise the slope stability. The texture of the slope material is closely related to the erosion susceptibility and the riverbank soil mechanical behavior.

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“…The capacity of the soil-root system on soil conservation and reinforcement is characterized by soil erosion resistance, soil scour resistance, and shear strength (De Baets et al 2006Pollen 2007;Genet et al 2008). A large number of studies showed that the effects of the soil-root system on soil conservation and reinforcement were significantly related to the characteristics of plant and soil including plant species, plant age, soil type, and soil moisture (Reubens et al 2007;Xu and Zeng 2008;Stokes et al 2009;Fan and Lai 2014). Among these characteristics, root structure and distribution were directly related to the enhancement of the soil-root system on soil conservation Ji et al 2012;Ghestem et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of Cynodon dactylon community on the conservation and reinforcement of riparian shallow soil in the Three Gorges Reservoir area

Chen

Zhang

et al. 2015

Ecol Process

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Introduction: Riparian vegetation plays a crucial role in soil conservation and riverbank reinforcement. The Three Gorges hydrologic project has significantly changed the pattern of water-level fluctuation and riparian environment, which significantly influenced plant community development and its effect on soil conservation and riverbank protection. Cynodon dactylon, a perennial grass with developed root system and creeping stems, has become a dominant riparian species in the Three Gorges area after the completion of the dam. We aimed to characterize how the soil-root system under the C. dactylon community responded to environmental changes and effects of the soil-root system on shallow soil conservation and riverbank reinforcement through field investigation and laboratory test. Methods: We conducted a field survey and experimental research. Quadrates of a natural C. dactylon community were set up on a riverbank along an altitude gradient. Plants were sampled randomly for the measurements of spatial structure and tensile strength of roots. Soil erosion resistance, soil scour resistance, and shear strength of sampled soil-root systems and control soil were tested in the laboratory.

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Influence of the spatial layout of vegetation on the stability of slopes

Cited by 49 publications

References 16 publications

Spatio-Temporal Dynamic Architecture of Living Brush Mattress: Root System and Soil Shear Strength in Riverbanks

Spatio-Temporal Dynamic Architecture of Living Brush Mattress: Root System and Soil Shear Strength in Riverbanks

Influência Dos Atributos Físico-Mecânicos Do Solo Na Estabilidade Do Talude Do Rio São Francisco

Effect of Cynodon dactylon community on the conservation and reinforcement of riparian shallow soil in the Three Gorges Reservoir area

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