The role of vegetation on gully erosion stabilization at a severely degraded landscape: A case study from Calhoun Experimental Critical Zone Observatory

Bastola, Satish; Dialynas, Y. G.; Bras, Rafael L.; Noto, Leonardo; Istanbulluoglu, Erkan

doi:10.1016/j.geomorph.2017.12.032

Cited by 46 publications

(13 citation statements)

References 44 publications

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“…In general, the outer face of the gullies is more stabilized than the inner face because erosion caused greater changes in its chemical and physical attributes. When conducting a case study to evaluate the role of vegetation in the stabilization of erosive processes by gullies in a degraded landscape in critical areas of Calhoun, Bastola et al (2018) verified that environments with pre-established vegetation were more stable.…”

Section: Axismentioning

confidence: 79%

Physical and chemical attributes of soil on gully erosion in the Atlantic forest biome

et al. 2020

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Soil is a fundamental natural resource for subsistence and development of humanity, exploited mainly for agriculture. Agricultural practices, though, are improperly performed, compromising edaphic conditions and favoring erosive processes, which mainly culminate in the loss of soil and nutrients. Water erosion represents the main form of soil degradation, given that the impact of raindrops on the soil results in the detachment of particles, a process favored by factors such as climate, relief, soil vegetation and use and occupation. The objective of the study was to classify four gullies based on their evolutionary turns and to judge the physical-chemical classifications of the soil at the internal and external faces of the gullies. The morphology of the gullies was classified by aerial images generated by drones. The gullies were mapped using Google Earth images from 2016. The qualitative assessment was performed using the digital field-elevation curvature (MDESC) model with field validation. Deformed samples were collected at depths of 0-10 and 10-20 cm, while non-deformed samples were collected at depths of 0.0-0.10 cm to evaluate their chemical and physical attributes. A nonparametric 5% Kruskal-Wallis statistical analysis was performed on the resulting data. The chemical and physical attributes of the soil differed according to the evolutionary stage of the surfaces (internal and external) at depths of 0 to 10 cm, while the faces showed differences in depth of 10 to 20 cm.

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Section: Axismentioning

confidence: 79%

Physical and chemical attributes of soil on gully erosion in the Atlantic forest biome

et al. 2020

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“…CHILD, SIBERIA, LAPSUS, and CAESAR‐Lisflood have been used in a series of studies to assess the effects of vegetation on the topography of a former mining quarry (Evans et al, 1998), on drainage density (Collins et al, 2004; Istanbulluoglu & Bras, 2005), on channel length profile (Collins & Bras, 2010), and on ravine formation (Bastola et al, 2018). In these studies, depending on the LEM used, the effects of vegetation on hydrological processes and soil cohesion were taken into account in different ways.…”

Section: Review Of Methods Used To Create Virtual Catchmentsmentioning

confidence: 99%

Generation of realistic synthetic catchments to explore fine continental surface processes

Bunel

Copard

Guérin

et al. 2021

Earth Surf Processes Landf

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Understanding, analysing, and predicting the erosion mechanisms and sedimentary flows produced by catchments plays a key role in environmental conservation and restoration management and policies. Numerical case-testing studies are generally undertaken to analyse the sensitivity of flood and soil erosion processes to the physical characteristics of catchments. Most analyses are conducted on simple virtual catchments with physical characteristics that, unlike real catchments, are perfectly controlled. Virtual catchments generally correspond to V-shaped valley catchments. However, although these catchments are suitable for methodical analysis of the results, they do not provide a realistic representation of the spatial structures of the landscape and field conditions. They can, therefore, lead to potential modelling errors and can make it difficult to extend or generalize their results. Our proposed method bridges the gap between real and traditional virtual catchments by creating realistic virtual catchments with perfectly controllable physical characteristics. Our approach represents a real alternative to traditional test case procedures and provides a new framework for geomorphological and hydrological communities. It combines a field procedural generation approach, geographic information system processing procedures, and the CAESAR-Lisflood landscape evolution model. We illustrate how each of these components acts in the process of generating virtual catchments. Five physical parameters were adjusted and tested for each virtual catchment: drainage density, hypsometric integral, mean slope of the main channel, granulometry, and land use. One of our virtual catchments is compared with a real catchment and a virtual catchment produced by a standard method. This comparison indicates that our approach can produce more realistic virtual catchments than those produced by more traditional methods, while a high degree of controllability is maintained. This new method of generating virtual catchments therefore offers significant research potential to identify the impacts of the physical characteristics of catchments on hydro-sedimentary dynamics and responses.

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“…Asimismo, la nula o escasa cobertura vegetal en los taludes de las cárcavas, favorece el crecimiento lateral e inestabilidad de los taludes, al no haber una relación entre las raíces y las partículas, que mejore la cohesión y la resistencia del suelo. Esta información sugiere que el control de cárcavas, no solo consiste en construir presas de control de azolves, sino que, se debe propiciar la revegetación natural sobre los taludes como ha sido recomendado por Heede (1976) y Bastola et al (2018), así como algunas técnicas que favorezcan la cementación de las partículas del suelo, a f in de disminuir la energía de impacto del escurrimiento, mejorar las fuerzas cohesivas y la resistencia al esfuerzo de corte. Complementariamente, se debe considerar el cabeceo de las cárcavas, la construcción de canales de desviación del flujo superf icial, la revegetación o la construcción de sistemas de terrazas en los terrenos aledaños de las cárcavas.…”

Section: Conductividad Hidraúlica Mediaunclassified

Evaluación de la estabilidad de taludes en cárcavas, Huasca de Ocampo, Hidalgo, México.

Sánchez¹,

Fernández-Reynoso²,

Menez³

et al. 2019

Terra

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In Santo Domingo, Huasca de Ocampo, Hidalgo, changes in the use of soil, the topographic and geomorphological conditions and the increase of runoffs, promote the formation of gullies in agricultural areas, causing the loss of soil fertility and a reduction of agricultural land. The objective of our research was to identify the main topographic features and physical/mechanical properties of the soil that cause a sidewall retreat of gullies (AV); determination was performed through principal component analysis (PCA) and multiple linear regression (MLR). The AV varied from 0.04 to 0.17 m yr‑1 with a mean value of 0.092 m yr-1. The most important variables in the PCA were: height, slope, orientation, vertical and horizontal curvature, transversal slope, ridge thickness, bulk density (0 to 5 and 5 to 10 cm), penetration resistance (2.5, 5 and 10 cm), hydraulic conductivity, shrinkage index, plasticity index, 0.25, 0.15 and 0.075 mm particles, cohesion and soil erodibility factor. The best linear regression explanatory model presented a f it value of 84.02% using four variables (particles of 0.15 and 0.075 mm, slope and ridge thickness). The AV is influenced by the presence of silt and clay in the regolith and soil surface (ridge), which are vulnerable to wetting and drying processes that boost the formation of cracks and disaggregation of the components of ridge and slope, reducing the soil’s resistance to erosion and causing headward erosion and instability in the gully slopes.

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The role of vegetation on gully erosion stabilization at a severely degraded landscape: A case study from Calhoun Experimental Critical Zone Observatory

Cited by 46 publications

References 44 publications

Physical and chemical attributes of soil on gully erosion in the Atlantic forest biome

Physical and chemical attributes of soil on gully erosion in the Atlantic forest biome

Generation of realistic synthetic catchments to explore fine continental surface processes

Evaluación de la estabilidad de taludes en cárcavas, Huasca de Ocampo, Hidalgo, México.

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