Modeling soil-plant-water interaction

Gadi, Vinay Kumar; Singh, Sushant; Singhariya, Manish; Garg, Ankit; Sreedeep, S.; Ravi, K.

doi:10.1108/ec-07-2017-0280

Cited by 19 publications

(3 citation statements)

References 50 publications

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“…While the physical design, construction, and installation of engineered elements within rain gardens are well developed, the selection of plant species, or species identity, and biodiversity (e.g., plant species composition, relative abundance, species richness, and functional diversity) and their contribution to function frequently receive less attention (Kremer et al, 2016;Wootton-Beard et al, 2016). Plants significantly enhance green infrastructure performance by increasing water infiltration and absorption (Gadi et al, 2018), removing water pollutants (Jacklin et al, 2021b), improving air quality (Barwise et al, 2021), and decreasing surface and near-surface air temperatures (Jim, 2012;Skala et al, 2020). Despite the added value of vegetation, the idea of selecting species to maximize rain garden function based on ecophysiology (Barwise et al, 2021;Jacklin et al, 2021a) and diversity (MacIvor et al, 2018) is relatively unexplored, yet the benefits of planting mixtures should be similar to those demonstrated in natural and experimental communities (Cardinale et al, 2012;Levin & Mehring, 2015;van der Plas, 2019).…”

Section: Introductionmentioning

confidence: 99%

Planting design influences green infrastructure performance: Plant species identity and complementarity in rain gardens

Bruner

Palmer

Griffin

et al. 2023

Ecological Applications

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Green infrastructure's capacity to mitigate urban environmental problems, like heat island effects and excessive stormwater runoff, is partially governed by its plant community. Traditionally, green infrastructure design has focused on engineered aspects, such as substrate and drainage, rather than on the properties of its living components. Since the functioning of these plant assemblages is controlled by ecophysiological processes that differ by species, the identity and relative abundance of the species used will influence green infrastructure performance. We used trait‐based modeling to derive principles for the effective composition of green infrastructure plant assemblages, parameterizing our model using the vegetation and ecophysiological traits of the species within New York City rain gardens. Focusing on two plant traits that influence rain garden performance, leaf surface temperature and stomatal conductance, we simulated the cumulative temperature and transpiration for plant communities of differing species composition and diversity. The outcomes of the model demonstrate that plant species composition, species identity, selection effects, and interspecific complementarity increase green infrastructure performance in much the way biodiversity affects ecosystem functioning in natural systems. More diverse assemblages resulted in more consistent transpiration and surface temperatures, with the former showing a positive, saturating curve as diversity increased. While the dominant factors governing individual species leaf temperature were abiotic, transpiration was more influential at the community level, suggesting that plants within diverse communities may be cooler in aggregate than any individual species on its own. This implies green infrastructure should employ a variety of vegetation; particularly plants with different statures and physical attributes, such as low‐growing ground covers, erect herbaceous perennials, and shrubs.

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Section: Introductionmentioning

confidence: 99%

Planting design influences green infrastructure performance: Plant species identity and complementarity in rain gardens

Bruner

Palmer

Griffin

et al. 2023

Ecological Applications

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“…Due to the catastrophic consequence caused by slope failure, many reinforcement methods have been developed, such as drainage systems [7], stabilizing piles [8], reinforcement of vegetation, among others. Due to its environmentally friendly characteristics compared to soil nails, geosynthetics, retaining structures, gabions and shotcrete, the reinforcement of vegetation, such as grass and shrubs, on the slope stability, has been gradually recognized [9][10][11][12][13][14][15][16][17][18][19][20], and there are an increasing number of slope protection engineering with vegetation grew on the slope in recent years [19][20][21][22][23][24][25][26][27][28]. In fact, vegetation-soil interaction and plant-soil-atmosphere interaction are rather complex, thus the mechanism and effectiveness of vegetation reinforcement on slope stability are significant and it has attracted much attention of researchers.…”

Section: Introductionmentioning

confidence: 99%

Stability Reinforcement of Slopes Using Vegetation Considering the Existence of Soft Rock

Liu¹,

Bi²,

Wang³

et al. 2021

Applied Sciences

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This study investigates the effectiveness of vegetation reinforcement on the stability of a slope with red-bed soft rock in a slope along the Xining-Chengdu railway, China. Four kinds of vegetation were considered to reinforce the soil and the slope. The rooted soil parameters were determined based on the laboratory tests. A numerical model was developed based on the actual geometry and soil layer distributions. The soils were modeled as elastic perfectly plastic materials and the vegetation reinforcement was represented as addition cohesion of a series of subsoil layers within a given depth. The effectiveness of vegetation on slope reinforcement under both dry and rainfall conditions was investigated regarding this case. The potential failure surface and corresponding factor of safety of the red-bed soft rock slope for those different conditions were analyzed and compared. It has been found that the addition of vegetation increased the safety of slope stability whether the slope is under a dry condition or a rainfall condition, while the increasing proportion of factor of safety due to vegetation reinforcement for this case is very limited. The results and findings in this study are still significant for the practitioner to evaluate the reasonability of vegetation reinforcement.

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“…At present, the evaluation of slope vegetation protection mainly includes mechanical and hydraulic mechanisms (Gonzalez-Ollauri & Mickovski, 2017;Feng, Liu & Ng, 2020). Based on both mechanisms, three vegetation protection theories were proposed, namely, mechanical reinforcement is provided by plant roots (Jin et al, 2019), the excess pore-water pressure in soil is dissipated by root water uptake (Liu, Feng & Ng, 2016) and soil matric suction is induced via plant transpiration (Ng et al, 2013;Gadi et al, 2019). The most obvious way in which vegetation enhances slope stability is root reinforcing.…”

Section: Introductionmentioning

confidence: 99%

The mechanism of the plant roots’ soil-reinforcement based on generalized equivalent confining pressure

Xia

Liu

Xiao

et al. 2020

PeerJ

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Background To quantitatively evaluate the contribution of plant roots to soil shear strength, the generalized equivalent confining pressure (GECP), which is the difference in confining pressure between the reinforced and un-reinforced soil specimens at the same shear strength, was proposed and considered in terms of the function of plant roots in soil reinforcement. Methods In this paper, silt loam soil was selected as the test soil, and the roots of Indigofera amblyantha were chosen as the reinforcing material. Different drainage conditions (consolidation drained (CD), consolidation undrained (CU), and unconsolidated undrained (UU)) were used to analyse the influences of different root distribution patterns (horizontal root (HR), vertical root (VR), and complex root (CR)) and root contents (0.25%, 0.50%, and 0.75%) on the shear strength of soil-root composites. Results The cohesion (c) values of the soil-root composites varied under different drainage conditions and root contents, while the internal friction angle (φ ) values remain basically stable under different drainage conditions. Under the same root content and drainage conditions, the shear strength indexes ranked in order of lower to higher were HR, VR and CR. The GECP of the soil-root composites with a 0.75% root content was 1.5–2.0 times that with a 0.50% root content and more than 5 times that with a 0.25% root content under the CD and CU conditions. The GECP in reinforced soil followed the sequence of CD > CU > UU. The GECP of the plant roots increased as confining pressure increased under CD and CU conditions while showed a complex change to the confining pressure under the UU condition. Conclusion It was concluded that the evaluation of plant root reinforcing soil based on GECP can be used to measure effectively the influences of roots on soil under different drainage conditions and root distribution patterns.

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Modeling soil-plant-water interaction

Cited by 19 publications

References 50 publications

Planting design influences green infrastructure performance: Plant species identity and complementarity in rain gardens

Planting design influences green infrastructure performance: Plant species identity and complementarity in rain gardens

Stability Reinforcement of Slopes Using Vegetation Considering the Existence of Soft Rock

The mechanism of the plant roots’ soil-reinforcement based on generalized equivalent confining pressure

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