The effect of fracture properties on preferential flow in carbonate-derived laterite from karst mountainous agroforestry lands

Liu, Dongdong; She, Dongli

doi:10.1016/j.still.2020.104670

Cited by 13 publications

(19 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the infiltration event, the infiltration rate of Brilliant Blue FCF was over 1.5 times slower and the infiltration depth was 1.2-3.8 times lower than those of water, which may be attributed to the fact that the viscosity of water was different from that of Brilliant Blue FCF. A similar phenomenon was observed by Liu and She (2020a), who showed that a large organic molecule size and nonlinear adsorption behaviour within the soil matrix led to slow migration rates. This may be due to the retardation caused by the reaction between Brilliant Blue FCF and Ca 2+ in carbonate laterite areas (Flury and Flühler 1995;Nobles et al, 2010).…”

Section: Effect Of Crack Properties On Preferential Flowsupporting

confidence: 80%

Investigating the effect of soil cracks on preferential flow using ground-penetration radar surveys and infiltration experiment in karst, Southwest China

Hou

Cheng

Guan

2022

Preprint

View full text Add to dashboard Cite

Soil cracks significantly affect preferential flow; however, there are some uncertainties associated with the effect of soil cracks on preferential flow in karst areas in southwest China. In this study, ground-penetrating radar (GPR) was applied to pedons to investigate the soil crack properties (inclusion, width, and configuration). Blue dye tracing experiments were designed, based on geophysical detection results, to assess the influences of inclusions (sand grains and rock fragments), crack width (1, 1.5, and 2 cm), and configuration (I-shape, V-shape, and Λ-shape) on the preferential flow. Our results indicated that (1) GPR envelope can describe the configuration of isolated soil cracks; (2) the Brilliant Blue FCF (C.I. Food Blue 2) infiltration rate and depth were over 1.5 times slower and 1.2–3.8 times lower those of water, respectively, during infiltration; (3) soil cracks can accelerate infiltration and increase the maximum dye-penetration depth, cumulative infiltration, and wetting front depth by at least an average of 5.2% and 63.2%, respectively; and (4) the I- and Λ-shaped soil crack configurations contributed to preferential flow, while the flow was not observed along the V-shaped configuration crack pore paths. The I-shaped configurations, with a width of 1.5 cm, were filled with rock fragments and had higher preferential flow ratios (18.2%–52.3%) and length indexes (4.0%–33.8%) than those of other configurations. Inclusions, crack widths, and configurations had significant influences on preferential flow ( p < 0.05). The influence of soil crack properties on preferential flow cannot be neglected during vegetation restoration and groundwater security processes in karst areas.

show abstract

Section: Effect Of Crack Properties On Preferential Flowsupporting

confidence: 80%

Investigating the effect of soil cracks on preferential flow using ground-penetration radar surveys and infiltration experiment in karst, Southwest China

Hou

Cheng

Guan

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Rock desertification accounted for nearly 22.3% of the karst areas in southwest China by the end of 2016 (http://www.gov.cn/xinwen/2018-12/13/content_5348378.htm#1). It has become a severe environmental issue that threatens the sustainable development of socioeconomic and ecological environments (Z. Jiang, Lian, & Qin, 2014; D. D. Liu & She, 2020; G. J. Zhao et al, 2013). Therefore, a variety of vegetation restoration projects (e.g., converting cropland to forestry and grassland [CCFG]) have been implemented in degraded karst ecosystems in southwest China since the 1980s (Y. Li et al, 2018; D. D. Liu & She, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…It has become a severe environmental issue that threatens the sustainable development of socioeconomic and ecological environments (Z. Jiang, Lian, & Qin, 2014; D. D. Liu & She, 2020; G. J. Zhao et al, 2013). Therefore, a variety of vegetation restoration projects (e.g., converting cropland to forestry and grassland [CCFG]) have been implemented in degraded karst ecosystems in southwest China since the 1980s (Y. Li et al, 2018; D. D. Liu & She, 2020). CCFG resulted in farmers replacing their crops with trees or grass.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Therefore, a variety of vegetation restoration projects (e.g., converting cropland to forestry and grassland [CCFG]) have been implemented in degraded karst ecosystems in southwest China since the 1980s (Y. D. D. Liu & She, 2020).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of vegetation restoration on carbonate‐derived laterite erodibility in karst mountain areas

2022

Self Cite

View full text Add to dashboard Cite

Vegetation restoration can exert a profound influence on surface soil characteristics, which likely plays a significant role in the evolution of soil erodibility. This study was conducted to quantify the effects of vegetation restoration on the soil erodibility of carbonate-derived laterite in karst areas. Experiments were conducted at two representative sites for different years of vegetation restoration. Six karst mountain land use types [grassland (Y1), shrubland (Y2) and woodland (Y3) in young forest (YF); forest trails (O1), shrubland (O2) and woodland (O3) in old forest (OF)]. A structural equation model and random forest regression analysis were applied to distinguish the key environmental factors dominating soil erodibility. The results showed that the soil erodibility K factor exponentially decreased with increasing restoration age and tended to remain stable after 20 years (y = 0.0466 + 0.0316e À0.2889x , R 2 = 0.98). The K factor in the OF decreased by an average of 2.1%-14.8% compared to those in the YF. A structural equation model indicated that vegetation restoration indirectly reduced soil erodibility by altering plant growth and coverage and its associated soil property changes. A random forest regression analysis of global datasets indicated that soil erodibility is mainly affected by topographical factors (i.e., latitude, elevation and slope), and their mean decrease accuracy values (IncMSE) exceeded 20%. Both forestland and shrubland were not considered as the most important factors for affecting global soil erodibility. Conversely, grassland, cropland and bare land were among the important factors. These results could guide the potential benefits of vegetation restoration strategies to meet soil conservation and ecosystem function goals in karst mountain ecosystems.

show abstract

Investigating the effect of soil cracks on preferential flow using a dye tracing infiltration experiment in karst in Southwest China

2022

View full text Add to dashboard Cite

Soil cracks significantly affect the preferential flow, and various uncertainties are associated with the effect of soil cracks on preferential flow in karst areas in Southwest China. This study investigated soil crack properties (inclusions, width, and configuration) by applying ground‐penetrating RADAR (GPR) to pedons. Blue dye‐tracing experiments were designed based on the geophysical detection results to assess the influences of crack inclusions (sand grains and rock fragments), crack widths (1, 1.5, and 2 cm), and configurations (I‐shape, V‐shape, and Λ‐shape) on preferential flow. The following results were obtained: (1) the GPR envelope can describe the configuration of isolated soil cracks; (2) soil cracks can accelerate infiltration and increase the maximum dye‐penetration depth, cumulative infiltration, and wetting‐front depth by averages of at least 5.2%, 63.2% and 4.4%, respectively; and (3) the I‐ and Λ‐shaped soil crack configurations contributed to preferential flow, but the preferential flow was not observed along the V‐shaped‐configuration‐crack pore paths despite the retardation of brilliant blue FCF. The I‐shaped configurations, with a crack width of 1.5 cm, were filled with rock fragments and had higher preferential flow ratios (18.2%–52.3%) and length indices (4.0%–33.8%) compared to the other configurations. In summary, inclusions, crack width, and configuration significantly influence the preferential flow (p < 0.05), and the influence of these soil crack properties on preferential flow cannot be neglected during vegetation restoration and groundwater security operations in karst areas.

show abstract

The effect of fracture properties on preferential flow in carbonate-derived laterite from karst mountainous agroforestry lands

Cited by 13 publications

References 39 publications

Investigating the effect of soil cracks on preferential flow using ground-penetration radar surveys and infiltration experiment in karst, Southwest China

Investigating the effect of soil cracks on preferential flow using ground-penetration radar surveys and infiltration experiment in karst, Southwest China

Effects of vegetation restoration on carbonate‐derived laterite erodibility in karst mountain areas

Investigating the effect of soil cracks on preferential flow using a dye tracing infiltration experiment in karst in Southwest China

Contact Info

Product

Resources

About