Effects of subsurface rock fragment layers caused by simulated hoeing on near-surface rainfall-runoff processes

Dai, J.; Zhang, Jianhui; Xue, Ke; Li, Mingtao; Huang, Fucheng; Yang, Feng; Zhao, Hu; Xu, Yuanmao; Dai, Changjiang; Ma, Xiaoyun

doi:10.1016/j.still.2022.105594

Cited by 7 publications

(7 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The previous literature based on field investigations has revealed that the soil profile at the upslope boundary has completely disappeared, leading to bedrock exposure due to intensive tillage [17,21,22]. In the hilly areas of the Sichuan Basin, Southwestern China, intense tillage erosion often results in shallow soil depths, and in some cases, bedrock is even exposed on the summits of agricultural land.…”

Section: Study Sites and Experimental Designmentioning

confidence: 99%

Laboratory-Scaled Investigation into Combined Impacts of Temporal Rainfall Patterns and Intensive Tillage on Soil and Water Loss

et al. 2023

View full text Add to dashboard Cite

Many studies have focused on the impacts of rainfall duration and intensity, while overlooking the role of rainfall patterns on intensive tillage erosion in hilly agricultural landscapes. The objective of this study was to determine the combined effects of rainfall patterns and tillage erosion on surface runoff and soil loss on sloping farmland in the purple soil area of China. Five simulated rainfall patterns (constant, rising, falling, rising–falling, and falling–rising) with the same total precipitation were designed, and the intensive tillage treatment (IT) and no-tillage treatment (NT) were subjected to simulated rainfall using rectangular steel tanks (2 m × 5 m) with a slope of 15°. To analyse the differences in the hydrological characteristics induced by tillage erosion, we calculated the flow velocity (V), Reynolds number (Re), Froude number (Fr), and Darcy–Weisbach resistance coefficient (f). The results indicate that significant differences in surface runoff and sediment yield were found among different rainfall patterns and rainfall stages (p < 0.05). The falling pattern and falling–rising pattern had a shorter time gap between the rainfall initiation and runoff occurrence as well as a larger sediment yield than those of the other rainfall patterns. The value of f varied from 0.30 to 9.05 for the IT and 0.48 to 11.57 for the NT and exhibited an approximately inverse trend to V and Fr over the course of the rainfall events. Compared with the NT, the mean sediment yield rates from the IT increased the dynamic range of 8.34–16.21% among the different rainfall patterns. The net contributions of the IT ranged from 2.77% to 46.39% in terms of surface runoff and 10.14–78.95% in terms of sediment yield on sloping farmland. The surface runoff and sediment yield were positively correlated with rainfall intensity, V, and Fr, but negatively correlated with f irrespective of tillage operation (p < 0.05). The results showed that the tillage erosion effects on soil and water loss were closely related to rainfall patterns in hilly agricultural landscapes. Our study not only sheds light on the mechanism of tillage erosion and rainfall erosion but also provides useful insights for developing tillage water erosion prediction models to evaluate soil and water loss on cultivated hillslopes.

show abstract

Section: Study Sites and Experimental Designmentioning

confidence: 99%

Laboratory-Scaled Investigation into Combined Impacts of Temporal Rainfall Patterns and Intensive Tillage on Soil and Water Loss

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Intense tillage erosion in the hilly areas of the Sichuan Basin often result in shallow soil depths, and in some cases, bedrock is even exposed on the summits of agricultural land. Previous literature based on field investigations has revealed that the soil profile at the upslope boundary has completely disappeared, leading to bedrock exposure due to intensive tillage [17,21,22]. Based on field surveys and previous studies, we covered a piece of plastic sheet (1 m long and 2 m wide) in the soil surface of one steel tank at the summit position (1−2 m) to simulate bedrock exposure, this scenario represented the intensive tillage erosion treatment (IT), and erosion rate reached 129.60 Mg ha −1 .…”

Section: Study Sites and Experimental Designmentioning

confidence: 99%

Combined Impacts of Rainfall Patterns and Intensive Tillage Erosion on Soil and Water Loss in a Simulated Tillage-Eroded Area

Wang¹,

Jin²,

Wang³

et al. 2023

Preprint

View full text Add to dashboard Cite

Many studies have focused on the impacts of rainfall duration and intensity while overlooking the role of rainfall patterns on intensive tillage erosion in hilly agricultural landscapes. The objective of this study was to determine the combined effects of rainfall patterns and intensive tillage erosion on surface runoff and soil loss on sloping farmland in the purple-soil area of China. Five simulated rainfall patterns (constant, rising, falling, rising-falling, and falling-rising) with the same total precipitation were designed, and the intensive tillage erosion treatment (IT) and no-tillage treatment (NT) were subjected to simulated rainfall using rectangular steel tanks (2 m × 5 m) with a slope of 15°. To analyse the differences in the hydrodynamic characteristics induced by tillage erosion, we calculated the flow velocity (V), Reynolds number (Re), Froude number (Fr), and Darcy-Weisbach resistance coefficient (f). The results indicate that significant differences in surface runoff and soil loss were found among different rainfall patterns and stages (P < 0.05). The falling pattern and falling-rising pattern had faster runoff-initiating times and larger sediment yields than those of the other rainfall patterns. f varied from 0.30 to 9.05 for the IT and 0.48 to 11.57 for the NT and exhibited an approximately inverse trend to V and Fr over the course of the rainfall events. Compared with the NT, the mean sediment yield rates from the IT increased the dynamic range of 8.34%–16.21% among different rainfall patterns. The net contributions of the IT ranged from 2.77% to 46.39% on surface runoff and 10.14%–78.95% on soil loss on sloping farmland. Surface runoff and soil loss were positively correlated with rainfall intensity, V, and Fr but negatively correlated with f irrespective of tillage intensive (P < 0.05). For varying-intensity rainfall patterns, soil and water loss fluctuated during rainfall events, suggesting that the changes in rainfall intensity and tillage intensity would result in drastic variations in soil hydrological characteristics and sediment transport mechanisms. The time sequences of rainfall intensity in each rainfall pattern significantly affected surface runoff, soil erosion, and their contribution rates to total soil and water loss. Moreover, tillage erosion effects on soil and water loss were closely related to rainfall patterns in hilly agricultural landscapes. Our study not only sheds light on the mechanism of tillage erosion and rainfall erosion but also provides useful insights for developing tillage-water erosion prediction models to evaluate soil and water loss on cultivated hillslopes.

show abstract

“…This structure was also identified in both temperate and tropical areas, where it is called the stone line or stone zones and characterized by a greater proportion of rock fragments relative to the described horizons above and below them (e.g.,Mercader et al, 2002;Poesen & Lavee, 1994). However, previous studies have paid limited attention to the role of subsurface rock fragments in erosion runoff processes due to their indirect involvement in these surface processes(Fox & Willson, 2010;Katra et al, 2008;Smets et al, 2011).For this pattern, buried coarse particle rock fragments in the soil were reported to primarily affect soil stability and erosion processes by influencing soil physical properties and runoff distribution before being exposed to the slope surface(Basset et al, 2023;Dai et al, 2023;Deng et al, 2018;Fan et al, 2023;Naseri et al, 2019;Zhou et al, 2009). Some rock fragments underlying this type of soil may passively move (migrate upwards or become exposed) during erosion(Cochrane et al, 2019;Sharmeen & Willgoose, 2007).…”

mentioning

confidence: 99%

“….1.3 | Rock fragments lying below topsoil Soils with rock fragments lying below topsoil are often characterized as layered soil or thin soil layers with underlaying rock fragments and typically exhibit distinct bedding structures or sorting characteristics, which can be commonly observed in sedimentary soils resulting from river alluvial deposits and residual soils with broken bedrock(Dai et al, 2023;Deng et al, 2018;Fan et al, 2023;Nyssen et al, 2002;Sohrt et al, 2014). This structure was also identified in both temperate and tropical areas, where it is called the stone line or stone zones and characterized by a greater proportion of rock fragments relative to the described horizons above and below them (e.g.,Mercader et al, 2002;Poesen & Lavee, 1994).…”

mentioning

confidence: 99%

“…Meanwhile, the actual effective soil stress is affected by the physical interactions between soil particles due to the influence of water content(Deng et al, 2018;Jomaa et al, 2013;Schnellmann et al, 2013;Tao et al, 2020;Wei et al, 2019;Zou et al, 2022). Under continuous rainfall conditions, the increase in soil water content will significantly diminish soil friction, shear strength and stability, triggering mass movement, headwall retreat, and collapse(Duan et al, 2021;Fox & Willson, 2010;Horn, 2003;Rachman et al, 2003;Stefano et al, 2013;Wei et al, 2019;Wuddivira et al, 2013).On the other hand, coarse-textured layers can even generate rapid macropore flows (preferential flows) in certain instances due to developed weathering cracks, creating preferential flow pathways and abundant lateral seepage(Dai et al, 2023;Jarvis, 2010;Onda et al, 2004;Tao et al, 2020). These subsurface flows in the lower layers can lead to rapid seepage and pipe erosion(Appels et al, 2016;Wilson, 2011;Wilson et al, 2008), causing transportable fine particles to transport from the soil body through these processes, while only the coarse particles are retained as the soil structural framework (Moret-Fernández & González-Cebollada, 2009), which can cause soil…”

mentioning

confidence: 99%

See 1 more Smart Citation

A review of impacts of soil rock fragments on slope erosion: Mechanism and processes

Ni,

Shi,

Zhao

et al. 2024

Land Degrad Dev

View full text Add to dashboard Cite

Rock fragments play a pivotal role in influencing slope erosion processes, attracting increasing scientific interest and growing concerns regarding their potential impacts on erosion. This paper reviews the studies published in recent decades concerning the various impacts of rock fragments on soil erosion processes by water, highlighting the research gaps and outstanding challenges in exploring the erosion evolution process involving rock fragments. Systematic studies and illustrative examples have shown that the impacts of rock fragments characteristics (such as coverage, content, size, position, shape, and spatial heterogeneity) on erosion processes are complex and inconsistent (positive/negative). This uncertainty can be attributed to the intricate erosion process and the diverse rock fragment characteristics, complicating the development of accurate erosion prediction models. Current models predominantly focus on rock cover and often ignore the essential factors including rock size, position, and shape, thus impeding the precise understanding of how rock fragment characteristics specifically affect soil erosion within existing erosion models. Furthermore, this review discusses the perspectives for enhancing the research on rock fragment impacts on soil erosion processes and provides insights into potential research requirements and solutions.

show abstract

Effects of subsurface rock fragment layers caused by simulated hoeing on near-surface rainfall-runoff processes

Cited by 7 publications

References 47 publications

Laboratory-Scaled Investigation into Combined Impacts of Temporal Rainfall Patterns and Intensive Tillage on Soil and Water Loss

Laboratory-Scaled Investigation into Combined Impacts of Temporal Rainfall Patterns and Intensive Tillage on Soil and Water Loss

Combined Impacts of Rainfall Patterns and Intensive Tillage Erosion on Soil and Water Loss in a Simulated Tillage-Eroded Area

A review of impacts of soil rock fragments on slope erosion: Mechanism and processes

Contact Info

Product

Resources

About