Soil erosion rates on sloping cropland fragment underlain by contrasting lithologies

Li, Zhaoran; Wu, Tong; Chen, Fangxin; Xu, Mingyang; Wang, Yong; He, Shuqin; Tan, Bo; Hou, Guirong; Luo, Ziteng; Zheng, Jiangkun; Hu, Xun

doi:10.1016/j.catena.2022.106622

Cited by 7 publications

(5 citation statements)

References 50 publications

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“…The parent rock can influence soil properties such as texture, aggregates, and erodibility (Zhang et al, 2023). The effects of vegetation restoration can interact with those of the bedrock and strongly alter the response of vegetation to climate change (Jiang et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Lithology plays a crucial role in vegetation restoration (Caritat et al, 2012; Durr et al, 2005), making it the most significant indicator of environmental factors. Previous studies have demonstrated that the pattern of soil erosion is generally regulated by the underlying lithology (Zhang et al, 2023). There is a close relationship between lithology (soil parent material) as a soil‐forming factor and soil type and agglomeration stability, which influences soil erodibility (Duan et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Rock desertification is a form of land degradation caused by human activities and natural processes, resulting in vegetation degradation and exposure of large areas of bedrock to the surface (Hartmann et al, 2014). Carbonate rocks in the southwestern karst area are soluble, which often results in low soil formation rates, shallow soils, porosity, complex hydrogeology, and low surface hydrological connectivity (Zhang et al, 2023). Moreover, the region exhibits a unique two‐layer hydrogeological structure, both on the surface and underground, creating a fragmented landscape of reclaimed rock and bare rock.…”

Section: Introductionmentioning

confidence: 99%

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Lithology‐mediated soil erodibility characteristics after vegetation restoration in the karst region of Southwest China

Liang,

Wang,

et al. 2023

Land Degrad Dev

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Ecological restoration projects have significantly increased global vegetation cover and reduced soil erosion. However, it is very challenging to clarify the complex soil erosion mechanisms of limestone and dolomite in the southwest karst region and to identify the key factors affecting erosion. The study site has a subtropical monsoon climate with precipitation concentrated during the rainy season from May to September. In this study, four plantation restoration measures with a recovery time of approximately 16 years were selected, which included arbor forest, orchard, grassland, and cropland (control). Soil physical–chemical properties and soil erodibility K values were used to evaluate the soil erosion characteristics. The results showed that both limestone and dolomite exhibited lower soil bulk density as well as higher capillary porosity, and soil water‐stable aggregates after revegetation. The limestone and dolomite K values were reduced by 12%–15% and 15%–17%, respectively. However, the K value of limestone was 17.9% higher than that of dolomite, indicating that dolomite exhibited a higher stability. Through redundancy analysis and structural equation modeling, revegetation was found to reduce soil erosion by influencing the soil particle composition. The silt was the key factor influencing soil erosion, accounting for 84.4% and 78.2% of the variation in the limestone and dolomite K values, respectively. These findings suggest that vegetation restoration enhances soil erosion resistance; however, the effectiveness of restoration is controlled by the lithology in the southwest karst region. These findings provide a reference for soil and water management and vegetation restoration.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lithology‐mediated soil erodibility characteristics after vegetation restoration in the karst region of Southwest China

Liang,

Wang,

et al. 2023

Land Degrad Dev

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“…Due to the presence of poorly cemented calcium-rich and clay rocks in the purple soil parent material, physical weathering of rocks is relatively strong [4]. Therefore, purple soil inherits characteristics from its parent rocks, such as high coarse particle content, low organic matter content, few aggregates, and strong dispersion [4,5]. Moreover, purple soil in in Sichuan Province is predominantly hilly, densely populated, with a long history of cultivation, intensive land use, significant human disturbance, high-intensity rainfall, favorable erosion conditions, and long-term intense cultivation.…”

Section: Introductionmentioning

confidence: 99%

“…These soils have strong erodibility, high rates of soil and water loss, and loose and easily fragmented bedrock material, which, especially in the case of purple bedrock, develops numerous fractures. When the cultivated depths of the soil profiles are smaller than tillage depths applied by farmers, parent materials or mudstone bedrocks would be crushed by tillage operations to retain a certain cultivated depth [5,6,9,12]. The introduction of bedrock fragments into the soil not only promotes its weathering into soil within a relatively short period but also leads to a shorter soil renewal cycle, resulting in significant differences in soil properties compared to the original soil [13].…”

Section: Introductionmentioning

confidence: 99%

Bedrock Fragment Induced by Intensive Tillage Effect on Hydrological Properties and Erosion Processes under Different Rainfall Patterns

Wang,

He,

Zhang

et al. 2023

Agronomy

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To investigate the influence of bedrock fragmentation by intensive tillage on the hydrological characteristics and soil erosion processes on slopes, two experimental treatments (soil–bedrock mixtures, WB, and pure soil, CK) in steel tanks were subjected to simulated rainfall under five rainfall patterns (constant, increasing, decreasing, decreasing–increasing, and increasing–decreasing) with the same total rainfall of 90 mm. For each rainfall event, runoff and sediment concentration were sampled at regular intervals. The flow velocity (v), effective/critical shear stress (τ/τc), Darcy–Weisbach resistance coefficient (f), unit stream power (p), and soil erodibility factor (Kr) were calculated to analyze the differences in hydrodynamic characteristics between the WB and CK. Our experimental findings show that significant differences in runoff volume and sediment yield were observed among different rainfall patterns and stages. Bedrock fragmenting significantly promoted runoff and sediment production under different rainfall patterns, with runoff volume and sediment yield increasing by averages of 59.29% and 71.62%, respectively. An increasing trend in average contribution rate of bedrock to runoff volume and sediment yield was observed across three distinct intensities: 6.37% and 4.61% for 30 mm h−1, 12.53% and 7.53% for 90 mm h−1, as well as 14.79% and 36.98% for 150 mm h−1, respectively. The v and p values under various rainfall patterns exhibited an increasing trend from the upper to the bottom slope positions, whereas the f and τ values showed an opposite trend, regardless of the WB and CK. Compared with the CK, the v, f, and p values for the WB increased by 23.34% to 48.94%, 1.59% to 53.16%, and 3.86% to 27.86%, respectively, whereas the τ value decreased by 1.52% to 22.19% for varying-intensity rainfall patterns. Among the variable rainfall patterns, the WB significantly increased sediment yield and also had a promoting effect on runoff generation. However, the WB displayed better erosion resistance compared to the CK under constant rainfall patterns. Therefore, varied-intensity patterns had a profound impact on bedrock-induced runoff and sediment transport processes.

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Fallout radionuclides (FRNs) for measuring soil erosion in the Himalayan region: A versatile and potent method for steep sloping hilly and mountainous landscapes

Kumar,

David Raj,

Mariappan

2024

CATENA

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Soil erosion rates on sloping cropland fragment underlain by contrasting lithologies

Cited by 7 publications

References 50 publications

Lithology‐mediated soil erodibility characteristics after vegetation restoration in the karst region of Southwest China

Lithology‐mediated soil erodibility characteristics after vegetation restoration in the karst region of Southwest China

Bedrock Fragment Induced by Intensive Tillage Effect on Hydrological Properties and Erosion Processes under Different Rainfall Patterns

Fallout radionuclides (FRNs) for measuring soil erosion in the Himalayan region: A versatile and potent method for steep sloping hilly and mountainous landscapes

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