Annual variation of ephemeral gully erosion in a cultivated catchment

Jie, Tang; Liu, Gang; Xie, Yonghong; Dun, Xingwu; Wang, Daan; Zhang, Shuai

doi:10.1016/j.geoderma.2021.115166

Cited by 14 publications

(10 citation statements)

References 56 publications

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“…The combined influence of hydrology and topography affects soil stability by reducing the shear strength and soil anti-erodibility [ 25 ]. The influence of topography on the development of gullies is reflected in the slope length, slope gradient and catchment area [ 26 ]. Slope length provides sufficient runoff for the development of the gullies, indirectly enhancing the erosive power of water.…”

Section: Introductionmentioning

confidence: 99%

Influence of Topographic Factors on the Characteristics of Gully Systems in Mountainous Areas of Ningnan Dry-Hot Valley, SW China

Cen

Zhang

Luo

et al. 2022

IJERPH

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A gully system is an important indicator that reflects the development of regional topography and landforms, and topography is one of the most important factors affecting the development of gullies. However, at present, research on the impact of topography on the development of gully systems in the mountainous area of Ningnan dry-hot valley still needs to be strengthened. In order to study the characteristics of gullies and the influence of topography on the development of gully systems, based on both the visual interpretation of remote sensing images and field investigations, five topographic factors (elevation, slope gradient, aspect, relief, and dissection) were employed and three gully erosion indexes (gully length, density, and frequency) were calculated. The geographical information system was used in this study to carry out the spatial analysis, Ward’s hierarchical clustering and correlation analysis. Results showed that the development of gully systems is greatly affected by the degree of relief and dissection, and there is a significant positive correlation (p < 0.01; p < 0.05), while elevation, slope gradient and aspect have little influence on it. Analysis of the gully systems showed that the gully erosion is the most intense in the area with an elevation of 2800–3200 m and slope gradients ≥ 38°. Furthermore, the degree of erosion on shady slopes was greater than that on sunny slopes. These results will help us to understand the spatial distribution and formation of gully systems in mountainous areas.

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Section: Introductionmentioning

confidence: 99%

Influence of Topographic Factors on the Characteristics of Gully Systems in Mountainous Areas of Ningnan Dry-Hot Valley, SW China

Cen

Zhang

Luo

et al. 2022

IJERPH

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“…The reason for this was that runoff in up and down slope tillage farmland was separated by the ridges and hence flowed along the rows to the bottom, which decreased the runoff amount and energy in any given flow path. Tang, Liu, Yun, et al (2021) found that ephemeral gullies do not easily form on areas that are cultivated up and down the slope, and only appear at the bottom of the slope during heavy rainfall. However, when they do form the gully head may rapidly retreat up the slope from the bottom of the slope during a heavy rainfall, because more upstream runoff accumulates at the slope foot.…”

Section: Influences Of Tillage On Gully Erosionmentioning

confidence: 99%

“…Although tillage practice and land use/land management affected gully erosion (Tang, Liu, Xie, et al, 2021;Tang, Liu, Yun, et al,…”

Section: Contribution Of Topographic Indices On Gully Erosionmentioning

confidence: 99%

“…Tillage operations are an essential agricultural activity on farmland, which change surficial roughness and impact runoff patterns (Takken et al, 2001; Álvarez‐Mozos et al, 2011). Surface features in farmland, such as furrow direction, farm roads and crop types, will also affect the erosion rate (Poesen, 2011; Tang, Liu, Yun, et al, 2021). Zhang et al (2007) observed that development of the gullies was affected by tractor traffic and the type of agricultural operations and crops.…”

Section: Introductionmentioning

confidence: 99%

“…Cross slope farming is similar with contour farming, but has a greater angle between ridges and elevation contours. We cannot ensure that the angle accurately equaled to 0 or 90 in the real world, so we defined the farmland with a row angle less than 20 as contoured ridge tillage area, the farmland with a row angle between 20 and 70 as cross slope ridge tillage area, and the farmland with a row angle greater than F I G U R E 2 A spatial representation of the sample unit selected [Colour figure can be viewed at wileyonlinelibrary.com] 70 as longitudinal ridge tillage area (refer toTang, Liu, Yun, et al, 2021).…”

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confidence: 99%

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Effect of topographic variations and tillage methods on gully erosion in the black soil region: A case‐study from Northeast China

et al. 2022

Self Cite

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Gully erosion is considered to be a severe land degradation process around the world. The combined effects of tillage methods and topographic variation on gully erosion are poorly understood. This study investigated permanent gullies in three farmland, geomorphic areas in the black soil region of Northeastern China: low mountains and hills, tableland, and rolling hill areas. Cross-sectional measurements were used to obtain estimates of volumetric soil loss from the gullies. Digital contour maps and remote sensing images were used to obtain the topography and row direction data. The results showed that tableland area had the greatest volumetric soil loss and was the most prone to develop gully erosion, followed by the low mountains and hills, and finally the rolling hill areas. Topography was the dominant control on gully erosion and volumetric soil loss and length density increased first and then decreased as a function of increase of slope gradient. Farmland with slope gradient between 15 and 20 had the most serious gully erosion. Hillslope gullies were classified into three types by morphological indicators. Compared to other geomorphic areas, low mountains and hills had the most gully types and the greatest variability of morphology. Surface areas and volumes were related to gully type. Different tillage methods have affected the frequency of gully occurrence. Cross-slope tillage areas were more prone to develop gully erosion than contoured tillage and up and down slope tillage areas, especially for farmlands with slope of 5 to 10 . The results suggest that gully erosion could be reduced if up and down slope tillage was used for slope gradients less than 15 and contoured tillage was used for slope gradient greater than 15 . This study demonstrates the combined effect of topographic variations and tillage methods on gully erosion, and highlights the importance of considering different tillage methods under different geographical conditions to control gully erosion.

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Soil erosion‐induced decline in aggregate stability and soil organic carbon reduces aggregate‐associated microbial diversity and multifunctionality of agricultural slope in the Mollisol region

Yang,

Peng,

et al. 2024

Land Degrad Dev

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Soil erosion has become a serious ecological problem hindering the agricultural and economic development in Northeast China. Soil aggregates are basic units that regulate soil fertility and microbial activity. However, there have been few reports on the role of soil erosion in regulating the microbial diversity, multiple ecosystem services, and functions (multifunctionality) of soil aggregates. In this study, we investigated the effects of soil erosion on microbial diversity and the activities of various extracellular enzymes associated with soil aggregates by using Mollisol soil in Northeastern China at different positions of a slope, and how soil erosion affects soil multifunctionality indexes obtained by normalized calculation of soil enzyme activities. The results showed that soil erosion could reduce the physicochemical properties, soil enzyme activity, and microbial diversity of the aggregates, resulting in accumulation of aggregate nutrients and increase in microbial diversity and enzyme activity in the sedimentation area. Compared with smaller soil aggregates, larger soil aggregates had higher nutrient content, enzyme activity, and microbial diversity. However, with the intensification of soil erosion, the differences in microbial diversity and soil enzyme activities among different sizes of aggregates were reduced. Soil erosion also significantly reduced soil multifunctionality (p < 0.001). The multifunctionality of 2000–250 μm, 250–53 μm, and <53 μm aggregates respectively declined from 0.52, 0.20, and 0.08 (no erosion sites) to −0.17, −0.66, and −0.77 (heavy erosion sites). Additionally, microbial diversity was found to have a linear positive correlation with soil multifunctionality (R2 = 0.23, p < 0.01). Structural equation modeling and random forest analysis revealed that soil organic carbon and aggregate water stability are main predictors of soil multifunctionality. Furthermore, soil physicochemical properties had a greater influence on soil multifunctionality than microbial diversity. Collectively, our results demonstrate that soil erosion negatively affects the structure, resource effectiveness, and microbial activity of soil aggregates, thereby reducing to differential soil multifunctionality.

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Annual variation of ephemeral gully erosion in a cultivated catchment

Cited by 14 publications

References 56 publications

Influence of Topographic Factors on the Characteristics of Gully Systems in Mountainous Areas of Ningnan Dry-Hot Valley, SW China

Influence of Topographic Factors on the Characteristics of Gully Systems in Mountainous Areas of Ningnan Dry-Hot Valley, SW China

Effect of topographic variations and tillage methods on gully erosion in the black soil region: A case‐study from Northeast China

Soil erosion‐induced decline in aggregate stability and soil organic carbon reduces aggregate‐associated microbial diversity and multifunctionality of agricultural slope in the Mollisol region

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