Effect of Land Use Change on Gully Erosion Density in the Black Soil Region of Northeast China From 1965 to 2015: A Case Study of the Kedong County

Li, Maojuan; Li, Tianqi; Zhu, Lianqi; Meadows, Michael E.; Zhu, Wenbo; Zhang, Shuwen

doi:10.3389/fenvs.2021.652933

Cited by 15 publications

(8 citation statements)

References 64 publications

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“…The slope erosion amount and gully density of cultivated land are 625.01 t/km 2 •a and 0.06 km/km 2 larger than that of the forestland, respectively. The low hills that constitute a large proportion of the study area, along with the central plains, contain much cultivated land with low vegetation coverage and the highest level of human activities in the region, leading to the most intensive soil erosion, which was consistent with the results of Li et al (2019) and Jia et al (2019). Forestlands have high vegetation coverage, but are mostly found in areas with steep slopes.…”

Section: Resultssupporting

confidence: 89%

The coupling of hillslope- and gully-erosion increases their controlling efforts: A case study in Liaoning Province, China

Fan¹,

Fan²,

Dong³

2022

Soil & Water Res.

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The widespread hillslope- and gully-erosion in Liaoning Province of Northeast China, pose serious challenges to the local agricultural production. Hillslope- and gully-erosion have typically been studied separately; however, there has been little investigation on the relationship of these two types of erosion. In this study, the coupling relationship of the hillslope- and gully-erosion from the perspectives of erosion intensity and land use, as well as the slope gradient, aspect, and shape, was analysed. The study employed remote sensing and geographic information system techniques, and the universal soil loss equation and kriging were used to perform a macroscopic analysis. The results showed that gully-erosion was more severe compared with hillslope-erosion in the study area. The cultivated land has the highest level of human activities, therefore, the most intense hillslope- and gully-erosion. The threshold slope gradients for the hillslope- and gully-erosion are 14° and 6°, respectively. Above the threshold of 6°, the slope gradient is no longer the primary factor affecting the gully-erosion. Sunny slopes have observably more hillslope-erosion than shady slopes, and the highest hillslope-erosion is observed on the south-southeast-facing slopes. The effect of the slope aspect on the gully-erosion should not be ignored, as evidenced by the considerable gully density of the east-northeast-facing slopes which is obviously higher than for slopes with other slope aspects. The highest hillslope-erosion amount and gully density occur on concave slopes, followed by convex and straight slopes, and straight slopes have little effect on the hillslope-erosion, but have a marked impact on the gully-erosion. The results of this work may serve as a scientific reference for the comprehensive control of soil erosion across a slope-gully system in Northeast China.

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Section: Resultssupporting

confidence: 89%

The coupling of hillslope- and gully-erosion increases their controlling efforts: A case study in Liaoning Province, China

Fan¹,

Fan²,

Dong³

2022

Soil & Water Res.

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“…Among them, cultivated land has the greatest impact, which may be due to the frequent human activities on cultivated land. This result is consistent with some previous studies [50,51]. For example, the results of Ali Azareh et al's study in 2019 showed that slope aspect, lithology, and land use were identified as the most important factors affecting gully sensitivity in Iran by using a maximum entropy model [3].…”

Section: Analysis Of Controlling Factors Of Gully Erosionsupporting

confidence: 91%

Quantitative Attribution Analysis of the Spatial Differentiation of Gully Erosion in the Black Soil Region of Northeast China

Wang

Fan

et al. 2022

Geofluids

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Gully erosion is the major soil erosion type in the black soil region of Northeast China. However, studies on multifactor synthesis at a large scale and on the driving mechanism of spatial differentiation are still relatively lacking for gully erosion in this region. In this study, the simulation of gully erosion and its quantitative attribution analysis have been conducted in the Sancha River catchment in Northeast China, based on high-resolution satellite imagery mapping and the geodetector method. A total of 18 indicators in 6 categories, including topography, climate and weather, soil properties, lithology, land use, have been taken into consideration. The influence of each influencing factor and its interactive influence on gully erosion were quantitatively evaluated. The results showed that at the large catchment scale, the submeter images had a strong capacity for the recognition of a permanent gully and obtained satisfactory results. According to the results of the geodetector, lithology and soil type are the main factors that affect the spatial differentiation of gully erosion in the Sancha River basin, because their interpretation power for gully density and gully intensity was close to 10%. The lithology belonged to gray–white matter rhyolite, spherulite rhyolite, and crystal clastic tuff, with the highest gully density and intensity. The interpretation power of the secondary factors, including rainfall erosivity, watershed area, elevation, soil erodibility, land use pattern, slope, and distance from the river, amounted to more than 1%. The interactions among most driving factors showed nonlinear enhancement. The influence of the interaction between lithology and soil type appeared to be the largest. In particular, the lithology of different soil types accounted for 28.7% and 32.5% of the gully density and gully intensity. The interaction of factors had a stronger influence on the spatial differentiation of gully erosion than any single factor.

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“…Gully erosion on the plains was mostly a result of the long gentle slopes gathering a large amount of water, which led to the development of a large number of gullies. The plains had fertile soils and many agricultural areas [ 53 ], so much of the gully erosion was affected by human activity [ 54 ]. The geology, soil, rainfall, hydrology, vegetation and human activities and their interactions all affected gully erosion irrespective of the topography and will therefore be the focus of future studies.…”

Section: Discussionmentioning

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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Effect of Land Use Change on Gully Erosion Density in the Black Soil Region of Northeast China From 1965 to 2015: A Case Study of the Kedong County

Cited by 15 publications

References 64 publications

The coupling of hillslope- and gully-erosion increases their controlling efforts: A case study in Liaoning Province, China

The coupling of hillslope- and gully-erosion increases their controlling efforts: A case study in Liaoning Province, China

Quantitative Attribution Analysis of the Spatial Differentiation of Gully Erosion in the Black Soil Region of Northeast China

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

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