Identifying Human-Induced Spatial Differences of Soil Erosion Change in a Hilly Red Soil Region of Southern China

Soil erosion (SE) processes are closely related to natural conditions and human activities, posing a threat to environment and society. Identifying the human impact on regional SE changes is increasingly essential for pertinent SE management. Jiangxi province is studied here as a representative area of hilly-red-soil regions within southern China. The main objectives of this study were to investigate the changing trend of SE within Jiangxi and identify human impacts on regional SE change from the perspective of spatial differences, through a new approach based on a gravity-center model. Our results showed that SE status presented an overall amelioration from 1990 to 2015, while the average soil erosion modulus (SEM) declined from 864 to 281 Mg/(km2·a). Compared to the situation under human and natural impacts, human-induced spatial differences of SE change demonstrated that the western and northwest regions showed stronger negative effects; the southern region shifted towards negative effects; the northeast region presented a much weaker negative effect. Our results indicated that 4 cities with strong negative effects need more attention in further SE management suited to their local conditions and development, and also suggested that the approach based on a gravity-center has potential for identifying the human impact on regional SE change from the perspective of spatial patterns.

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Soil Erosion and Nutrient Cycling on Sloping Upland Ecosystems of Red Soil in Southern China

Soil Erosion and Dryland Farming ◽

10.1201/9781482274523-30 ◽

2000 ◽

pp. 219-232

Keyword(s):

Soil Erosion ◽

Nutrient Cycling ◽

Southern China ◽

Red Soil

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Effects of Land Use and Slope Gradient on Soil Erosion in a Red Soil Hilly Watershed of Southern China

Sustainability ◽

10.3390/su71014309 ◽

2015 ◽

Vol 7 (10) ◽

pp. 14309-14325 ◽

Cited By ~ 28

Author(s):

Zhanyu Zhang ◽

Liting Sheng ◽

Jie Yang ◽

Xiao-An Chen ◽

Lili Kong ◽

...

Keyword(s):

Land Use ◽

Soil Erosion ◽

Southern China ◽

Red Soil ◽

Slope Gradient ◽

Hilly Watershed ◽

Effects Of Land Use

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A Remote Sensing Based Method to Detect Soil Erosion in Forests

Remote Sensing ◽

10.3390/rs11050513 ◽

2019 ◽

Vol 11 (5) ◽

pp. 513 ◽

Cited By ~ 4

Author(s):

Hanqiu Xu ◽

Xiujuan Hu ◽

Huade Guan ◽

Bobo Zhang ◽

Meiya Wang ◽

...

Keyword(s):

Remote Sensing ◽

Soil Erosion ◽

Soil Loss ◽

Southern China ◽

Red Soil ◽

Forest Area ◽

Landsat 8 ◽

Large Spatial Scale ◽

Five Factors

Rainwater-induced soil erosion occurring in the forest is a special phenomenon of soil erosion in many red soil areas. Detection of such soil erosion is essential for developing land management to reduce soil loss in areas including southern China and other red soil regions of the world. Remotely sensed canopy cover is often used to determine the potential of soil erosion over a large spatial scale, which, however, becomes less useful in forest areas. This study proposes a new remote sensing method to detect soil erosion under forest canopy and presents a case study in a forest area in southern China. Five factors that are closely related to soil erosion in forest were used as discriminators to develop the model. These factors include fractional vegetation coverage, nitrogen reflectance index, yellow leaf index, bare soil index and slope. They quantitatively represent vegetation density, vegetation health status, soil exposure intensity and terrain steepness that are considered relevant to forest soil erosion. These five factors can all be derived from remote sensing imagery based on related thematic indices or algorithms. The five factors were integrated to create the soil erosion under forest model (SEUFM) through Principal Components Analysis (PCA) or a multiplication method. The case study in the forest area in Changting County of southern China with a Landsat 8 image shows that the first principal component-based SEUFM achieves an overall accuracy close to 90%, while the multiplication-based model reaches 81%. The detected locations of soil erosion in forest provide the target areas to be managed from further soil loss. The proposed method provides a tool to understand more about soil erosion in forested areas where soil erosion is usually not considered an issue. Therefore, the method is useful for soil conservation in forest.

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Response of functional traits of Dicranopteris dichotoma leaves to soil factors in different vegetation restoration years in red soil erosion area of Southern China

Acta Ecologica Sinica ◽

10.5846/stxb201810272320 ◽

2020 ◽

Vol 40 (3) ◽

Author(s):

王敬哲 WANG Jingzhe ◽

陈志强 CHEN Zhiqiang ◽

陈志彪 CHEN Zhibiao ◽

潘宗涛 PAN Zongtao

Keyword(s):

Soil Erosion ◽

Functional Traits ◽

Southern China ◽

Red Soil ◽

Vegetation Restoration ◽

Soil Factors ◽

Erosion Area ◽

Dicranopteris Dichotoma

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The potential for soil erosion control associated with socio-economic development in the hilly red soil region, southern China

CATENA ◽

10.1016/j.catena.2020.104678 ◽

2020 ◽

Vol 194 ◽

pp. 104678 ◽

Cited By ~ 4

Author(s):

L. Wang ◽

H. Yan ◽

X.W. Wang ◽

Z. Wang ◽

S.X. Yu ◽

...

Keyword(s):

Economic Development ◽

Soil Erosion ◽

Southern China ◽

Erosion Control ◽

Red Soil ◽

Hilly Red Soil Region ◽

Soil Erosion Control ◽

Socio Economic Development

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Estimating Medium-Term Soil Erosion Rates under Different Types of Land Use in Red Soil Region of Jiangxi, Southern China Using 137Cs Technique

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.4716 ◽

2012 ◽

Vol 518-523 ◽

pp. 4716-4720 ◽

Cited By ~ 1

Author(s):

Ming Li Zhang ◽

Ming Gao ◽

Biao Xie ◽

Hao Yang

Keyword(s):

Land Use ◽

Soil Erosion ◽

Southern China ◽

Red Soil ◽

Medium Term ◽

Erosion Rates ◽

Soil Erosion Rate ◽

Bare Land ◽

Type Of Land Use ◽

Upper Slope

Soil erosion has been recognized as one of the major environmental problem in red soil region of southern China. The spatial variation of soil erosion was studied using 137Cs technique at three sites (site A, site B, site C) under different type of land use in Jiangxi province. To understand the spatial distribution of soil erosion is important for taking proper soil and water conservation measures. 280 samples were collected at three sites. Medium-term average soil erosion rates estimated for dry farmland is 83.1 kg ha-1 a-1 at site A, and that for paddy fields with terraces on the middle-lower slope is 79.2 kg ha-1 a-1 at site B. Among the uncultivated lands, the average soil erosion rate of bare land is 3700 kg ha-1 a-1 on the upper slope at site A, that of woodland covered with masson pines on the upper slope is 1106 kg ha-1 a-1 at site B and that of economic forest that covered with orchard is 1380.5 kg ha-1 a-1 at site C. On the whole, the soil erosion rate of cultivated land is lower than that of uncultivated land. Bare land, woodland and orchard are the three main sources of soil erosion in red soil region of southern China. Protective measures of cultivated land, such as terraces, field ridge and ditch beside the land, had been demonstrated effectively in controlling soil erosion. The findings provide more information on agricultural land under different type of land use and managed measures which play an important role in controlling the soil loss in Southern China to a certain degree.

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