Modified vegetation-erosion dynamics model and its application in typical watersheds in the Loess Plateau

Chen, Yuehong; Wang, Feixin; Liu, Guangquan; Xiao, Yu; Jia, Guodong; Gan, Ping

doi:10.1016/s1001-6279(11)60077-2

Cited by 14 publications

(8 citation statements)

References 9 publications

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“…Soil in the study area has a poor resistance to soil erosion and it is readily broken. The average annual erosion modulus in the study area is 5,510 t/(km 2 .a; Chen et al, 2011).…”

Section: Experimental Sitementioning

confidence: 96%

Field studies on the influence of rainfall intensity, vegetation cover and slope length on soil moisture infiltration on typical watersheds of the Loess Plateau, China

Jia

Liu

et al. 2020

Hydrological Processes

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Soil moisture is a key process in the hydrological cycle. During ecological restoration of the Loess Plateau, soil moisture status has undergone important changes, and infiltration of soil moisture during precipitation events is a key link affecting water distribution. Our study aims to quantify the effects of vegetation cover, rainfall intensity and slope length on total infiltration and the spatial variation of water flow. Infiltration data from the upper, middle and lower slopes of a bare slope, a natural grassland

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“…Soil in the study area has a poor resistance to soil erosion and it is readily broken. The average annual erosion modulus in the study area is 5,510 t/(km 2 .a; Chen et al, 2011).…”

Section: Experimental Sitementioning

confidence: 96%

Field studies on the influence of rainfall intensity, vegetation cover and slope length on soil moisture infiltration on typical watersheds of the Loess Plateau, China

Jia

Liu

et al. 2020

Hydrological Processes

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“…The density of the gully was 3.54 km/km 2 and the average slope was 18 • [30]. The annual average temperature in this region ranges between 7-11 • C. The annual average precipitation is about 533.7 mm, about 80% of which occur between May and October [31]. In this area, precipitation is predominantly classified as heavy rain, which occurs over a small area, characterized by short duration and high intensity.…”

Section: Study Areamentioning

confidence: 89%

“…The soil in the study area has poor resistance to soil erosion and is readily broken. The average annual erosion modulus in the study area is 5510 t km −2 a −1 [30,31]. The agricultural land accounts for 55.0% of the total area of Luoyugou watershed, natural vegetation is poor, coverage is about 30.0%.…”

Section: Study Areamentioning

confidence: 99%

“…19 species of shrubs mainly including wolfsbane (Sophora viciifolia Honce), purple-fringed locust (Amorpha fruticosa), and pepper (Zanthoxyhum bungeanum Maxim). There are 172 species of her-baceous plants in the legume family, such as alfalfa (Medicago sativa), grass miscanthus (Meli sucuealens Ledeb), lychee (Aeeuro lopidium clasy), white grass (Bothriochia ischaemum) and artemisia [30,31]. Due to the destruction of artificial logging and overgrazing, a large area of barren slope has been formed and cultivated by rotation, and the vegetation is decreasing year by year.…”

Section: Study Areamentioning

confidence: 99%

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A Field Study for the Effects of Grass Cover, Rainfall Intensity and Slope Length on Soil Erosion in the Loess Plateau, China

Xiao

et al. 2022

Water

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Slope length is an important topographic factor for controlling soil erosion. There exists limited knowledge of the interactions of slope length, vegetation restoration, and rainfall intensity on soil erosion. This study investigated the impact of the slope length on soil erosion for different grass coverages and different rainfall intensities via simulated rainfall experiments. The experiments included five rainfall intensity treatments (1, 1.5, 2, 2.5, and 3 mm min−1), four grass cover treatments (0%, 30%, 60%, and 90%), and five slope length treatments (2, 4, 6, 8, and 10 m). The change process of soil loss was significantly different (p < 0.05) for different slope lengths. The trend of soil loss changing with slope length is: under a grass cover of 0 or 30%, the soil erosion increased exponentially with increasing slope length. However, under a grass cover of 60%, the soil erosion rate peaked at a slope length of 8 m, and under a grass cover of 90%, the soil erosion rate peaked at a slope length of 6 m. At rainfall intensities of 1.5–2 mm min−1, the overall soil erosion amount was small. The soil loss increased drastically with slope length when the rainfall intensity exceeded 2 mm min−1. Compared with a slope length of 2 m, longer slope lengths increased the erosion rate by 225–930% under different grass coverages treatments. Regression analysis showed that grass cover and rainfall intensity change the trend of erosion with slope length, and the negative effect of slope length on erosion is strengthened with the increase of grass cover, while this negative effect gradually weakens with the increase of rainfall intensity.

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“…Besides the sediment load, some research about the soil erosion rate directly showed the reduction in soil erosion in the study area after restoration work. Chen et al [66] showed that the rate of soil erosion was more than 4500 t km −2 yr −1 before 1988 in Luoyugou watershed, and that the erosion rate decreased to 4200 t km −2 yr −1 in 1988 and 3520 t km −2 yr −1 in 1989, and then it declined to 1630 t km −2 yr −1 in 1990, after which it stayed at a stable level between 1100 and 1800 t km −2 yr −1 from 1991 to 2004. The erosion rate decreased to approximately one third of that in the data before 1988.…”

Section: Discussionmentioning

confidence: 99%

The Effects of Restoration Practices on a Small Watershed in China’s Loess Plateau: A Case Study of the Qiaozigou Watershed

Qinghong

Zhen

2020

Sustainability

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Soil erosion and restoration affect the structure and function of ecosystems and society, and have attracted worldwide attention. Changes in runoff and sediment transport after restoration practices in China’s Loess Plateau have been widely studied and many valuable results have been reported. However, this research was mainly conducted in large watersheds, and quantified the effects of restoration practices through the restoration period. In this study, we compared two adjacent watersheds (one restored and the other natural) in a hill and gully region of China’s Loess Plateau to reveal the impacts of restoration practices. We collected annual rainfall, runoff, and sediment transport data from 1988 to 2018, then investigated temporal variation of runoff and sediment transport to examine their relationships with rainfall. We also calculated the retention rate of soil and water under the restoration practices. The restored watershed showed a significantly decreased sediment modulus (the amount per unit area); the natural watershed showed no significant change. In addition, the restored watershed had lower runoff and sediment modulus values than the natural watershed, with greater effectiveness as rainfall increased. Revegetation and terrace construction contributed more to the retention of soil and water (65.6 and 69.7%, respectively) than check dams (<10%). These results improve our understanding of the effects of restoration practices, and provide guidance on ways to preserve soil and water through restoration in a small watershed in the Loess Plateau.

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Modified vegetation-erosion dynamics model and its application in typical watersheds in the Loess Plateau

Cited by 14 publications

References 9 publications

Field studies on the influence of rainfall intensity, vegetation cover and slope length on soil moisture infiltration on typical watersheds of the Loess Plateau, China

Field studies on the influence of rainfall intensity, vegetation cover and slope length on soil moisture infiltration on typical watersheds of the Loess Plateau, China

A Field Study for the Effects of Grass Cover, Rainfall Intensity and Slope Length on Soil Erosion in the Loess Plateau, China

The Effects of Restoration Practices on a Small Watershed in China’s Loess Plateau: A Case Study of the Qiaozigou Watershed

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