Simulation of the effects of level bench terraces on water erosion reduction in the Loess Plateau based on the WEPP model

Kemeng, 任柯蒙 Ren; Wei, 卫伟 Wei; Xining, 赵西宁 Zhao; Tianjiao, 冯天骄 Feng; Die, 陈蝶 Chen

doi:10.5846/stxb201707151285

Cited by 2 publications

(2 citation statements)

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“…Therefore, the combination of vegetation plays a key role. For example, the reasonable ratio of rigid and flexible vegetation showed a significant effect in controlling soil erosion, where soil loss on the slope was minimized when the ratio of rigid and flexible vegetation was 1:2 [44]. The results of this study showed that in the process of runoff flow through the slope, as the flow rate increased, the slope runoff flow rate increased more and more slowly, in which the bare slope and the upstream rigid-downstream flexible flow rate were the highest, followed by the combination of double-row staggered and single-row staggered modes.…”

Section: Effect Of Rigid and Flexible Vegetation On The Hydraulic Cha...mentioning

confidence: 99%

Research on the Impact of Using a Combination of Rigid and Flexible Vegetation on Slope Hydrological Properties in Loess Regions

Tao,

Wang,

Shi

et al. 2024

Water

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Slope vegetation is a key component of soil erosion control. Rigid vegetation improves slope stability, while flexible vegetation reduces water velocity, and the combination of both improves erosion resistance; however, there are few studies on how the combination of rigid and flexible vegetation affects the hydraulic characteristics of slope flow. In order to investigate the effect of this combination on the hydraulic characteristics of slopes, a mathematical model of the coefficient of resistance under the cover of rigid–flexible vegetation was established by using theoretical analysis and indoor tests, and the indoor tests were conducted with different rigid–flexible vegetation combinations (single-row interlocking (IS), double-row interlocking (IT), upstream rigid–downstream flexible (RF), and bare slope (BS)). The results showed that the rigid–flexible vegetation combination had a significant effect on the slope water flow. With the increase in flow, the water depth and flow velocity of slope flow showed an increasing trend, the flow velocity of the bare slope was significantly larger than that of the vegetation-covered slope, and the value of the water depth increment of the vegetation-covered slope was 0.086~0.22 times that of the bare slope. The Reynolds number showed a good linear increasing relationship with flow rate, and with the gradual increase in flow rate and slope, the flow pattern gradually changed from slow flow to fast flow. When the slope was 2°, the drag coefficient increased and then decreased. The pattern of erosion reduction capacity was IS > RF > IT > BS. The results of this study provide strong theoretical support for understanding the mechanism of vegetation-controlled erosion and provide scientific guidance for optimizing vegetation design in the Loess Plateau region.

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Section: Effect Of Rigid and Flexible Vegetation On The Hydraulic Cha...mentioning

confidence: 99%

Research on the Impact of Using a Combination of Rigid and Flexible Vegetation on Slope Hydrological Properties in Loess Regions

Tao,

Wang,

Shi

et al. 2024

Water

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“…Field experiments by Liu Gang et al [25] revealed that the erosion control efficiency of upslope drainage technique in loess stairstep cut slopes was better than vegetation planting and deploying reverse slope and could achieve the balance between erosion control efficiency and cost. Several studies on contour reverse slope terrace have shown that it can not only effectively reduce surface runoff, sediment, and nutrient loss [26][27][28] but also improve the physiochemical properties and enzyme activity of soil [29,30]. While most of the studies on contour reverse slope terrace have focused on red soil areas in Yunnan province, loess plateau areas, and northern soil and rocky mountain areas [31], there are few reports on its application and experiments in karst areas.…”

Section: Introductionmentioning

confidence: 99%

Soil and Water Conservation Effects of Contour Reverse Slope Terraces on Red Clay Sloping Farmland against Short and Heavy Rainfall

Huang

Liu

2023

Geofluids

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To explore the effect and applicability of contour reverse slope terraces in water and soil conservation of karstic red clay soil area in northern Guangxi, rainfall simulation experiments were conducted on bare red clay soil slopes laid with contour reverse slope terraces to find the erosion pattern in response to different rainfall intensities (15, 30, and 50 mm/h) and bedrock porosities (1%, 3%, and 5%). The results showed that contour reverse slope terraces can change the spatial distribution of surface runoff, divert surface runoff to the underground, and increase underground sediment yielding. It is found that contour reverse slope terraces can effectively reduce surface soil erosion though it still remains dominant erosion for red clay terraced farmland, with surface runoff reduced by 71%, 52%, and 46% and surface sediment loss reduced by 70%, 65%, and 63%, respectively, when the rainfall intensity is set at 15 mm/h, 30 mm/h, and 50 mm/h. It is concluded that contour reverse slope terraces can help reduce water and soil erosion of red clay terraced farmland in northern Guangxi.

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Simulation of the effects of level bench terraces on water erosion reduction in the Loess Plateau based on the WEPP model

Cited by 2 publications

References 0 publications

Research on the Impact of Using a Combination of Rigid and Flexible Vegetation on Slope Hydrological Properties in Loess Regions

Research on the Impact of Using a Combination of Rigid and Flexible Vegetation on Slope Hydrological Properties in Loess Regions

Soil and Water Conservation Effects of Contour Reverse Slope Terraces on Red Clay Sloping Farmland against Short and Heavy Rainfall

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