The dynamic effects of pastures and crop on runoff and sediments reduction at loess slopes under simulated rainfall conditions

Zhao, Xining; Huang, Jun; Wu, Pute

doi:10.1016/j.catena.2014.03.001

Cited by 70 publications

(33 citation statements)

References 25 publications

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“…Among the three forage species, M. sativa performed the best in retaining flow and reducing soil loss. These results are in accordance with those studies conducted in similar loess areas (Wu, Wu, Feng, & Merkley, ; Zhao et al, ). Wu et al () used overland flow simulation experiments with the inflow rate corresponding to rainfall intensity ranging from 30 to 105 mm hr −1 and found that M. sativa reduced runoff and sediment yield by 28 and 78%, respectively.…”

Section: Discussionsupporting

confidence: 93%

“…However, relatively few studies have been conducted to examine the effects of forages on controlling runoff and erosion on steep slopes (>25°) (Duan et al, ; Li & Pan, ; Pan et al, ; Pan et al, ). In addition, the majority of previous studies were conducted under laboratory conditions with a small‐size flume or a bin (Pan et al, ; Zhao, Huang, Wu, & Gao, ). Fewer rainfall simulation studies have been conducted in the field with natural grass and steep slopes (Duan et al, ; Li et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Overland runoff erosion dynamics on steep slopes with forages under field simulated rainfall and inflow

Pan

2020

Hydrological Processes

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Although numerous studies have acknowledged that vegetation can reduce erosion, few process-based studies have examined how vegetation cover affect runoff hydraulics and erosion processes. We present field observations of overland flow hydraulics using rainfall simulations in a typical semiarid area in China. Field plots (5 × 2 m 2 ) were constructed on a loess hillslope (25 ), including bare soil plot as control and three plots with planted forage species as treatments-Astragalus adsurgens, Medicago sativa and Cosmos bipinnatus. Both simulated rainfall and simulated rainfall + inflow were applied. Forages reduced soil loss by 55-85% and decreased overland flow rate by 12-37%. Forages significantly increased flow hydraulic resistance expressed by Darcy-Weisbach friction factor by 188-202% and expressed by Manning's friction factor by 66-75%; and decreased overland flow velocity by 28-30%.The upslope inflow significantly increased overland flow velocity by 67% and stream power by 449%, resulting in increased sediment yield rate by 108%. Erosion rate exhibited a significant linear relationship with stream power. M. sativa exhibited the best in reducing soil loss which probably resulted from its role in reducing stream power. Forages on the downslope performed better at reducing sediment yield than upslope due to decreased rill formation and stream power. The findings contribute to an improved understanding of using vegetation to control water and soil loss and land degradation in semiarid environments. K E Y W O R D Sforage, hydraulics, overland flow, rainfall simulation, upslope inflow

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Overland runoff erosion dynamics on steep slopes with forages under field simulated rainfall and inflow

Pan

2020

Hydrological Processes

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“…The effects of vegetation coverage and rainfall intensity on soil erosion were not addressed in the meta-analysis due to an insufficient number of studies. Therefore, we calculated the runoff reduction benefit (RRB, %) and sediment reduction benefit (SRB, %) of different vegetation types according to Zhao, Huang, Wu, and Gao (2014)…”

Section: Variable Categorymentioning

confidence: 99%

Trade‐off between vegetation type, soil erosion control and surface water in global semi‐arid regions: A meta‐analysis

Liu

Cui

et al. 2020

Journal of Applied Ecology

109

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1. Soil erosion control and water resource protection can closely interact during restoration of terrestrial ecosystems. In semi-arid ecosystems, an urgent issue is how vegetation restoration can achieve the goal of soil erosion mitigation and water conservation, which in turn, feeds back to ecosystem functioning.2. We reviewed 78 articles from 22 countries in semi-arid areas to evaluate the effects of vegetation type (i.e. forest, grassland and scrubland) on runoff and sediment yields across different environmental conditions (i.e. vegetation coverage, rainfall intensity, slope gradient and soil texture).3. Our meta-analysis shows that runoff and sediment reduction both increased as the vegetation coverage increased, and tended to be stable when vegetation coverage exceeded 60%. Vegetation provided a greater benefit for sediment reduction than for runoff control under intense rainfall. Grasslands were generally more effective in reducing sediment than other vegetation types. Forests, grasslands and scrublands were most efficient in soil erosion control on 20°-30°, 0°-25° and 10°-25° slopes respectively. Grasslands and scrublands generally performed better with respect to soil erosion control on moderately coarse soils, whereas forests were most effective on medium-textured and moderately fine soils. Synthesis and applications. Effective restoration and soil erosion control in semi-arid ecosystems strongly depends on the selection of vegetation type. Our study further indicates that, for land managers, it is critical to consider local slope, and soil texture, and maintain appropriate vegetation coverage to achieve ecosystem sustainability. Grasslands might be particularly suitable to optimize the trade-off between soil erosion control and surface water resource in semi-arid regions. K E Y W O R D S erosion control, meta-analysis, restoration, soil texture, surface water resource, vegetation coverage, vegetation restoration, vegetation type S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section. How to cite this article: Wu G-L, Liu Y-F, Cui Z, et al. Trade-off between vegetation type, soil erosion control and surface water in global semi-arid regions: A meta-analysis.

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“…It is necessary to understand the relationship between slope gradient and soil erosion for rational planning of land use in a catchment, particularly in hilly areas. In the last few years, many researchers have studied the relationship between slope gradient and soil erosion by field runoff plots or simulated experiments, and some expressions have been established [16][17][18]. However, most of these studies were conducted under simple conditions, slight gradients or steep gradient conditions [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

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Abstract:A study was undertaken to develop an appropriate plan of land use under suitable slope gradient to control soil erosion from a red soil hilly watershed of southern China by using the GeoWEPP (Geo-spatial Interface for the Water Erosion Prediction Project) model. The model was calibrated and validated using monitoring data of the outlet from 2010 to 2012, in which the 2010 and 2012 annual total runoff and sediment yield data were used for calibration, and the 2011 monthly runoff and sediment yield data for validation. The performance of the model in validation period were good with a high coefficient of determination values of 0.98 and 0.93 and Nash-Sutcliffe simulations of 0.96 and 0.91 while low root mean square error values of 6.91 mm and 0.35 t respectively for runoff and sediment yield. Subsequently, the model was used to simulate four typical land use (forest, farm, orchard, and fallow land) in the study area to evaluate their impacts on soil erosion production. The results showed that the runoff decreased by 44.7% and 61.1% for forest and orchard land compared to the current land use, as well as the sediment yield OPEN ACCESSSustainability 2015, 7 14310 decreased by 43.7% and 68.6%. While the runoff and sediment yield increased by 52.2% and 42.6% for farm land, and 48.8% and 29.6% for fallow land. As the same time, soil erosion increased with increasing of the slope gradient of the quadratic regression equation for all land use. The critical slope gradient of 15° for returning the farmland to forest or others is suitable in the red soil region but is not accurate. The result of the study provides good scientific evidence for developing an appropriate plan of land use in the watershed and other similar areas.

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The dynamic effects of pastures and crop on runoff and sediments reduction at loess slopes under simulated rainfall conditions

Cited by 70 publications

References 25 publications

Overland runoff erosion dynamics on steep slopes with forages under field simulated rainfall and inflow

Overland runoff erosion dynamics on steep slopes with forages under field simulated rainfall and inflow

Trade‐off between vegetation type, soil erosion control and surface water in global semi‐arid regions: A meta‐analysis

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

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