Efficacy of orchard terrace measures to minimize water erosion caused by extreme rainfall in the hilly region of China: Long-term continuous in situ observations

Jian-nan, Duan; Liu, Yaojun; Tang, Changyuan; Shi, Zhihua; Yang, Jie

doi:10.1016/j.jenvman.2020.111537

Cited by 28 publications

(16 citation statements)

References 69 publications

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“…The results of this study also reflect this pattern. Existing studies have shown that terraces can reduce runoff and sediment by more than 90% (Duan et al., 2021; Rutebuka et al., 2021). This value is roughly consistent with the description of terrace‐growing crops in this study, and other management measures with terraced structures showed high SRs in steep and extremely steep areas.…”

Section: Discussionmentioning

confidence: 99%

Effects of different management measures on soil conservation and the influence of environmental conditions: a case study involving UAV remote sensing on the Loess Plateau

Guo

Shao

Ying

2022

Remote Sens Ecol Conserv

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To curb further deterioration due to soil erosion, the Chinese government has successively implemented a series of ecological improvement projects across the Loess Plateau (LP). This study used unmanned aerial vehicle remote sensing combined with the revised universal soil loss equation to quantitatively evaluate the soil conservation rate (SR) under 10 management measures and further incorporated the topographic slope into the analysis to describe the impacts of terrain changes. The results showed that the average SR of plots under artificial management measures was 61.24 AE 0.004% (P < 0.01), whereas that under non-artificial measures was 47.90 AE 0.007% (P < 0.01), which showed that human activities on the LP beneficially improved the SR. In addition, benefiting from the Grain to Green Project, cultivated fields, and economic forests exist only in areas with gentle slopes, and both these areas experience almost no threat of soil loss. A terraced structure exerts an obvious effect on extremely steep slopes (>40°), and a greater slope is associated with a more evident effect. However, the risk of structural failure also increases. In addition, due to restricted water conditions, the effects of existing soil and water conservation measures that use tree planting as the main method have the characteristics of horizontal and vertical zonation differentiation. Valley bottom and semi-humid areas are more profitable, and other areas are more suitable for planting drought-tolerant shrubs. In addition to guiding the deployment of future soil and water conservation measures, this study can provide a theoretical basis for adjusting the existing low-efficiency measures.

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Section: Discussionmentioning

confidence: 99%

Effects of different management measures on soil conservation and the influence of environmental conditions: a case study involving UAV remote sensing on the Loess Plateau

Guo

Shao

Ying

2022

Remote Sens Ecol Conserv

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“…The effect of reducing water and sediment in terraced fields is related to many factors. The structure of terraced fields, vegetation coverage, and vegetation types will impact water and sediment reduction in terraced fields (Duan et al 2021). However, due to the lack of long-term rainfall and runoff observation data in the study area, we could not distinguish the effects of terraced fields and vegetation in the Chenggou River Basin.…”

Section: Effects Of Check Dam and Terrace On Runoff And Sedimentmentioning

confidence: 91%

Runoff and sediment simulation of terraces and check dams based on underlying surface conditions

Liu

Zhao

et al. 2022

Appl Water Sci

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In the past few decades, the Loess Plateau has undergone large-scale underlying surface changes. A large number of soil and water conservation measures have been constructed, which have affected the runoff and sediment status in the region. How runoff and sediment status respond to underlying surface changes is the key to quantitatively evaluate the effect of water and sediment reduction by soil and water conservation measures in flood events. We selected check dams and terraced fields, which account for a large proportion of soil and water conservation measures as assessment objects and constructed a runoff-sediment model combining traditional physical mechanisms and deep learning to simulate and analyze flood events in a typical basin of the Loess Plateau. The results show that the simulation effect of model is good. The relative error of runoff is within 15%, average Nash–Sutcliffe efficiency coefficient is 0.86, and the relative error of soil loss is within 30%. Check dam system in the Chenggou River Basin can intercept 55.61% of the runoff and 47% of the soil loss in the basin on average, and terracing can reduce the runoff by 10.54% and the soil loss by 33.8%.

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“…In particular, the world's largest revegetation program, the Grain-for-Green project, initiated in 1999, has significantly enhanced vegetation cover after decades of deployment and operation [56]. Slope conservation measures can mitigate slope soil erosion by improving vegetation coverage (grass-planting and afforestation) or curtailing the lengths and gradients of slopes through smoothing the ground surface (constructing terraces) [57,58]. Check dams are frequently designed to build up in mountain streams, gullies, or channels as a series of stair-like grade-control constructions to stabilize longitudinal profiles, reduce bedload transport rates, intercept sediment, and regulate sediment trans-port [59].…”

Section: Possible Drivers Of Change In the Discharge-sediment Relatio...mentioning

confidence: 99%

Coupling Effects of Precipitation and Vegetation on Sediment Yield from the Perspective of Spatiotemporal Heterogeneity across the Qingshui River Basin of the Upper Yellow River, China

Yang

Zhang

Yang

2022

Forests

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Interactions between precipitation, vegetation, and erosion are crucial and not fully solved issues in the area of earth surface processes. The Qingshui River Basin (QRB), as the main sediment source tributary of the upper reaches of the Yellow River, is characterized by spatial heterogeneity of rainfall, vegetation, and soil erosion. In this study, we investigated the spatiotemporal variations of sediment yields within the QRB and further identified the coupling effects of precipitation and vegetation on soil erosion. We collected annual (1955 to 2016) and daily (2006 to 2016) hydrological and sediment series from six hydrological stations, which subdivided the whole basin into six different sub-basins with heterogeneity in climate and landscape. Variations in parameter a of the sediment rating curves among the six sub-basins continuously declined, showing the continuously increasing effect of vegetation coverage on reducing soil erosion. The unique combination of relationships between precipitation characteristics and vegetation patterns in six sub-basins and these coupling effects resulted in different precipitation–vegetation–erosion patterns in six sub-basins. Sediment yield followed bell-shaped relationships with vegetation and precipitation, with a clear critical threshold at normalized difference vegetation index (NDVI) = 0.36/precipitation = 100 mm at a monthly scale. Based on these thresholds, the non-linear relationships between precipitation, vegetation, and erosion were also explained. We also found that reducing the time lags in which vegetation follows precipitation may be effective in suppressing sediment yield. These findings could provide a quantitative approach to estimating the potential changes in sediment yield associated with proposed ecological rehabilitation schemes in this region.

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Efficacy of orchard terrace measures to minimize water erosion caused by extreme rainfall in the hilly region of China: Long-term continuous in situ observations

Cited by 28 publications

References 69 publications

Effects of different management measures on soil conservation and the influence of environmental conditions: a case study involving UAV remote sensing on the Loess Plateau

Effects of different management measures on soil conservation and the influence of environmental conditions: a case study involving UAV remote sensing on the Loess Plateau

Runoff and sediment simulation of terraces and check dams based on underlying surface conditions

Coupling Effects of Precipitation and Vegetation on Sediment Yield from the Perspective of Spatiotemporal Heterogeneity across the Qingshui River Basin of the Upper Yellow River, China

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