Influence of ridge height, row grade, and field slope on soil erosion in contour ridging systems under seepage conditions

Liu, Q.J.; An, J.; Wang, L.Z.; Wu, Yadong; Zhang, H.Y.

doi:10.1016/j.still.2014.11.008

Cited by 50 publications

(36 citation statements)

References 36 publications

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“…(d) It is more difficult for higher microrelief to produce a surface crust; thus, higher microrelief has higher soil infiltration than does lower microrelief (Helming, Roth, Wolf, & Diestel, ). However, some researchers have found that microrelief can increase the erosive capacity of soil by concentrating flows, with a higher degree of microrelief being a source of soil erosion (Liu, An, Wang, Wu, & Zhang, ; Luo, Zheng, Li, & He, ; Römkens, Helming, & Prasad, ).…”

Section: Discussionmentioning

confidence: 99%

Assessing the impacts of microtopography on soil erosion under simulated rainfall, using a multifractal approach

Luo

Zheng

et al. 2018

Hydrological Processes

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This study aimed to investigate the changing characteristics of microrelief of purple soil and its erosional response during successive stages of water erosion, including splash erosion, sheet erosion, and rill erosion. Methods employed included a rainfall simulator and the use of a laser scanner to generate a digital elevation model. Three artificial tillage practices, including conventional tillage (CT), artificial digging (AD), and ridge tillage (RT), were used to simulate different microrelief patterns. Eighteen artificial rainfall experiments were conducted using three 2 × 1 m boxes with a rainfall intensity of 1.5 mm min−1 on a 15° slope. The results showed that the soil roughness (SR) index values for the tillage slopes were RT > AD > CT. The combined effects of detachment by raindrop impact and transport by run‐off decreased the SR index, whereas rill erosion increased the SR index during rainfall event. Microtopography and drainage networks have strong multifractal behaviours. The multifractal parameters of microtopography reflect the overall characteristics as well as the characteristics of the local soil surface. Within a certain range of threshold values, higher microrelief causes less soil erosion. However, when the parameters of spatial heterogeneity of microtopography exceed the threshold values, a higher degree of microrelief can increase soil erosion. These results help clarify the effect of microtopography on soil erosion and provide a theoretical foundation to guide future tillage practices on sloping farmland of purple soil.

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Section: Discussionmentioning

confidence: 99%

Assessing the impacts of microtopography on soil erosion under simulated rainfall, using a multifractal approach

Luo

Zheng

et al. 2018

Hydrological Processes

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“…Topographic heterogeneity imposes environmental constraints on vegetation dynamics by producing complex substrates with variable structure, hydrology, and chemistry [37]. In particular, elevation determines the altitudinal zonality of soil [38,39] and slope controls the velocity of surface flows [40]. The aspect affects the direction of flows, insolation and the intensity of evaporation [41].…”

Section: Introductionmentioning

confidence: 99%

Assessing Future Vegetation Trends and Restoration Prospects in the Karst Regions of Southwest China

et al. 2016

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To alleviate the severe rocky desertification and improve the ecological conditions in Southwest China, the national and local Chinese governments have implemented a series of Ecological Restoration Projects since the late 1990s. In this context, remote sensing can be a valuable tool for conservation management by monitoring vegetation dynamics, projecting the persistence of vegetation trends and identifying areas of interest for upcoming restoration measures. In this study, we use MODIS satellite time series (2001-2013) and the Hurst exponent to classify the study area (Guizhou and Guangxi Provinces) according to the persistence of future vegetation trends (positive, anti-persistent positive, negative, anti-persistent negative, stable or uncertain). The persistence of trends is interrelated with terrain conditions (elevation and slope angle) and results in an index providing information on the restoration prospects and associated uncertainty of different terrain classes found in the study area. The results show that 69% of the observed trends are persistent beyond 2013, with 57% being stable, 10% positive, 5% anti-persistent positive, 3% negative, 1% anti-persistent negative and 24% uncertain. Most negative development is found in areas of high anthropogenic influence (low elevation and slope), as compared to areas of rough terrain. We further show that the uncertainty increases with the elevation and slope angle, and areas characterized by both high elevation and slope angle need special attention to prevent degradation. Whereas areas with a low elevation and slope angle appear to be less susceptible and relevant for restoration efforts (also having a high uncertainty), we identify large areas of medium elevation and slope where positive future trends are likely to happen if adequate measures are utilized. The proposed framework of this analysis has been proven to work well for assessing restoration prospects in the study area, and due to the generic design, the method is expected to be applicable for other areas of complex landscapes in the world to explore future trends of vegetation.

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“…The storage capacity of ridges or soil‐retaining structures decreases with increasing slope gradient. Ridges or soil‐retaining structures were easily destroyed on steep slopes under the condition of similar rainfall intensity, which will increase surface runoff (Liu, An, Wang, Wu, & Zhang, ). Some meta‐analyses have found that no‐tillage and no‐tillage with mulch were conducted on slope gradients <15° and the runoff reduction increased with increasing slope gradient, which is consistent with our results (Mhazo et al, ; Sun et al, ).…”

Section: Discussionmentioning

confidence: 99%

Effects of minimum soil disturbance practices on controlling water erosion in China's slope farmland: A meta‐analysis

Jia

Zhao

et al. 2019

Land Degrad Dev

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Slope farmlands are commonly found in China, and soil loss from slope farmland is the main source of river sediment. Minimum soil disturbance practices were considered effectively in controlling water erosion, especially on slope farmlands. Although their beneficial effects have been universally recognized, further research is still needed to quantify the extent of minimum soil disturbance practices in reducing runoff and sediment yield. We present a quantitative review based on a nationwide meta‐analysis, including 536 runoff and 615 sediment‐paired observations, to evaluate the effectiveness of minimum soil disturbance practices in controlling water erosion in China. Minimum soil disturbance practices in China reduced runoff and sediment yield by 36.09% and 51.69%, respectively. Collecting soil to form ridges with no‐tillage, contour tillage with hedgerow, and micro‐basins tillage demonstrated significantly greater (p < 0.05) runoff and sediment yield reductions than other three practices (no‐tillage, no‐tillage with mulch, and contour tillage). Practices that change in soil properties by microtopography management were superior (p < 0.05) to practices that change soil properties without tillage in reducing runoff and sediment yield. Minimum soil disturbance practices are more effective in reducing sediment yield than runoff due to its additional effects besides reducing runoff directly. No correlations between runoff or sediment yield reduction and slope gradient were observed, whereas the efficiency of water erosion control by minimum soil disturbance practices increased with the increasing slope length. As a soil and water conservation measure, minimum soil disturbance practices can be applied in slope farmland of China.

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Influence of ridge height, row grade, and field slope on soil erosion in contour ridging systems under seepage conditions

Cited by 50 publications

References 36 publications

Assessing the impacts of microtopography on soil erosion under simulated rainfall, using a multifractal approach

Assessing the impacts of microtopography on soil erosion under simulated rainfall, using a multifractal approach

Assessing Future Vegetation Trends and Restoration Prospects in the Karst Regions of Southwest China

Effects of minimum soil disturbance practices on controlling water erosion in China's slope farmland: A meta‐analysis

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