Simulation of the landform change process on a purple soil slope due to tillage erosion and water erosion using UAV technology

2020 ◽  
Vol 17 (6) ◽  
pp. 1333-1344
Author(s):  
Chao Yang ◽  
Zheng-an Su ◽  
Jian-rong Fan ◽  
Hai-dong Fang ◽  
Liang-tao Shi ◽  
...  
Keyword(s):  
Change Process ◽  
Water Erosion ◽  
Purple Soil ◽  
Soil Slope ◽  
Tillage Erosion

Estimating rill erosion and sediment transport processes along a saturated purple soil slope

2021 ◽  
Author(s):  
Han Zhen ◽  
Xiaoyan Chen ◽  
Yanhai Li ◽  
Shiqi Chen ◽  
Xiaojie Gu ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Sediment Concentration ◽  
Transport Processes ◽  
Purple Soil ◽  
Rill Erosion ◽  
Soil Slope ◽  
Sediment Transportation ◽  
Erosion Models ◽  
Increasing Trend ◽  
Soil Slopes

A plough pan with reduced permeability always accumulates infiltrated water along slopes then saturates the cultivated layer under continuous rain. Topsoil saturation is a frequent phenomenon and an important process of the special soil slopes. A methodology and device system was used in this study to keep cultivated purple soil saturated. Strands of scouring tests were developed to quantify the rill erosion and sediment transport processes along a saturated purple soil slope at four experiment slopes (5°, 10°, 15°, and 20°) and three flow discharges (2, 4 and 8 L min−1). The experimental results indicated that the sediment transport capacity on a saturated purple soil slope ranged from 0.03 to 1.56 kg s−1 m−1 with the increasing trend along the slope gradient and flow discharge, and the increasing trend could be well matched by a nonlinear multivariable equation. The sediment concentration of the saturated purple soil slope exponentially increased with rill length and decreased with the increment rate and the maximum sediment concentrations observed in this study in different hydraulic events ranged from 108.13 to 1174.20 kg m-3. Saturated and non-saturated purple soil slopes erode differently with the maximum sediment concentration of saturated purple soil slope recorded at approximately 1.42-2.10 times the values for non-saturated purple soil slope. The findings of this research help illustrate the sediment transportation and erosion behaviors of a saturated purple soil slope, and serve as the basis for determining the parameters in the erosion models of the purple soil slope.

scholarly journals The Effect of Shallow Tillage on Soil Erosion in a Semi-Arid Vineyard

Agronomy ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 257 ◽  
Author(s):  
Agata Novara ◽  
Giovanni Stallone ◽  
Artemio Cerdà ◽  
Luciano Gristina
Keyword(s):  
Soil Erosion ◽  
Soil Degradation ◽  
Erosion Rate ◽  
Arable Land ◽  
Water Erosion ◽  
Soil Tillage ◽  
Strip Tillage ◽  
The Impact ◽  
Semi Arid ◽  
Tillage Erosion

Soil erosion has been considered a threat for semi-arid lands due to the removal of solid materials by water and wind. Although water erosion is currently considered the most important process of soil degradation, a growing interest has been drawn to the impact of soil tillage. Although numerous studies on tillage erosion have been carried out on arable land using a moldboard plow, a chisel, and a tandem disc for different crops, there are no studies on the effect of shallow tillage on soil redistribution in vineyards. The aim of this work was to evaluate the soil tillage erosion rate in a vineyard using a 13C natural abundance tracer. A strip of soil (C3-C soil) was removed, mixed with C4-C tracer, and replaced. After the installation of the strip, tillage (upslope in one inter-row and downslope in the other inter-row) was performed with a cultivator and soil was collected along the slope with an interval of 0.2 m from the C4-C strip. Soil organic carbon and δ13C were measured and the total mass of translocated soil (T) soil was calculated. The net effect of tillage after two consecutive operations (downslope and upslope tillage) was a T of 49.3 ± 4.2 kg m−1. The estimated annual erosion rate due to tillage in the studied vineyard was 9.5 ± 1.2 Mg ha−1year−1. The contribution of the soil tillage erosion rate was compared with that of water erosion in the same vineyard, and we conclude that tillage is a threat to soil degradation.

scholarly journals Tillage erosion: a review of controlling factors and implications for soil quality

2006 ◽  
Vol 30 (4) ◽  
pp. 443-466 ◽  
Author(s):  
K. Van Oost ◽  
G. Govers ◽  
S. De Alba ◽  
T. A. Quine
Keyword(s):  
Soil Properties ◽  
Water Erosion ◽  
Controlling Factors ◽  
Conservation Strategies ◽  
Soil Productivity ◽  
Data Set ◽  
Erosion Rates ◽  
Soil Redistribution ◽  
Tillage Depth ◽  
Tillage Erosion

Tillage erosion has been identifed as an important global soil degradation process that has to be accounted for when assessing the erosional impacts on soil productivity, environmental quality or landscape evolution. In this paper, we present a summary of available data describing tillage erosion. This provides insights in the controlling factors determining soil redistribution rates and patterns by tillage for various implements used in both mechanized and non-mechanized agriculture. Variations in tillage depth and tillage direction cause the largest variations in soil redistribution rates, although other factors, such as tillage speed and implement characteristics, also play an important role. In general, decreasing tillage depth and ploughing along the contour lines substantially reduce tillage erosion rates and can be considered as effective soil conservation strategies. Implement erosivities reported in literature, characterized by the tillage transport coeffcient, are very consistent and range in the order of 400–800 kg m-1yr-1 and 70–260 kg m-1yr-1 for mechanized and nonmechanized agriculture, respectively. Comparison of tillage erosion rates with water erosion rates using a global data set indicates that tillage erosion rates are at least in the same order of magnitude or higher than water erosion rates, in almost all cases. Finally, we discuss how tillage erosion increases the spatial variability of soil properties and affects soil nutrient cycling. Considering the widespread use of tillage practices, the high redistribution rates associated with the process and its direct effect on soil properties, it is clear that tillage erosion should be considered in soil landscape studies.

Research of Compressibility of Purple Soil in the Three Gorges Reservoir

2014 ◽  
Vol 1010-1012 ◽  
pp. 622-625 ◽  
Author(s):  
Shi Feng Guan ◽  
Zhen Yao Xia ◽  
Lin Lin Zhang ◽  
Yi Chen
Keyword(s):  
Moisture Content ◽  
Three Gorges Reservoir ◽  
Compression Modulus ◽  
Purple Soil ◽  
Three Gorges ◽  
Soil Slope ◽  
The Three Gorges Reservoir ◽  
The Three Gorges ◽  
Three Gorges Reservoir Region ◽  
Compressible Soil

Ecological restoration of soil slope has become an important content in the three gorges reservoir region. Based on the compression test of purple soil in the three gorges reservoir region, analyzed the index of compressibility, reflected the compactness of the different moisture content of purple soils, provided theoretical guidance for the ecological slope protection. Results of the trial indicated that the purple soils are the high-compressible-soil; the void ratio of purple soil reduces obviously with the increase of moisture content; with the increase of moisture content, the compression coefficient first increases and then decreases, and the compression index decreases gradually; but the compression modulus does not show a similar trend, it's minimum on the moisture content of 14%.

Impact of tillage erosion on water erosion in a hilly landscape

2016 ◽  
Vol 551-552 ◽  
pp. 522-532 ◽  
Author(s):  
Y. Wang ◽  
J.H. Zhang ◽  
Z.H. Zhang ◽  
L.Z. Jia
Keyword(s):  
Water Erosion ◽  
Tillage Erosion

Soil erosion studies should consider the effect of water erosion on tillage erosion

2017 ◽  
Vol 72 (2) ◽  
pp. 38A-41A ◽  
Author(s):  
Ji-feng Deng ◽  
Yan-li Jing ◽  
Da-chuan Yin
Keyword(s):  
Soil Erosion ◽  
Water Erosion ◽  
Effect Of Water ◽  
Tillage Erosion

Study on SOC Forecast Model in Regions of Hilly Purple Soil by Water Erosion

2011 ◽  
Vol 391-392 ◽  
pp. 982-987 ◽  
Author(s):  
Tian Guo ◽  
Bing Hui He ◽  
Jing Jing Chen
Keyword(s):  
Organic Carbon ◽  
Relative Error ◽  
Forecast Model ◽  
Water Erosion ◽  
Grey Model ◽  
Vegetation Coverage ◽  
Purple Soil ◽  
Test Accuracy ◽  
Small Watershed ◽  
Variance Test

The soil productive forces are mainly affected by soil erosion as soil nutrients and organic carbon are taken away. On the premise of analysis of the last 17 years’ data of rainfalls and vegetation coverage in Xiejiawan small watershed, the grey model was established to forecast and evaluate the losses of organic carbon caused by water erosion in the hilly area of purple soils. Moreover, according to comparison of four-dimensional, five-dimensional and six-dimensional model groups, we found that, six-dimensional GM (1,1) model was the best one, posterior-variance-test accuracy of which amounted to the first class, and maximum simulated relative error ,average simulated relative error and predicted relative error of which were respectively 43.26 % ,16.85% and -17.09%, besides, its simulation and prediction accuracy was also high. Furthermore, the accuracy of simulated forecast value was all satisfactory. So the SOC loss by water erosion in purple areas of Xiejiawan small watershed was simulated and predicted well by grey model, also the unique evolution patterns of changing organic carbon in purple soil by water erosion could be well described and explained by the grey model.

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