rainfall erosion
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2022 ◽  
Vol 301 ◽  
pp. 113883
Author(s):  
Xiaohao Sun ◽  
Linchang Miao ◽  
Runfa Chen ◽  
Hengxing Wang ◽  
Jingxin Xia

2021 ◽  
Vol 61 (2) ◽  
pp. 123-153
Author(s):  
Tin Lukić ◽  
Tanja Micić Ponjiger ◽  
Biljana Basarin ◽  
Dušan Sakulski ◽  
Milivoj Gavrilov ◽  
...  

The paper aims to provide an overview of the most important parameters (the occurrence, frequency and magnitude) in Vojvodina Region (North Serbia). Monthly and annual mean precipitation values in the period 1946–2014, for the 12 selected meteorological stations were used. Relevant parameters (precipitation amounts, Angot precipitation index) were used as indicators of rainfall erosivity. Rainfall erosivity index was calculated and classified throughout precipitation susceptibility classes liable of triggering soil erosion. Precipitation trends were obtained and analysed by three different statistical approaches. Results indicate that various susceptibility classes are identified within the observed period, with a higher presence of very severe rainfall erosion in June and July. This study could have implications for mitigation strategies oriented towards reduction of soil erosion by water.


2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Shangwei Wu ◽  
Dongming Wu ◽  
Xiaofei Jing ◽  
Xuanyi Chen ◽  
Yijun Wang ◽  
...  

In recent years, rainstorm disasters caused by global warming have frequently occurred in China. It has caused serious damage to artificial high embankments. In this paper, the influence of rainfall intensity, slope, and reinforced layers on the erosion and destruction of the artificial high embankment is deeply analyzed. Through the model test, the rainfall erosion prediction model is established. The results show that (1) the gully width, depth, and erosion amount increased with the increase in rainfall intensity and slope and decreased with the increase in reinforcement layers; (2) the final ditch shape of the embankment is influenced by steel bars; and (3) according to the model test data, the mathematical model of dike scouring is established. Rainfall intensity and the coupling between slope and reinforced layers are considered in the model. It can be used for predicting erosion during rainfall.


2021 ◽  
Vol 8 ◽  
Author(s):  
Yunbin Ke ◽  
Yanyu Chen ◽  
Zhenliang Jiang ◽  
Yonghui Qiu

This study developed a discrete element simulation model based on the 2D particle flow code (PFC2D), of which the mesoscopic parameters were calibrated by the indoor experiments, to investigate the rainfall erosion damage of residual soil slope in the intermittently frozen area. It is to be noted that the runoff scouring action was simulated according to the equivalent rainfall method, the soil particles on the slope were given initial velocity, and the water absorption was considered by increasing the unit weight. The results indicated that the scouring action only caused superficial erosion with the main damage region at the foot, regardless of the FT effect. A splitting phenomenon was observed in the lower part of the steeper slope under the FT effect. Moreover, regardless of the FT effect, the gentler slope tended to incur spalling rather than a splitting phenomenon, where the soil particles slid along the structural plane with strong anti-scouring ability. Besides, the gentler slope maintained higher stability and shorter scouring time. Finally, the scouring velocity increased the erosion damage to a large extent.


Author(s):  
Xiaohao Sun ◽  
Linchang Miao ◽  
Hengxing Wang ◽  
Junhao Yuan ◽  
Guangcai Fan

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Anggy Palleriani Harahap ◽  
Abdul Rauf ◽  
Miswar Budi Mulya

The Belawan watershed is located at  Deli Serdang Regency and Medan City, with mountainous terrain (70.58%), hills (35.15%), and slopes (20.28%). This study aims to identify  the risk of erosion of cropland, especially coffee, corn, and chocolate,  to identify  more appropriate erosion control measures to achieve regional protection objectives . The research was conducted in the upstream Belawan watershed in the Sibolangit, Bandar Baru, and Kutalimbaru regions  from September 2020 to December 2020. The magnitude of the erosion  hazard value  is analysed using the USLE approach . The USLE method on the amount of erosion is determined by 5 (five) factors, these factors are the rainfall erosion  factor (R); soil erodibility factor (K); vegetation factor (C); conservation factor (P) and topography factor (LS). The erosion rate valuefor land use types  varies from 95.27 tons/Ha.yr to 232.43 tons/Ha.yr. The amount of erosion that can be tolerated in land use  for coffee, corn, and cacao  ranges from 19.94 tons/Ha.yr to 39.79 tons/Ha.yr. The risk level  for erosion  in coffee areas 4.83 and 10.86 with high criteria and very high criteria; in areas  of corn  event 6.29 and 8.38 with high criteria and in brown areas  5.24 and 3.88 with high criteria and medium criteria.


2021 ◽  
Author(s):  
Peter Kinnell

<p>Raindrop driven erosion – what is in the black box ?</p><p>P.I.A. Kinnell</p><p>Faculty of Science and Technology, University of Canberra, Canberra, Australia</p><p>Many experiments applying rainfall to produce erosion on soil surfaces consider the inputs and outputs in a black box situation where little or no consideration is given to the actual mechanisms controlling erosion. It is well known that rainfall erosion is caused by raindrop impact and flow forces acting singly or together. Raindrops impacting directly or through surface water detaches soil material from where it is held within the soil surface by cohesion and inter-particle friction  and erosion occurs if the detached material is transported away from the site of detachment. The movement of detached material downslope may be in the air by splash or more importantly in surface water flows where raindrop impact may induce coarse sediment may to move when sediment transport normally associated with undisturbed flow does not occur. These transport processes vary in space and time during laboratory and field experiments. How this influences the amounts of soil loss during these experiments is the subject of  this presentation .</p>


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