The effects of raindrop impact and runoff detachment on hillslope soil erosion and soil aggregate loss in the Mollisol region of Northeast China

Liu, Jia; Zheng, Fenli; Li, Guifang; Bao, Feng; An, Juan

doi:10.1016/j.still.2016.04.002

Cited by 154 publications

(47 citation statements)

References 49 publications

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“…During rainstorms, the decrease in aboveground biomass following fires allows for a higher raindrop splash impact, which detaches mineral material and makes it available for transportation, and simultaneously forms sealed mechanical crusts on the ground surface that increase water runoff [53]. Further, the reduced aboveground biomass accelerates water runoff, leading to increased water erosivity and detachment of soil particles by either rill or interrill erosion [54].…”

Section: Impacts Of Wildfires On Surface Processesmentioning

confidence: 99%

Wildfires in Grasslands and Shrublands: A Review of Impacts on Vegetation, Soil, Hydrology, and Geomorphology

Stavi

2019

Water

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Wildfires are prevalent in grasslands and shrublands. The objective of this study is to provide land managers with a general overview, by assessing the main impacts of wildfire, including those on plant communities (e.g., secondary succession and species invasion), soil characteristics (e.g., water repellency (hydrophobicity), aggregation and structure stability, and contents of organic carbon and nutrients), and surface processes (e.g., ash deposition, ground surface clogging, water runoff, soil erosion, hillslope debris flow, and dry ravel). Additionally, the study discusses the effects of livestock grazing on the functioning of post-fire grasslands and shrublands. Although mesic regions are mentioned, this review focuses on drylands. The comparatively low-to-moderate fuel loads that characterize grasslands and shrublands generate wildfires of relatively moderate intensity, resulting in moderate burn severity. Yet, it seems that because of decreased soil aggregate stability following burning, the hoof action of livestock that access burnt lands shortly after the fire increases the shearing and detachment of mineral material from the ground surface; this increases soil erodibility, with the possible risk of accelerated land degradation. The review ends with an assessment of general implications for environmental sustainability and health, and provides recommendations on wildfire control in rangelands, and on restoration of burnt lands.

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Section: Impacts Of Wildfires On Surface Processesmentioning

confidence: 99%

Wildfires in Grasslands and Shrublands: A Review of Impacts on Vegetation, Soil, Hydrology, and Geomorphology

Stavi

2019

Water

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“…As rainfall progressed, the positive impact of rainfall intensity on soil infiltration rate decreased with rainfall amount ( Figure S1) as soil crusts developed, during which rainfall intensity played a more important role in the alteration of surface soil structure than rainfall amount (Wang, Steiner, Zheng, & Gowda, 2017). High intensity rainfall contributed to the rapid formation of soil crust, leading to the sharp decrease of infiltration rate at the unsteady infiltration stage (Lu et al, 2016;Vaezi, Ahmadi, & Cerdà, 2017).…”

Section: Impact Of Rainfall Intensity On Rainfall Infiltration On Ementioning

confidence: 99%

“…Soil infiltration is an important soil hydrological behaviour that influences many soil processes and functions, such as groundwater recharge, soil erosion, slope stability, plant water availability, and soil carbon loss in the global C cycle (Bryan, ; Dlamini et al, ; Franzluebbers, ; Lu, Zheng, Li, Bian, & An, ; Mchunu, Lorentz, Jewitt, Manson, & Chaplot, ; Ribolzi et al, ; Xiao et al, ). Knowledge of soil infiltration by water is of great importance to understand and manage soil hydrological processes, water erosion, agricultural extension, and food production, especially in rain‐fed agricultural regions.…”

Section: Introductionmentioning

confidence: 99%

Impact of erosion‐induced land degradation on rainfall infiltration in different types of soils under field simulation

Wei

Cai

et al. 2019

Land Degrad Dev

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Land degradation induced by water erosion is a worldwide problem for sustainable agriculture. Erosion results in the alteration of soil properties to a varying extent that depends on soil type. However, limited attempts have been made to assess the impact of erosion‐induced land degradation on soil infiltration on a wide range of soil types. Herein, field rainfall simulation experiments were performed on prewetted bare heavy‐textured soils at three erosion degrees (no, moderate, and very severe) for five types of soils (Calcic Luvisol, Ferric Luvisol, Plinthic Alisol, Plinthic Acrisol, and Acric Ferralsol). Soil infiltration rate was determined at two rainfall intensities (45 and 90 mm hr−1) and 3‐min intervals for 60‐min runoff duration on microplots (3 m long × 0.8 m wide, 10° slope). At the low rainfall intensity, the impact of erosion‐induced land degradation on rainfall infiltration increased from Calcic Luvisol to Plinthic Acrisol, and the steady state infiltration rate (fc) was well characterized by bulk density and 1.4‐nm intergrade minerals (Adj‐R2 = 0.79, p < 0.001). At the high rainfall intensity, fc was negatively related with illite solely (Adj‐R2 = 0.25, p < .05) and generally increased with an increase of erosion severity; the impact of erosion‐induced land degradation on fc was magnified for Calcic Luvisol and Acric Ferralsol but lessened for other soil types. Collectively, the impact of erosion‐induced land degradation generally increased with increased soil structural stability at the low rainfall intensity and was determined by the interaction between soil structure and rainfall at the high rainfall intensity.

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“…However, the research enthusiasm has subsided in the following decades as indicated by the scarcity of publications in this particular aspect in the literature. Although research has continued on characterizing interrill erosion processes (e.g., Armstrong et al, ; Asadi et al, ; Defersha et al, ; Ding & Huang, ; Koiter et al, ; Lu et al, ; Shi et al, ; Wang et al, ), it is not until recent years that the use of sediment tracers such as rare earth elements (e.g., Darvishan et al, ; Guzman et al, ; Polyakov & Nearing, ; Zhang et al, , ) has prompted the need of fully understanding interrill erosion processes and determining the controlling process in order to correctly interpret experimental data and properly develop and parameterize interrill erosion models. In addition, there is also a need to fill a data gap left by previous studies that do not adequately constrain the factors controlling interrill erosion in situations comparable to those that erode croplands in the United States.…”

Section: Introductionmentioning

confidence: 99%

Determining and Modeling Dominant Processes of Interrill Soil Erosion

Zhang

2019

Water Resources Research

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Understanding the dominant process of interrill soil erosion is imperative to better modeling interrill sediment delivery rates. The objectives are to (1) determine the limiting erosion process (detachment vs. transport) that controls interrill erosion under the study conditions, (2) quantify the effects of water and/or sediment influxes from upslope on downslope sediment transport and interrill erosion, and (3) evaluate the ability of commonly used hydraulic parameters for simulating interrill sediment delivery. Runoff, sediment delivery, and raindrop splash were simultaneously collected from two flumes (1.8 m × 0.5 m) and a 2.5‐cm slot between the flumes for three intensities of 60, 90, and 120 mm/hr at three slopes of 9%, 18%, and 27% under two cover treatments. Results showed that slot splash rates were consistently greater than flume wash rates, indicating that sediment transport capacity limited interrill sediment delivery under the study conditions. Soil detachment by raindrop impact was more influenced by surface water depth, while sediment transport capacity by flow velocity. The former played a bigger role in determining interill sediment delivery under detachment‐limited cases while the latter under transport‐limited conditions. Linear correlation coefficients between sediment delivery rates and hydraulic predictors were 0.545 for shear stress, 0.946 for stream power, 0.867 for unit stream power, and 0.948 for an empirical lumped model that includes a rainfall intensity term. Stream power and the empirical model were better predictors for interrill sediment delivery. However, their predictive abilities need to be assessed more rigorously at various impact levels of rainfall kinetic energy.

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The effects of raindrop impact and runoff detachment on hillslope soil erosion and soil aggregate loss in the Mollisol region of Northeast China

Cited by 154 publications

References 49 publications

Wildfires in Grasslands and Shrublands: A Review of Impacts on Vegetation, Soil, Hydrology, and Geomorphology

Wildfires in Grasslands and Shrublands: A Review of Impacts on Vegetation, Soil, Hydrology, and Geomorphology

Impact of erosion‐induced land degradation on rainfall infiltration in different types of soils under field simulation

Determining and Modeling Dominant Processes of Interrill Soil Erosion

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