Impact of extreme rainfall events on soil erosion on karst Slopes: A study of hydrodynamic mechanisms

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 638, P. 131532 - 131532

Published: June 18, 2024

Language: Английский

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Water Erosion Response to Rainfall Type on Typical Land Use Slopes in the Red Soil Region of Southern China

Water, Journal Year: 2024, Volume and Issue: 16(8), P. 1076 - 1076

Published: April 9, 2024

Land use and rainfall are two important factors affecting soil erosion processes. The red region of southern China is a representative with high amounts rapidly changing land patterns where the water process sensitive to changes in rainfall. To comprehensively understand response this region, 6-year situ experiment based on eight plots (bare seven typical uses) was conducted from 2015 2020. 320 events were divided into 4 types, there 3 main types. runoff different types primarily determined by amount, while intensity. High-intensity contributed most both total erosion. Compared bare land, uses reduced more than 75%. Grassland, cropland, forest low vegetation coverage experienced erosion, shrubland effectively combination type significantly affected annual average depth, modulus, loss coefficient. Rainfall can change relationship between for uses. highly correlated characteristics, weakened under short- or moderate-duration reduce high-intensity should receive special attention, all ensure that well developed, especially understory vegetation.

Language: Английский

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Preparation and Properties of a Modified Aluminum Hydroxide-Co-Polyacrylic Acid Water Erosion Resistance Material

Published: Jan. 1, 2025

Abstract:Soil water-resistant materials play an important role in controlling soil erosion. In this study, we prepared P(mAl(OH)3-co-AA). by the modification of aluminum hydroxide and free radical polymerization acrylic acid. The structure, morphology, thermal stability emulsion were characterized infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermogravimetric analysis (TG), particle size analysis. Then, was added to loess/laterite samples, water erosion resistance, compressive strength, retention, as well plant germination, assessed. resistance time pure loess only 10 min without emulsion, 25000 after adding 0.5 wt.% P(mAl(OH)3-co-AA), 2,500 times higher than that loess, while rate decreased from 625 0.01%/h. laterite 15 min, addition P (mAl(OH)3-co-AA) increased it 24.8 372 min. reduced 1428 400%/h, which is 3.6 lower. By (mAl(OH)3, strength 4.0 MPa/4.6 MPa, 6.6 soil, respectively. Plant growth experiments proved P(mAl(OH)3-co-AA) does not affect germination.

Language: Английский

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Isotope tracer study of soil erosion in a typical sub-watershed in the eastern Tianshan Mountains, China

Journal of Environmental Radioactivity, Journal Year: 2025, Volume and Issue: 285, P. 107667 - 107667

Published: March 12, 2025

Language: Английский

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The potential effect of temperature on surface deformation after water drop impact in soils with different texture and moisture content

CATENA, Journal Year: 2025, Volume and Issue: 255, P. 109005 - 109005

Published: April 14, 2025

Language: Английский

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Influence of Sugarcane on Runoff and Sediment Yield in Sloping Laterite Soils During High-Intensity Rainfall

Agronomy, Journal Year: 2025, Volume and Issue: 15(3), P. 596 - 596

Published: Feb. 27, 2025

Laterite is the predominant zonal soil in China’s southernmost tropical rainforest and monsoon forest regions, where typhoons are primary source of precipitation. These storms pose significant risks land degradation due to heavy rainfall. In recent years, a substantial area sloping has been converted agricultural use these predominantly for cultivation crops grown laterite soil. activities contribute erosion, exacerbate environmental challenges, hinder pursuit sustainable development. There paucity research reports on processes mechanisms runoff sediment sugarcane-cropped slopes regions with under rainfall conditions. this study, four different scenarios 75, 100, 125, 150 mm/h were designed assess impact sugarcane growth at key stages measure resulting effects initial time, surface runoff, yield from controlled laboratory The results showed that Horton model explained much variation infiltration rate slopes. cumulative followed second-degree polynomial function. intensity, all linearly related leaf index (LAI) intensity slope surface. exerted greater influence time than intensity. However, index. Compared bare land, average was reduced by 12.2, 33.1, 58.2, 64.9% seedling, tillering, elongation, maturity, respectively.

Language: Английский

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Assessment and trends of temporal‐spatial changes in land use and slope on soil erosion dynamics: a case study in the Qianhe Graben, China

Environmental Earth Sciences, Journal Year: 2025, Volume and Issue: 84(8)

Published: April 1, 2025

Language: Английский

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Assessing the impact of extreme rainfall and slope surface conditions on runoff and erosion based on a big database in Southwest China’s karst region

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133273 - 133273

Published: April 1, 2025

Language: Английский

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Comparison of spatial interpolation methods for rainfall erosivity in a typical basin in the Hengduan Mountain region, Southwest China

Ecological Indicators, Journal Year: 2025, Volume and Issue: 174, P. 113451 - 113451

Published: April 10, 2025

Language: Английский

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Differential response of runoff-sediment hysteresis relationships to watersheds hydrological structural connectivity

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133458 - 133458

Published: May 1, 2025

Language: Английский

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