Prediction of Sediment Yield in the Middle Reaches of the Yellow River Basin Under Extreme Precipitation

Dang, Suzhen; Liu, Xiaoyan; Yin, Huijuan; Guo, Xinwei

doi:10.3389/feart.2020.542686

Cited by 19 publications

(11 citation statements)

References 61 publications

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“…Soil erosion can seriously harm the ecological environment, human survival, and socioeconomic development (Romshoo et al, 2021;Zhang et al, 2021). In addition, soil erosion has a significant impact on water and sediment movement in the watershed (Dang et al, 2020;Lei et al, 2020). Its main forms include water erosion, gravity erosion, and wind erosion (Poesen, 2018;Cui et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Slope–Gully–Stream Sediment Transport Process with Water and Gravity Erosion

2022

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Soil erosion has become a global problem with serious consequences. It is the source of sediment in rivers, and the subsequent sediment transport is important. Water erosion and gravity erosion, as common forms of soil erosion, have different subsequent sediment transport processes. Numerical simulations can reflect these processes well under different sediment yield types. This study applied the computational fluid dynamics and discrete element method (CFD-DEM) to examine the sediment transport following water erosion and gravity erosion. During the sediment transport process, the solid-phase particles in the gravity erosion case move at a greater speed during the initial stage. In the case of water erosion, a decrease in particle velocity on the slope occurs due to the accumulation of particles. The streamwise velocity distribution of the liquid phase conforms to the logarithmic distribution before the sediment transport process starts. Influenced by the solid-phase particles, the flow velocity near the bottom decreases significantly. The sediment transport rate peak in gravity erosion cases is greater than that in water erosion cases. Furthermore, in water erosion cases, when the slope is steep, there is no peak in the sections located at the inlet and outlet of a gully. The sediment transport rate in river sections shows a step form in the declining process.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Slope–Gully–Stream Sediment Transport Process with Water and Gravity Erosion

2022

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“…The vegetation coverage has increased from 31.6% in 1999 to 59.6% in 2013 (Chen et al, 2015), and the average soil erosion rate decreased from 3362 tkm 2 yr ‐1 in 2000 to 2405 tkm 2 yr ‐1 in 2008 (Fu et al, 2011). In addition, the average annual sediment load of Yellow River decreased from 1.6 billion tons during 1919–1959 to 250 million tons during 2000–2018 (Dang et al, 2020). The GFGP resulted in conversion of large amounts of farmland to forest and grassland, so a contradiction between the need for agricultural production and the reduction in farmland has gradually come to the fore (Lyu & Xu, 2020); this issue urgently needs to be solved.…”

Section: Introductionmentioning

confidence: 99%

“…tons during 2000-2018 (Dang et al, 2020). The GFGP resulted in conversion of large amounts of farmland to forest and grassland, so a contradiction between the need for agricultural production and the reduction in farmland has gradually come to the fore (Lyu & Xu, 2020); this issue urgently needs to be solved.…”

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confidence: 99%

“…For instance, a short generation and convergence time for runoff from extreme rainfall may create high-velocity flooding, causing disasters (Yaduvanshi et al, 2017). In this regard, extreme rainfall has undoubtedly become a threat to land security in the Loess Plateau (Dang et al, 2020), especially for projects such as the GLCP, which presents a considerable challenge.…”

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confidence: 99%

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Evaluation of the impact of the Gully Land Consolidation Project on runoff under extreme rainfall

et al. 2022

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Extreme rainfall is an important driver of soil erosion and land damage. The Gully Land Consolidation program (GLCP) was first launched in 2011 as a major land reclamation practice to increase farmland in the Loess Plateau of China. Studying the impact of artificial projects on hydrology can help humans to respond to the various water issues, but the assessment of the effects of the GLCP on extreme rainfallinduced water runoff at watershed scale is currently lacking. Our study used the soil and water assessment tool (SWAT) to evaluate the influence of the GLCP at different locations and areas on water runoff under extreme rainfall events in the Yanhe watershed. Results showed that: (1) the GLCP can improve the interception of surface runoff, with interception efficiency in downstream of the watershed approximately twice that at midstream and entire watershed as well as seven-times that at the upstream; (2) when GLCP measures are evenly distributed in a watershed, as the area of GLCP increases from 76.40 km 2 (1% of watershed area) to 382.01 km 2 (5%), the interception of surface runoff increases by 0.77 mm; (3) and the GLCP can increase soil infiltration and groundwater recharge. This research is expected to provide insights into the optimized layout of the GLCP at watershed scale. Correspondingly, policymakers can refer to this information in developing policies on the sustainable use of land.

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“…Specifically, the annual precipitation in the upper reaches of the Yellow River has an obvious increasing trend, while the middle and lower reaches have an obvious decreasing trend, that is to say, the extreme precipitation process in the Yellow River Basin tends to increase (such as the 7.20 rainstorm in Zhengzhou in 2021) [11]. All these would adversely affect the inter-annual and intra-annual distribution of runoff and sediment of the Yellow River [12], and pose a great threat to the flood control in the lower Yellow River (for example, the autumn flood of the Yellow River in 2021 caused by extreme precipitation is the most severe flood control situation in the Yellow River Basin in recent decades).…”

Section: Introductionmentioning

confidence: 99%

Response Relationship between the Upward or Downward Moving Distance of Main Stream Zone and Water and Sediment Conditions in Wandering Channels

Zhao

Jiang

et al. 2021

Water

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The change of water and sediment conditions in wandering channels has a great impact on the stability of river regime. The quantitative relationship between them is still unclear. The qualitative influence of water and sediment conditions on the river regime stability was analyzed by a model test. The response relationship between the upward or downward moving distance of the main stream zone and water and sediment conditions was quantitatively studied by using the measured water and sediment data and large-section data over the years. The results showed that when the upstream water and sediment inflow conditions change, the stability of a wandering channel with relatively stable river regime under the control of finite boundary will still change. When the river channel is at 1000 m3/s under the action of long-term small water, or silting thickness is about 0.53 m, the main stream next to the project moves upwards about 1170 m along the way. In the case of a large flood, such as 8000 m3/s, or scouring depth is about 0.39 m, the main stream next to the project moves downwards about 870 m along the way. The study provides a certain scientific basis for river regime stability and river flood control early warning, and provides a certain method reference for quantitative study of river regime evolution of other rivers at home and abroad.

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Prediction of Sediment Yield in the Middle Reaches of the Yellow River Basin Under Extreme Precipitation

Cited by 19 publications

References 61 publications

Numerical Simulation of Slope–Gully–Stream Sediment Transport Process with Water and Gravity Erosion

Numerical Simulation of Slope–Gully–Stream Sediment Transport Process with Water and Gravity Erosion

Evaluation of the impact of the Gully Land Consolidation Project on runoff under extreme rainfall

Response Relationship between the Upward or Downward Moving Distance of Main Stream Zone and Water and Sediment Conditions in Wandering Channels

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