scholarly journals Optimum of interlayers in reconstructed soil with Yellow River sediment for restoring subsided coal mined land to farmland

2021 ◽  
Author(s):  
Zhenqi Hu ◽  
Xiaotong Wang ◽  
Kevin McSweeney ◽  
Yong Li
Keyword(s):  
Field Experiments ◽  
River Sediment ◽  
Land Reclamation ◽  
Yellow River ◽  
Water Holding Capacity ◽  
The Yellow River ◽  
Cultivated Land ◽  
Yellow River Sediment ◽  
Reconstructed Soil ◽  
Water Holding

Underground coal mining causes land subsidence, a large area of cultivated land is destroyed. The Yellow River interlayer filling reclamation technology is the powerful way to restore cultivated land. Understanding the mechanism of action of interlayers in reconstructed soil filled with Yellow River sediments is essential to achieving sustainable land management in the Yellow River regions. Column experiments and Field experiments were conducted to optimum of interlayers in reconstructed soil with Yellow River sediment for restoring subsided coal mined land. Our findings show that the inclusion of interlayers in the sediment reduced water leakage and moisture evaporation, and improved the water-holding capacity of the material in comparison to conventional reconstructed soil profile (Ck2). When the 30 cm thickness of interlayer, putting 2 interlayers in sediment (T6) was the optimal profile with the highest water-holding capacity. In comparison to CK2, the migration rate of wet front decreases by 32.16%, the cumulative evaporation decreases by 16.29%, the volumetric water content of filling layer (θ_fl) increases by 121.56%, and the water-holding coefficient (CWR) increases by 59.47%. It is also proved by field experiments. The wheat and maize yields of T6 improved 51.84% and 54.80%, respectively, as compared with CK2, that closer to undisturbed farmland (CK1). This study provides a valuable framework for subsided land reclamation regarding the method of placing interlayers into Yellow River sediment for enhancing water retention and productivity.

Yellow River Sediment as a Soil Amendment for Amelioration of Saline Land in the Yellow River Delta

2014 ◽  
Vol 27 (6) ◽  
pp. 1595-1602 ◽  
Author(s):  
Weibing Mao ◽  
Shaozhong Kang ◽  
Yongshan Wan ◽  
Yuxia Sun ◽  
Xiaohua Li ◽  
...  
Keyword(s):  
Soil Amendment ◽  
River Sediment ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
The Yellow River ◽  
The Yellow River Delta ◽  
Yellow River Sediment ◽  
Saline Land

Study on Erodibility Change of the Yellow River Sediment Into the Sea in the Process of Consolidation

2010 ◽  
Author(s):  
Xiangmei Meng ◽  
Yonggang Jia ◽  
Wei Hou ◽  
Hui Liu ◽  
Zhongnian Yang
Keyword(s):  
Shear Stress ◽  
Tidal Flat ◽  
River Sediment ◽  
Yellow River ◽  
Decisive Role ◽  
Yellow River Delta ◽  
The Yellow River ◽  
Rise Rate ◽  
Yellow River Sediment ◽  
Consolidation Time

The erodibility change of estuarine sediment in the process of consolidation directly determines the resuspension and secondary migration of sediment, which plays an important decisive role in estuarine and coastal stability. The rapid deposition of Yellow River sediment into the sea was simulated on the tidal flat of the modern Yellow River delta, and the erodibility and physical-mechanical properties of the sediment at different consolidation time were measured in situ. The results show that the anti-erodibility of Yellow River sediment into the sea rapidly increases with consolidation time, and the critical erosion shear stress has already exceeded the value of the undisturbed tidal flat surficial sediment when the consolidation time extends as long as 8 hours. The critical erosion shear stress of the newly deposited sediment has a good positive correlation with bulk density, penetration resistance and shear strength, a good negative correlation with water content. The rise rate of measured critical erosion flow velocity of the Yellow River sediment into the sea with consolidation time is higher than the rise rate of calculated value using different formulas, and the former is 1.5–4.1 times as high as the latter.

scholarly journals Developing policy for the Yellow River sediment sustainable control

2016 ◽  
Vol 3 (2) ◽  
pp. 162-164 ◽  
Author(s):  
Shuai Wang ◽  
Bojie Fu ◽  
Wei Liang
Keyword(s):  
River Sediment ◽  
Yellow River ◽  
The Yellow River ◽  
Yellow River Sediment

Modeling the Yellow River sediment flux and its deposition patterns under climatological conditions

2013 ◽  
Vol 63 (6) ◽  
pp. 709-722 ◽  
Author(s):  
Jing Lu ◽  
Fangli Qiao ◽  
Xiaohua Wang ◽  
Yong Teng ◽  
Kyung Tae Jung ◽  
...  
Keyword(s):  
River Sediment ◽  
Yellow River ◽  
Sediment Flux ◽  
The Yellow River ◽  
Deposition Patterns ◽  
Yellow River Sediment

Kinetic study on the adsorption of arsenic in the Yellow River sediment with different gradation

2018 ◽  
Vol 122 ◽  
pp. 5-13
Author(s):  
Haihua Li ◽  
Qian Liang ◽  
Gui Wei Zhang ◽  
Zhengyang E
Keyword(s):  
Kinetic Study ◽  
River Sediment ◽  
Yellow River ◽  
The Yellow River ◽  
Yellow River Sediment

scholarly journals Multi-Scenario Analysis of Habitat Quality in the Yellow River Delta by Coupling FLUS with InVEST Model

2021 ◽  
Vol 18 (5) ◽  
pp. 2389
Author(s):  
Qinglong Ding ◽  
Yang Chen ◽  
Lingtong Bu ◽  
Yanmei Ye
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Habitat Quality ◽  
Scenario Analysis ◽  
Yellow River ◽  
The Yellow River ◽  
Cultivated Land ◽  
Invest Model ◽  
Unused Land ◽  
Dongying City

The past decades were witnessing unprecedented habitat degradation across the globe. It thus is of great significance to investigate the impacts of land use change on habitat quality in the context of rapid urbanization, particularly in developing countries. However, rare studies were conducted to predict the spatiotemporal distribution of habitat quality under multiple future land use scenarios. In this paper, we established a framework by coupling the future land use simulation (FLUS) model with the Intergrated Valuation of Environmental Services and Tradeoffs (InVEST) model. We then analyzed the habitat quality change in Dongying City in 2030 under four scenarios: business as usual (BAU), fast cultivated land expansion scenario (FCLE), ecological security scenario (ES) and sustainable development scenario (SD). We found that the land use change in Dongying City, driven by urbanization and agricultural reclamation, was mainly characterized by the transfer of cultivated land, construction land and unused land; the area of unused land was significantly reduced. While the habitat quality in Dongying City showed a degradative trend from 2009 to 2017, it will be improved from 2017 to 2030 under four scenarios. The high-quality habitat will be mainly distributed in the Yellow River Estuary and coastal areas, and the areas with low-quality habitat will be concentrated in the central and southern regions. Multi-scenario analysis shows that the SD will have the highest habitat quality, while the BAU scenario will have the lowest. It is interesting that the ES scenario fails to have the highest capacity to protect habitat quality, which may be related to the excessive saline alkali land. Appropriate reclamation of the unused land is conducive to cultivated land protection and food security, but also improving the habitat quality and giving play to the versatility and multidimensional value of the agricultural landscape. This shows that the SD of comprehensive coordination of urban development, agricultural development and ecological protection is an effective way to maintain the habitat quality and biodiversity.

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