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Article ; Online: A novel characterization on the interaction of soil and vegetation in a reclaimed area of opencast coalmine based on joint multi-fractal method

Wanzhi Li / Jinman Wang / Yafu Zhang / Min Zhang

Ecological Indicators, Vol 121, Iss , Pp 107094- (2021)

2021

Abstract: Soil and vegetation, as the basic structural unit of artificial ecosystems, play an important role in ecological restoration in opencast coal mining areas, and both exhibit a complex interaction. However, the traditional method cannot well characterize ... ...

Abstract	Soil and vegetation, as the basic structural unit of artificial ecosystems, play an important role in ecological restoration in opencast coal mining areas, and both exhibit a complex interaction. However, the traditional method cannot well characterize the inter action between the soil and vegetation. In order to reveal the interaction between soil and vegetation in the reclaimed area of opencast coalmine, and explore the interaction mechanism between soil and vegetation, the soil and vegetation data from 70 reclaimed points in Antaibao and Anjialing opencast coal mines in Shanxi province of China were selected to conduct an investigation study. Ten soil and three vegetation indicators were determined, and the joint multifractal method was innovatively introduced to characterize the relationships of soil and vegetation on multiple scales using joint multifractal spectra and grayscale images. The interaction between soil and vegetation can be clearly obtained using the joint multifractal method. The canopy density was negatively correlated with soil bulk density, silt content, and pH; whereas, it was positively correlated with rock content, sand content, total nitrogen, soil organic matter, available phosphorus, and available potassium content. The average diameter at breast height was negatively correlated with soil bulk density, clay content, and pH; however, it was positively correlated with silt content, sand content, total nitrogen, soil organic matter, available phosphorus, and available potassium content. The herb coverage was negatively correlated with rock content, silt content, clay content, pH, soil organic matter, available phosphorus and available potassium content. Soil bulk density and clay content showed negative correlation with herb coverage. Compared to the traditional method, the novel joint multifractal method can more accurately charecterize the correlations from multiple scales. This novel method can be used to study the interaction between soil and vegetation.
Keywords	Soil ; Vegetation ; Interaction ; Joint multifractal method ; Opencast coal mine ; Ecology ; QH540-549.5
Language	English
Publishing date	2021-02-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Tempo-spatial changes of ecological vulnerability in resource-based urban based on genetic projection pursuit model

Qian Tang / Jinman Wang / Zhaorui Jing

Ecological Indicators, Vol 121, Iss , Pp 107059- (2021)

2021

Abstract: Due to the intensification of large-scale mining and of human activities, the ecological integrity of resource-based cities has been severely damaged. Studying its ecological vulnerability (EV) will help improve the environmental degradation and ... ...

Abstract	Due to the intensification of large-scale mining and of human activities, the ecological integrity of resource-based cities has been severely damaged. Studying its ecological vulnerability (EV) will help improve the environmental degradation and ecosystem imbalance in the region and provide a decision-making basis for its sustainable development. In this paper, genetic projection pursuit and ecological vulnerability index model were used to quantitatively evaluate the EV of Datong from 2000 to 2017. This study shows that it is feasible to apply genetic projection pursuit on ecological vulnerability evaluation. This method avoids artificial assumptions, and thus provides objective results that successfully execute multi indicator evaluation process and analysis under non-linear systems in ecological environment. From 2000 to 2017, under the dual influence of national development plans and coal mining activities, Datong City's EV showed a downward trend, and the highest and lowest EV occurred in 2010 and 2017 respectively; the differences in natural conditions in different regions made the spatial distribution of EV high in the west and low in the east, the spatial variation was relatively stable, and the regions with large changes were concentrated in the Urban District, Zuoyun County and Lingqiu County; due to rapid industrialization and urbanization, the centroid of EV shifted to the southwest. The maximum offset was 3.81 km, and the EV distribution was uneven. Local governments should take corresponding measures in different ecologically vulnerable areas. In the buffer and transition zone, the idea of attaching importance to ecology should continue to be maintained and the ecological asset management models and mechanisms based on ecological protection should be actively explored. In the key ecological restoration area, efforts should be made to return farmland to forests (grass), accelerate the process of vegetation restoration, and rationally develop coal resources. In the absolute ecological protection ...
Keywords	Genetic projection pursuit ; Ecological vulnerability ; Ecological environment ; Centroid transfer ; Resource-based cities ; Datong city ; Ecology ; QH540-549.5
Subject code	910
Language	English
Publishing date	2021-02-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Variability in reconstructed soil bulk density of a high moisture content soil: a study on feature identification and ground penetrating radar detection

Hanxiao, Xu / Yingui, Cao / Gubai, Luo / Shufei, Wang / Jinman, Wang / Zhongke, Bai

Environmental earth sciences. 2022 May, v. 81, no. 9

2022

Abstract: The complex formation process of reconstructed soil triggers the high spatial variability of soil physical properties, for which traditional soil sampling methods are not applicable due to the destructive and time-consuming modes. Ground penetrating ... ...

Abstract	The complex formation process of reconstructed soil triggers the high spatial variability of soil physical properties, for which traditional soil sampling methods are not applicable due to the destructive and time-consuming modes. Ground penetrating radar (GPR) can collect continuous and high-resolution data flexibly, but the technology has rarely been employed to detect reconstructed soil properties in opencast coalmine regions. This study explored the applicability and accuracy of GPR in measuring reconstructed soil bulk density (RSBD) in southern dump, expanded western dump, and internal dump of the Antaibao open-pit mine, China. The variations of RSBD and the relationships between the dielectric constant and RSBD were analyzed based on ring knife sampling weighing, GPR detection, variance analysis, and fitting analysis. The results showed that (1) RSBD exhibited significant variations in different dumps and at different depths of the same profile. (2) RSBD differences in different dumps could be qualitatively analyzed based on the large-amplitude signals in GPR images. (3) When the soil volume moisture content ranged from 15 to 25%, RSBD was found to be negatively correlated with the dielectric constant. GPR has the potential to be widely employed to detect RSBD in reclaimed lands, which can contribute to the development of non-destructive quality testing of land reclamation.
Keywords	dielectric properties ; land restoration ; soil density ; variance ; water content ; China
Language	English
Dates of publication	2022-05
Size	p. 249.
Publishing place	Springer Berlin Heidelberg
Document type	Article
ZDB-ID	2493699-6
ISSN	1866-6299 ; 1866-6280
ISSN (online)	1866-6299
ISSN	1866-6280
DOI	10.1007/s12665-022-10365-1
Database	NAL-Catalogue (AGRICOLA)

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Article: Integrated life cycle assessment of improving saline-sodic soil with flue gas desulfurization gypsum

Li, Jiayan / Jinman Wang

Journal of cleaner production. 2018 Nov. 20, v. 202

2018

Abstract: A large quantity of flue gas desulfurization gypsum (FGDG), a by-product of removing sulfur from combustion gases in coal-fired power generation plants, was produced in the world. Improving saline-sodic soils with FGDG is one of the effective ways to ... ...

Abstract	A large quantity of flue gas desulfurization gypsum (FGDG), a by-product of removing sulfur from combustion gases in coal-fired power generation plants, was produced in the world. Improving saline-sodic soils with FGDG is one of the effective ways to utilize FGDG. However, the use of FGDG has severe impacts on the environment. With growing application of FGDG for improving soils, there is an increasing necessity to analyze the environmental impact on the entire agricultural application process. Life cycle assessment (LCA) is useful for comparing the potential risks of different environmental impact categories and stages. Traditional LCA methods have some limits in comparing various schemes, while the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) has its unique advantages in multi-objective decision-making. Therefore, this study identified and compared the environmental impacts of four alternative schemes in three stages using LCA combined with TOPSIS. In this study, the environmental impact of improving 1 ha saline-sodic soil was assessed, and a sensitivity analysis was conducted to analyze the effects of the changes in heavy metals in FGDG and in irrigation. The highest impact category was water consumption, with a weighted environmental impact value of 2.20 × 10−1 and a contribution rate of 42.216%. The second-highest environmental impact category was soil toxicity, with a weighted environmental impact potential value of 8.04 × 10−2 and a contribution rate of 15.429%. The soil toxicity was mostly from the application stage, while the water and energy consumption were mainly from the irrigation of planting stage. Acidification and eutrophication were mainly from fertilizer applications. Effective measures, including scientific use of fertilizers and pesticide, reasonable irrigation and strict control of heavy metals in FGDG should be employed to mitigate environmental risks during the agricultural application of FGDG. This study constructed a framework for the environmental impacts of improving saline-sodic soils with FGDG integrated with TOPSIS, and can be considered as an effort to advance the application of LCA.
Keywords	acidification ; byproducts ; combustion ; decision making ; energy ; environmental impact ; eutrophication ; fertilizer application ; fertilizers ; flue gas desulfurization ; gases ; gypsum ; heavy metals ; irrigation ; life cycle assessment ; pesticides ; planting ; power generation ; risk ; saline sodic soils ; soil toxicity ; sulfur
Language	English
Dates of publication	2018-1120
Size	p. 332-341.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0959-6526
DOI	10.1016/j.jclepro.2018.08.062
Database	NAL-Catalogue (AGRICOLA)

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Article: Effects of surface coal mining and land reclamation on soil properties: A review

Feng, Yu / Jinman Wang / Zhongke Bai / Lucy Reading

Earth-science reviews. 2019 Apr., v. 191

2019

Abstract: Opencast coal mining has a series of consequences on land resources and places enormous pressure on the ecological environment. Stripping, excavation, transportation and dumping have different effects on soil physical, chemical and biological properties. ...

Abstract	Opencast coal mining has a series of consequences on land resources and places enormous pressure on the ecological environment. Stripping, excavation, transportation and dumping have different effects on soil physical, chemical and biological properties. Moreover, the reconstructed landscape produces increased small-scale spatial heterogeneity of mined soils. Currently, growing concerns for the negative consequences of mining have highlighted the importance of reclamation in minesoil studies. This review has examined the mechanisms of coal mining and reclamation that affect soil properties (physical, chemical, biological) and described soil development in reclamation, with an emphasis on the reclaimed minesoil (RMS) properties of reclamation sites. The major conclusions of this review were: (i) The randomness of soil dumping increased the heterogeneity of minesoil properties, which in turn increased the complexity of reclamation practice. (ii) The negative or positive consequences of mining and reclamation processes on RMS need to be recognized by scientific observations such as soil property multi-index analysis and soil chronosequences, on which the minesoil reconstruction practice are based. (iii) Five phases of reclamation (i.e., geomorphic reshaping, soil reconstruction, hydrological stability, vegetation restoration, and landscape rebuilding) should be considered as a comprehensive system for the reconstruction of minesoils. (iv) The application of new technologies (e.g., micro-terrain reshaping and soil non-destructive detection) and new studies (e.g., systematic study, rebuilding animal habitat, and biodiversity research) to minesoil recovery practice would enhance the new concepts of land reclamation and ecological restoration in mining areas.
Keywords	animals ; biodiversity ; chronosequences ; coal ; habitats ; hydrology ; land restoration ; landscapes ; mined soils ; mining ; soil properties ; spatial variation
Language	English
Dates of publication	2019-04
Size	p. 12-25.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1792-9
ISSN	0012-8252
ISSN	0012-8252
DOI	10.1016/j.earscirev.2019.02.015
Database	NAL-Catalogue (AGRICOLA)

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Article: Life cycle assessment of opencast coal mine production: a case study in Yimin mining area in China

Zhang, Li / Jinman Wang / Yu Feng

Environmental science and pollution research international. 2018 Mar., v. 25, no. 9

2018

Abstract: China has the largest coal production in the world due to abundant resource requirements for economic development. In recent years, the proportion of opencast coal mine production has increased significantly in China. Opencast coal mining can lead to a ... ...

Abstract	China has the largest coal production in the world due to abundant resource requirements for economic development. In recent years, the proportion of opencast coal mine production has increased significantly in China. Opencast coal mining can lead to a large number of environmental problems, including air pollution, water pollution, and solid waste occupation. The previous studies on the environmental impacts of opencast coal mine production were focused on a single production process. Moreover, mined land reclamation was an important process in opencast coal mine production; however, it was rarely considered in previous research. Therefore, this study attempted to perform a whole environmental impact analysis including land reclamation stage using life cycle assessment (LCA) method. The Yimin opencast coal mine was selected to conduct a case study. The production of 100 tons of coal was used as the functional unit to evaluate the environmental risks in the stages of stripping, mining, transportation, processing, and reclamation. A total of six environmental impact categories, i.e., resource consumption, acidification, global warming, solid waste, eutrophication, and dust, were selected to conduct this assessment. The contribution rates of different categories of environmental impacts were significantly different, and different stages exhibited different consumption and emissions that gave rise to different environmental effects. Dust was the most serious environmental impact category, and its contribution rate was 36.81%, followed by global warming and acidification with contribution rates of 29.43% and 22.58%, respectively. Both dust and global warming were mainly affected in mining stage in Yimin opencast coal mine based on comprehensive analysis of environmental impact. Some economic and feasible measures should be used to mitigate the environmental impacts of opencast coal mine production, such as water spraying, clean transportation, increasing processing efficiency, and improving mining technologies. This study can be considered as a useful reference for a deeper understanding of key environmental impacts related to the whole coal production in opencast coal mine.
Keywords	acidification ; air pollution ; case studies ; coal ; dust ; economic development ; emissions ; environmental impact ; eutrophication ; global warming ; land restoration ; life cycle assessment ; mining ; risk ; solid wastes ; spraying ; transportation ; water pollution ; China
Language	English
Dates of publication	2018-03
Size	p. 8475-8486.
Publishing place	Springer Berlin Heidelberg
Document type	Article
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-017-1169-6
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

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Article: Effects of land subsidence resulted from coal mining on soil nutrient distributions in a loess area of China

Jing, Zhaorui / Jinman Wang / Yucheng Zhu / Yu Feng

Journal of cleaner production. 2018 Mar. 10, v. 177

2018

Abstract: Underground coal-mining results in severe land subsidence then changes soil nutrient distributions. Soil organic matter (SOM) and total nitrogen (TN) are critical indicators of soil quality and play a key role for plant growth. However, fewer scholars ... ...

Abstract	Underground coal-mining results in severe land subsidence then changes soil nutrient distributions. Soil organic matter (SOM) and total nitrogen (TN) are critical indicators of soil quality and play a key role for plant growth. However, fewer scholars pay attention to the soil nutrient distributions in mining subsidence areas. In this study, a total of 64 soil sampling points, taken from 4 different plots (one unmined plot, two subsided plots and one reclaimed plot), were collected from No.3 Anjialing underground coal mine in the loess area of China. SOM and TN at the depths of 0–20, 20–40, 40–60 and 60–80 cm in these sampling plots were measured. The classical statistics and geo-statistics were used to analyze the vertical and horizontal spatial variability of SOM and TN. The mechanisms of the effects of coal mining subsidence on soil nutrient distribution were revealed based on the distribution of the surface cracks of subsided plots. All of SOM and TN at the depth of 0–20 cm in subsided plots were less than those in unmined plot. Below the depth of 20 cm, TN in subsided plots were higher than those in unmined plot and SOM were less than those in unmined plot. SOM in reclaimed plot were higher than those in subsided plots; however, TN did not exhibit a clear regularity. Land subsidence increased horizontal spatial heterogeneity of SOM and TN distributions. The crack width, crack depth and the distance between sampling point and edge of crack were the main influence factors resulting in horizontal spatial heterogeneity of SOM and TN. This study can provide a theoretical and technical reference for land rehabilitation in subsided lands in loess area.
Keywords	coal ; land restoration ; loess ; mining ; nitrogen content ; plant growth ; soil nutrients ; soil organic matter ; soil quality ; soil sampling ; spatial variation ; statistics ; subsidence ; China
Language	English
Dates of publication	2018-0310
Size	p. 350-361.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0959-6526
DOI	10.1016/j.jclepro.2017.12.191
Database	NAL-Catalogue (AGRICOLA)

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Article: Environmental load of solid wood floor production from larch grown at different planting densities based on a life cycle assessment

Hu, Siying / Jinman Wang / Minghui Guo / Xin Guan

Journal of forestry research. 2018 Sept., v. 29, no. 5

2018

Abstract: As one of the main structural units in a building, a solid wood floor has significant strategic research value for low-carbon energy saving. Taking the production line of a solid larch wood floor as a case study, we assessed the environmental load during ...

Abstract	As one of the main structural units in a building, a solid wood floor has significant strategic research value for low-carbon energy saving. Taking the production line of a solid larch wood floor as a case study, we assessed the environmental load during production based upon a life cycle assessment. Using GaBi 6.0 software, we analyzed the associated carbon sequestration during floor production, with the initial planting density serving as the disturbance factor in a modular analysis. The results indicated that the cutting and finishing steps have relatively intense, negative influences on the environment, whereas transportation, ripping, and trimming do not. Additionally, recycling biomass waste has the potential to reduce greenhouse gas emissions. When the initial planting density was 3.0 × 3.0 m, carbon sequestration was relatively high. Although the emissions of freshwater pollutants, volatile organic compounds, and fine particulate matter (matter with a 2.5-μm diameter) were comparatively high, the reduction of greenhouse gas emissions was still excellent at this planting density.
Keywords	biomass ; carbon sequestration ; case studies ; computer software ; cutting ; energy conservation ; finishing ; freshwater ; greenhouse gas emissions ; life cycle assessment ; particulates ; plant density ; planting density ; pollutants ; recycling ; ripping ; transportation ; volatile organic compounds ; wastes ; wood
Language	English
Dates of publication	2018-09
Size	p. 1443-1448.
Publishing place	Springer Berlin Heidelberg
Document type	Article
ZDB-ID	2299615-1
ISSN	1993-0607 ; 1007-662X
ISSN (online)	1993-0607
ISSN	1007-662X
DOI	10.1007/s11676-017-0529-x
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Simulation and Prediction of Ion Transport in the Reclamation of Sodic Soils with Gypsum Based on the Support Vector Machine

Jinman Wang / Zhongke Bai / Peiling Yang

The Scientific World Journal, Vol

2014 Volume 2014

Keywords	Science ; Q ; Science (General) ; Q1-390
Publishing date	2014-01-01T00:00:00Z
Publisher	Hindawi Publishing Corporation
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Simulation and Prediction of Ion Transport in the Reclamation of Sodic Soils with Gypsum Based on the Support Vector Machine

Jinman Wang / Zhongke Bai / Peiling Yang

The Scientific World Journal, Vol

2014 Volume 2014

Abstract: The effect of gypsum on the physical and chemical characteristics of sodic soils is nonlinear and controlled by multiple factors. The support vector machine (SVM) is able to solve practical problems such as small samples, nonlinearity, high dimensions, ... ...

Abstract	The effect of gypsum on the physical and chemical characteristics of sodic soils is nonlinear and controlled by multiple factors. The support vector machine (SVM) is able to solve practical problems such as small samples, nonlinearity, high dimensions, and local minima points. This paper reports the use of the SVM regression method to predict changes in the chemical properties of sodic soils under different gypsum application rates in a soil column experiment and to evaluate the effect of gypsum reclamation on sodic soils. The research results show that (1) the SVM soil solute transport model using the Matlab toolbox represents the change in Ca2+ and Na+ in the soil solution and leachate well, with a high prediction accuracy. (2) Using the SVM model to predict the spatial and temporal variations in the soil solute content is feasible and does not require a specific mathematical model. The SVM model can take full advantage of the distribution characteristics of the training sample. (3) The workload of the soil solute transport prediction model based on the SVM is greatly reduced by not having to determine the hydrodynamic dispersion coefficient and retardation coefficient, and the model is thus highly practical.
Keywords	Technology ; T ; Medicine ; R ; Science ; Q
Subject code	310
Language	English
Publishing date	2014-01-01T00:00:00Z
Publisher	Hindawi Limited
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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