Farmland damage and its impact on the overlapped areas of cropland and coal resources in the eastern plains of China

Hu, Zhenqi; Yang, Guanghua; Xiao, Wu; Li, Jing; Yang, Yaoqi; Yu, Yang

doi:10.1016/j.resconrec.2014.01.002

Cited by 77 publications

(46 citation statements)

References 7 publications

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“…Because the mining area in eastern China is an important grain-producing area and coal-production base with a high water level, land subsidence causes water accumulation in a large area and leads to the loss of cultivability of a large area of productive, cultivated land [8,9]. The mining subsidence area is increasing at a rate of 70,000 ha per year [10], and the loss of arable land because of subsidence will continue to increase. This trend exacerbates the above contradiction.…”

Section: Introductionmentioning

confidence: 99%

Soil Quality Change after Reclaiming Subsidence Land with Yellow River Sediments

Duo

2018

Sustainability

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With continuous population growth and decreasing cultivated land area, China’s food security is greatly threatened. Additionally, coal mining in China is primarily underground mining, which causes land subsidence and destroys existing cultivated land. This effect aggravates the contradiction between a growing population and a shrinking area of cultivated land. The purpose of this study was to introduce a method of filling reclamation with Yellow River sediments to restore farmland and realize the sustainable utilization of cultivated land. The properties of the soil and crop yields in reclaimed farmland were assessed. This study examined farmland reclaimed with Yellow River sediments at an experimental site located in Jining City, Shandong Province, China. Filling reclamation procedures with Yellow River sediments were applied. The reclaimed farmland (RF) and unaltered farmland (CK) were continuously monitored for three years, and the soil was sampled six times. A total of 180 soil samples were collected from RF and CK. The soil properties were measured at three depths: 0–20 cm, 20–50 cm, and 50–80 cm. Crop yields were monitored regularly. The results indicate that filling reclamation with Yellow River sediments is an effective method for restoring farmland. The RF and CK soils were weakly alkaline, non-saline soils. The RF soil was suitable for the growth of local crops. With an increasing number of farming years, both the quality of cultivated land and crop yields have increased. Therefore, filling reclamation with Yellow River sediments is an effective way to realize the sustainable utilization of cultivated land.

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Section: Introductionmentioning

confidence: 99%

Soil Quality Change after Reclaiming Subsidence Land with Yellow River Sediments

Duo

2018

Sustainability

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“…According to previous research results, after land rehabilitation in coal mining subsidence areas, the main factors limiting crop growth are as follows (Hu et al ., ; Kundu & Ghose, ): (a) a thin surface soil layer that cannot provide a suitable condition for crop growth and adequate water for the crop root system; (b) the poor water‐holding capacity of filling materials, such as CG, which limits the upward water movement from the groundwater supply, resulting in water shortage; (c) poor soil air permeability, leading to poor root aeration and consequently impacting the growth of crop root system. Moreover, the high water content limits the metabolic activity of soil microorganisms, resulting in decreased organic matter decomposition and the decline of soil fertility.…”

Section: Discussionmentioning

confidence: 99%

The effects of coal gangue and fly ash on the hydraulic properties and water content distribution in reconstructed soil profiles of coal‐mined land with a high groundwater table

Wang

Bai

et al. 2016

Hydrological Processes

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Soil water systems have been severely degraded in coal‐mined and subsiding land, where a shallow groundwater table is also present. The present paper discussed the effects of fly ash (FA) and coal gangue (CG) as filling materials on the hydraulic properties and water content distribution in a profile for the purpose of rehabilitating subsided lands. The saturated water content, water characteristic curve, and water diffusivity of local soil, FA, CG, and a mixture of FA and CG (“mixed filling”) were characterized. A column experiment was conducted to investigate the changes of water content in profiles reconstructed from the combination of soil and filling materials, including soil only, FA, CG, and a mixture of FA and CG, which were used to fill the lower part of the reconstructed profile. The mixture of FA and CG was found to possess similar hydraulic properties to those of the soil, particularly high water‐holding capacity and permeability. Moreover, the volumetric water contents in the whole profile containing the mixture of FA and CG were consistent with those of the profile reconstructed with soil only. As a result, it is recommended to adopt the mixture of FA and CG for reconstructing the lower profile of the land to alleviate or rehabilitate subsided land in coal mines.

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“…Mineral resources hold a significant position in economic development as a result of their importance for both raw materials and energy (Hu et al 2014;Xiao et al 2018aXiao et al , 2019a. The demand for mineral resources has increased significantly with the growth of industry and urbanization, leading to a greater need for mining.…”

Section: Introductionmentioning

confidence: 99%

A review of UAV monitoring in mining areas: current status and future perspectives

Ren

Zhao

Xiao

et al. 2019

Int J Coal Sci Technol

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195

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With the emergence and development of unmanned aerial vehicles (UAVs), different sensors have become more miniaturized and intelligent. UAVs equipped with various sensors are now an important approach for acquiring spatial data. Many advantages, such as low cost, short revisiting cycle, flexibility and high precision, have made UAVs powerful tools in geological, agricultural, ecological and forestry growth monitoring, as well as evaluation. Now, UAVs are a hotspot in scientific research. Their application in mining areas (MA), although still in its infancy, is developing rapidly in terms of speed, scale and service scope. This research examines aspects such as UAV platforms, different sensors and their application fields, as well as reviewing the advances of scientific research in MA at the present time. By combining current research and the functions of multiple sensors, an application framework for UAV monitoring in MA is constructed. Finally, the challenge and prospects for the development of UAVs and sensors are also considered. This research hopes to provide a technical reference, expanding the knowledge and recognition of UAV monitoring in MA, as well as an assessment of applications in mining, reclamation and environment.

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Farmland damage and its impact on the overlapped areas of cropland and coal resources in the eastern plains of China

Cited by 77 publications

References 7 publications

Soil Quality Change after Reclaiming Subsidence Land with Yellow River Sediments

Soil Quality Change after Reclaiming Subsidence Land with Yellow River Sediments

The effects of coal gangue and fly ash on the hydraulic properties and water content distribution in reconstructed soil profiles of coal‐mined land with a high groundwater table

A review of UAV monitoring in mining areas: current status and future perspectives

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