Do reconstructed landforms have multifractal characteristics? A case study at an opencast coalmine dump in the loess area of China

Feng, Yongzhong; Wang, Jin Man; Zhang, Li; Bai, Zhongke; Sun, Haoran

doi:10.1016/j.catena.2020.104925

Cited by 3 publications

(1 citation statement)

References 44 publications

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“…In this case, the natural groundwater dynamic condition and the relationship between recharge, runoff, and drainage of groundwater in the mining district will be changed (Dong et al, 2009;Adhikary and Guo, 2015;. The change in groundwater flow will modify the hydrogeochemical environment; mining activities will lead to serious deterioration of groundwater quality and cause a series of eco-environmental problems (Nordstrom, 2011;Li et al, 2018;Feng et al, 2019). Therefore, understanding hydrological cycle processes, including water origin, evaporation, and hydraulic connection between water bodies, is significant for the rational exploitation and utilization of water resources and local eco-environment protection, especially in the mining district.…”

Section: Introductionmentioning

confidence: 99%

Influence of mining activities on hydrological processes in the mining district, Loess Plateau: insights from spatio-temporal variations of δD and δ18O

Zhang,

Yang

et al. 2024

Front. Environ. Sci.

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Under the influence of mining activities, investigating hydrological processes is an important cornerstone of water resources and eco-environment protection. In this study, the spatio-temporal variations of stable isotopic compositions (δD and δ18O) of river water and groundwater in five periods of a hydrological year were analyzed to identify the origin and hydraulic connection of water bodies in the mining district under mining disturbance. The δD and δ18O indicate that the water bodies in the study area are mainly recharged by local precipitation and undergo evaporation. There is a close hydraulic connection between river water, mine water, and groundwater, and the deep confined water is affected by the river water and phreatic water due to the developing water-conducting fractures. The δ18O of phreatic water in each period is depleted in the southwest and enriched in the northeast of the study area. The δ18O of confined water has an obvious spatial variation in the wet season due to the combined effects of opencast working and underground mining, whereas uniform spatial variation is observed in the dry season. Compared with the dry season, mining disturbances have a greater impact on river water and groundwater in the wet season. The difference in spatial variation of δ18O between phreatic and confined water may be attributed to the easier recovery of phreatic water than confined water after mining disturbance. This finding provides important information about the hydrological characteristics of the Pingshuo mining district.

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Section: Introductionmentioning

confidence: 99%

Influence of mining activities on hydrological processes in the mining district, Loess Plateau: insights from spatio-temporal variations of δD and δ18O

Zhang,

Yang

et al. 2024

Front. Environ. Sci.

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Multi-fractal characteristics of reconstructed landform and its relationship with soil erosion at a large opencast coal-mine in the loess area of China

Shi

Wang

et al. 2021

Geomorphology

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Remote Sensing Monitoring of Vegetation Reclamation in the Antaibao Open-Pit Mine

Bai

et al. 2022

Remote Sensing

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After the regreening of the open-pit mine dump, vegetation usually needs to be managed and protected manually for several years before it reaches stability. Due to the spontaneous combustion of coal gangue, surface collapse, and other reasons, secondary damage may occur at any time. Regreening monitoring plays a vital role in the restoration and reconstruction of the mining ecosystem and can provide support for the timely replenishment of seedlings in the damaged area. In this study, remote sensing images were collected from 1986 to 2020 to obtain the NDVI distribution of dumps in the Antaibao open-pit coal mine. In order to obtain the overall growth law of regreening vegetation over time, the study adopted the unary regression analysis method and tested the correlation between NDVI and time by the Pearson correlation coefficient. However, through the Sen+Mann–Kendall trend analysis, it was found that there were differences in the trends of NDVI within the same dump. Next, by means of the Mann–Kendall mutation test and interactive interpretation, information, such as stable nodes of different regreening vegetation and vegetation growth patterns in degraded areas, were obtained. Through the above methods, the following conclusions were drawn: (1) The earlier the dumps were regreened, the more the areas were covered by significantly improved vegetation. In this study: 97.31% (the proportion of significantly improved vegetation in the south dump) >95.58% (the proportion in the west dump) >86.56% (the proportion in the inner dump) >79.89% (the proportion in the west expansion dump). (2) Different vegetation types have different time nodes for reaching stability. It takes about three years for wood, shrub, and a mix of grass, shrub, and wood to reach stability, but only one year for grass. (3) The destruction in mining areas is expansive and repeatable. Monitoring the growth patterns of regreening vegetation is conducive to understanding the reclamation effect, and provides a scientific basis for land reclamation planning and land management policies in the mining area. At the same time, the trend analysis method in this study can quickly extract problem areas after dump regreening and is applicable in most dumps.

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Do reconstructed landforms have multifractal characteristics? A case study at an opencast coalmine dump in the loess area of China

Cited by 3 publications

References 44 publications

Influence of mining activities on hydrological processes in the mining district, Loess Plateau: insights from spatio-temporal variations of δD and δ18O

Influence of mining activities on hydrological processes in the mining district, Loess Plateau: insights from spatio-temporal variations of δD and δ18O

Multi-fractal characteristics of reconstructed landform and its relationship with soil erosion at a large opencast coal-mine in the loess area of China

Remote Sensing Monitoring of Vegetation Reclamation in the Antaibao Open-Pit Mine

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