Construction and analysis of a method for grading long-term vegetation carbon sink in waste dumps of an open-pit coal mine

被引：0

作者：

Yang F. ^{[1
,2
]}

Cui K. ^{[1
]}

Zhang C. ^{[1
]}

Li J. ^{[1
]}

Wang J. ^{[1
]}

Du T. ^{[1
]}

Zhang H. ^{[1
]}

机构：

[1] College of Geoscience and Surveying Engineering, China University of Mining and Technology (Beijing), Beijing

[2] Key Laboratory of Mine Environmental Monitoring and Improving around Poyang Lake of Ministry of Natural Resources, East China University of Technology, Nanchang

来源：

Meitiandizhi Yu Kantan/Coal Geology and Exploration | 2024年 / 52卷 / 05期

关键词：

ecological environment assessment; grading; open-pit coal mine; spoil dumps; vegetation carbon sink;

D O I：

10.12363/issn.1001-1986.24.01.0023

中图分类号：

学科分类号：

摘要：

Vegetation carbon sink serves as a crucial indicator for the ecological assessment of an open-pit coal mine. The accurate inversion and grading of vegetation carbon sink play a significant role in exploring the ecological restoration of coal mines. This study proposed a method for grading vegetation carbon sink of an open-pit coal mine based on the particle swarm optimization (PSO) algorithm. Specifically, using a light use efficiency (LUE) model, this study first determined the spatio-temporal distributions of the 2005‒2020 vegetation carbon sink in the waste dumps of the Shengli No.1 open-pit coal mine through inversion based on Landsat images and meteorological data. Then, by developing objective functions and conducting iterative computation, this study ascertained the ideal LUE and optimal temperature and precipitation conditions in the coal mine, followed by the quantification and development of criteria for vegetation carbon sink grading. Finally, this study graded the vegetation carbon sink results of the waste dumps during various periods and analyzed the spatial-temporal changes in the areas of varying grades and their proportions. The key findings are as follows: (1) From 2005 to 2020, the carbon sequestration capacity of vegetation in the study area showed an upward trend, with average annual growth and growth rate of 1.43 gC/(m2·a) and 6.97%, respectively; (2) After ecological restoration of waste dumps in the coal mine, the vegetation carbon sink values increased significantly, and zones with extremely high and high carbon sink values gradually expanded; (3) The ecological restoration effects differed across various waste dumps in the coal mine, proved to be the best in southern and northern waste dumps, followed by the marginal waste dump on the margin, with the inner waste dumps exhibiting the poorest ecological restoration effects. By 2020, in southern and northern waste dumps, zones with extremely high carbon sink values covered areas of 0.94 km2 and 0.92 km2, respectively, accounting for 92% and 94% of the total areas of the dumps, respectively. In the marginal waste dump, zones with extremely high and high carbon sink values occupied an area of 3.64 km2, representing 66% of the total area of the waste dump. In the inner waste dump, the area of zones with extremely high carbon sink values increased by 1.22 km2, accounting for up to 31% of the total area. In 2020, there was no zone with extremely low carbon sink values anymore in the southern, northern, and marginal waste dumps. This study will provide both critical data for the ecological assessment of the open-pit coal mine and a scientific basis for developing ecological restoration strategies for the mining area. © 2024 Science Press. All rights reserved.

引用

页码：139 / 150

页数：11

共 31 条

[1]

LI Hongzhe, Spatiotemporal patterns of vegetation carbon sinks and carbon storage assessment in the yellow river basin, (2023)

[2]

XU Yong, HUANG Wenting, GUO Zhendong, Et al., Spatio–temporal variation of vegetation net ecosystem productivity and relative contribution of driving forces in southwest China from 2000 to 2020[J], Research of Environmental Sciences, 36, 3, pp. 557-570, (2023)

[3]

ZHANG Rui, ZHAO Xueyong, ZUO Xiao'an, Et al., Drought–induced shift from a carbon sink to a carbon source in the grasslands of Inner Mongolia，China[J], CATENA, 195, (2020)

[4]

ZHAO Junfang, Jianyong MA, Yujie ZHU, Evaluating impacts of climate change on net ecosystem productivity (NEP) of global different forest types based on an individual tree–based model FORCCHN and remote sensing[J], Global and Planetary Change, 182, (2019)

[5]

ZHANG Li, Huadong GUO, Gensuo JIA, Et al., Net ecosystem productivity of temperate grasslands in Northern China： An up-scaling study[J], Agricultural and Forest Meteorology, 184, (2014)

[6]

YANG Jinyan, YANG Kai, TIAN Liyan, Et al., Environmental impacts of mining activities in China and the corresponding management and remediation strategies： An overview[J], Environmental Science & Technology, 35, Sup.2, pp. 182-188, (2012)

[7]

LI Quansheng, LI Jun, Et al., Extraction of the impact of mining on vegetation changes and quantitative analysis of ecological cumulative effects[J], Journal of China Coal Society, 47, 6, pp. 2420-2434, (2022)

[8]

YANG Fei, WANG Jinyang, ZHANG Chengye, Et al., The impact of human activities on net primary productivity in a grassland open–pit mine：The case study of the Shengli mining area in Inner Mongolia，China[J], Land, 11, 5, (2022)

[9]

LIU Ying, WEI Jiali, BI Yinli, Et al., Temporal and spatial dynamic change analysis of carbon storage in Hongshaquan open–pit coal mine[J], Journal of China Coal Society, 47, Sup.1, pp. 214-224, (2022)

[10]

AHIRWAL J，, MAITI S K., Assessment of carbon sequestration potential of revegetated coal mine overburden dumps： A chronosequence study from dry tropical climate[J], Journal of Environmental Management, 201, pp. 369-377, (2017)

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