北方草原露天煤矿区植被退化因素分析

doi:10.19741/j.issn.1673-4831.2018.0155

Abstract

Abstract:

The vegetation degradation in opencast coal mines is increasingly serious, which causes impacts on the environment. Therefore, it is of great significance to determine the main factors of vegetation degradation so as to implement precision prevention. Shengli and Pingzhuang coal mines were selected as study areas. Normalized difference vegetation index (NDVI) was employed to indicate vegetation degradation. The entropy weight was integrated with grey relational analysis to establish the entropy-grey relation model by which the relativity between NDVI and land excavation, land occupation, desertification and soil erosion were analyzed. The main factors of land degradation were determined based on the rank of relativity. The results show that:(1) The ranking of relativity of different factors in Shengli coal mine area is:land occupation (0.294 7) > desertification (0.155 5) > land excavation (0.151 0) > soil erosion (0.119 3); while in Pingzhuang coal mining area is:land excavation (0.169 3) > land occupation (0.163 7) > soil erosion (0.150 5) > desertification (0.103 4). (2) The main factors of vegetation degradation in opencast coal mines are land excavation and land occupation. (3) Although the factors of desertification and soil erosion have less impact on vegetation degradation than land excavation and land occupation, they should not be ignored. Some measures have been proposed based on the results, which could help to avoid blindness during the prevention of vegetation degradation.

Key words: vegetation degradation, entropy-gray relation, factor analysis, opencast coal mine area

CLC Number:

X171.4

YU Hao-chen, MU Shou-guo, BIAN Zheng-fu, HOU Jing, WU Ying-ju, WANG Xiao-yu, ZHOU Jia. Analysis for Vegetation Degradation Factors in Opencast Coal Mines in Northern Grass-Land Area, China[J]. Journal of Ecology and Rural Environment, 2019, 35(1): 1-8.

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Analysis for Vegetation Degradation Factors in Opencast Coal Mines in Northern Grass-Land Area, China

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