草原区露天煤矿植被覆盖度时空演变与驱动因素分析
采用多时相Landsat TM遥感数据,借助于植被指数与植被覆盖度,基于不同时序植被覆盖度格点回归斜率、标准差和基末年等级转换矩阵等,分析了研究区植被覆盖度空间异质性及其驱动机制,剖析了采复联动下研究区、开采区和复垦区植被覆盖度变化趋势和波动程度,进而揭示随着时间变化采复活动与植被覆盖度间的响应。研究结果表明:不同年份研究区植被覆盖度及其等级空间分布整体上具有一定相似性,矿山采复活动在一定程度上打破了区域植被覆盖度时空演变格局;研究区植被覆盖度以中(Ⅳ等)、中低(Ⅲ等)为主,按多年均值计算,两者之和占研究区总面积的80%以上;植被覆被度呈增加和减少的区域面积比为2∶3,相关系数在-0.9266...
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Published in | 农业工程学报 Vol. 32; no. 17; pp. 233 - 241 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
安徽理工大学地球与环境学院,淮南,232001%安徽农业大学经济管理学院,合肥,230036%中国科学院遥感与数字地球研究所,北京,100094%中国农业大学理学院,北京,100193%中国农业大学资源与环境学院,北京,100193
2016
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Subjects | |
Online Access | Get full text |
ISSN | 1002-6819 |
DOI | 10.11975/j.issn.1002-6819.2016.17.031 |
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Summary: | 采用多时相Landsat TM遥感数据,借助于植被指数与植被覆盖度,基于不同时序植被覆盖度格点回归斜率、标准差和基末年等级转换矩阵等,分析了研究区植被覆盖度空间异质性及其驱动机制,剖析了采复联动下研究区、开采区和复垦区植被覆盖度变化趋势和波动程度,进而揭示随着时间变化采复活动与植被覆盖度间的响应。研究结果表明:不同年份研究区植被覆盖度及其等级空间分布整体上具有一定相似性,矿山采复活动在一定程度上打破了区域植被覆盖度时空演变格局;研究区植被覆盖度以中(Ⅳ等)、中低(Ⅲ等)为主,按多年均值计算,两者之和占研究区总面积的80%以上;植被覆被度呈增加和减少的区域面积比为2∶3,相关系数在-0.9266~0.4805之间,斜率正值范围内相关性并不显著,而负值范围的-0.9266~-0.895呈现不同程度显著性相关;露天采区、排土场及其周边1.5 km范围内的植被覆盖度呈显著下降趋势,且趋于一致。矿区植被恢复经历了一个"高—低—高"的周期循环,半干旱草原区复垦管护期限尽量保证在6 a以上。70%以上区域在研究时段内植被覆盖度发生转换,转换较为频繁,Ⅰ等植被覆盖度中的90%是由采矿活动转入的。露天煤矿区植被覆盖的提升有赖于矿区社会压力减少和生态恢复力提高两方面。研究成果将为露天煤矿及其所在区域生态环境科学保护与决策、恢复和治理提供信息支撑。 |
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Bibliography: | 11-2047/S Based on Landsat TM satellite remote sensing image data, the paper utilized the vegetation index and vegetation fraction to analyze their spatio-temporal evolution and its driving factors. Spatial heterogeneity and its driving mechanism of vegetation fraction were analyzed under the linkage of mining and reclamation. Based on regression coefficient, standard deviation, gradation conversion matrix, and so on, we revealed the response of the vegetation cover to the mining and reclamation activities with time through the analyses of the trend and fluctuation of vegetation coverage in the study area, the mining area and the reclamation area. The results showed that the vegetation fraction and its grade in different years had some similarity, and the pattern of spatio-temporal evolution was broken by mining and reclamation activities in open pit mines to some extent. The vegetation coverage in the study area was mainly the middle(Grade IV) and the middle-low(Grade III) level, and according to the average |
ISSN: | 1002-6819 |
DOI: | 10.11975/j.issn.1002-6819.2016.17.031 |