摘要
为探究山区矿区内植被覆盖变化情况,以大宁矿区为例,基于1998—2017年Landsat影像,通过选取7个时期的数据代入像元二分法模型中,反演出矿区不同时期的地表植被覆盖度(Fractional Vegetation Cover,FVC),同时利用Sen+Mann-Kendall趋势分析方法计算了矿区植被覆盖度变化趋势。通过研究大宁矿区不同时期植被覆盖度的时空变化特征及变化趋势,结合井下工作面开采活动,定量分析了研究区19 a植被覆盖度的时序变化特征,并根据研究区情况提出了合理建议。研究表明:①1998—2017年,研究区整体植被覆盖面积增加了4.7241 km^(2),变化趋势为平缓向好的发展趋势,矿区植被覆盖面积占比达到87.52%,主要得益于相关环境保护与生态建设政策的实施以及矿区所处环境的影响;②通过分析2005—2010年间地表植被对开采活动的响应,发现工作面开采后植被覆盖面积均小于开采前,说明开采活动会导致矿区植被减少,使矿区生态环境遭到破坏;③通过对矿区整体与矿区工作面的地表植被覆盖度反演发现,研究区植被覆盖度与矿区开采活动在时间和空间上具有一致性。
In order to explore the change of vegetation cover in mountainous mining area,taking Daning mining area as an example,based on the 1998—2017 Landsat images,the fractional vegetation cover(FVC)in different periods of mining area was inversed by selecting the data of seven periods and substituting them into the pixel dichotomy model,At the same time,the change trend of vegetation coverage in the mining area is calculated by using Sen+Mann-Kendall trend analysis method.By studying the temporal and spatial variation characteristics and variation trend of vegetation coverage in different periods in Daning mining area,combined with underground mining activities,the temporal and spatial variation characteristics of vegetation coverage in 19 years in the study area were quantitatively analyzed,and reasonable suggestions were put forward according to the situation of the study area.The results show that:①From 1998 to 2017,the overall vegetation coverage area of the study area increased by 4.7241 km2,and the change trend is from gentle to good.The vegetation coverage area of the mining area accounts for 87.52%,which is mainly due to the implementation of relevant environmental protection and ecological construction policies and the impact of the environment of the mining area;②Through the analysis of the response of surface vegetation to mining activities from 2005 to 2010,it is found that the vegetation coverage area after mining is smaller than that before mining,which indicates that mining activities will lead to the reduction of vegetation in the mining area and the destruction of ecological environment in the mining area;③Through the inversion of the vegetation coverage of the whole mining area and the working face of the mining area,it is found that the vegetation coverage of the study area is consistent with the mining activities in time and space.
作者
钟琪
胡晋山
康建荣
ZHONG Qi;HU Jinshan;KANG Jianrong(School of Geography,Geomatics and Planning,Jiangsu Normal University,Xuzhou 221116,China)
出处
《金属矿山》
CAS
北大核心
2021年第11期197-203,共7页
Metal Mine
基金
国家自然科学基金项目(编号:41671395,52074133)
江苏省研究生科研创新计划项目(编号:KYCX20_2366)。
