基于遥感资料的莲花山矿区生态修复效果评估

Assessment of Ecological Restoration Effect in Lianhua Mountain Mining Area Based on Remote Sensing Data

植被覆盖度和植被净第一生产力是评价矿区开采后生态修复效果的重要指标。使用高分一号2014—2023年的遥感影像,以汕头市澄海区莲花山钨矿矿区为研究对象,对矿区内的植被覆盖度进行长时间序列分析,并通过使用气温、降水、太阳辐射通量等气象因子计算矿区内的植被净第一生产力。结果表明,2014—2023年,矿区内的FVC呈现波动上升态势,除了2015年、2018年和2021年有所下降以外,平均FVC由2014年的0.26上升到2023年的0.34。矿区内的NPP由2017年的385.01 gC/(m^(2)·a)增加到2023年的557.73 gC/(m^(2)·a)。NPP除了和植被覆盖度FVC相关,还和气温、降水、太阳入射辐射量等气象因子有关。综合来看,自2014年以来,矿区植被恢复取得了良好的效果。

Vegetation coverage and net primary productivity of vegetation are important indicators to evaluate the ecological restoration effect of mining area.Using the remote sensing images of GF-1 from 2014 to 2023,taking Lianhua Mountain Tungsten mine in Chenghai District,Shantou City as the research object,the fractional vegetation cover(FVC)in the mine area was analyzed in a long time series.The net primary productivity(NPP)of vegetation in Lianhua Mountain mining area was calculated by using meteorological factors such as temperature,precipitation and solar radiation flux.The results showed that from 2014 to 2023,the FVC in the mining area presented a fluctuating upward trend,and the average FVC increased from 0.26 in 2014 to 0.34 in 2023,except for a decrease in 2015,2018 and 2021.The NPP in the mine increased from 385.01 gC/(m^(2)·a)in 2017 to 557.73 g/(m^(2)·a)in 2023.NPP was not only related to FVC,but also to meteorological factors such as temperature,precipitation and solar incident radiation.Overall,since 2014,the vegetation restoration in Lianhua Mountain mining area of Chenghai District had achieved good results.