基于多源遥感数据的黄土高原矿区植被变化研究——以轩岗矿区为例

Vegetation dynamics analyses in mining area of Loess Plateau based on multi-source remote sensing data——Taking Xuangang ming area as an example

以黄土高原轩岗矿区为例,基于Landsat TM/OLI遥感数据与MOD17A3H净初级生产力产品,分析了2000—2015年轩岗矿区植被数量与植被质量变化.结果表明,研究期间内轩岗矿区植被区域面积减少了7 090.3hm^2,耕地净减少3 959.9hm^2,林地净减少1 646.8hm^2,草地净减少1 538.8hm^2,灌木净增加55.1hm^2,工矿用地面积增加7 050.4hm^2;轩岗矿区植被生产力呈减小趋势,2006年之前植被生产力急剧减小,2006年之后植被生产力不显著缓慢增加.

Xuangang mining area is selected as study object in the study.The vegetation quantity and quality dynamics in Xuangang mining area from 2000 to 2015 are conducted with Landsat TM/OLI data and MOD17A3H P NP(Net primary productivity).About 7 090.3 hm 2 in vegetation area has been lost in the mining area from 2000 to 2015.Among different vegetation types,3 959.9 hm 2 in cultivated land has been lost,1 646.8 hm 2 in forest land has been lost,1 538.8 hm 2 in grasslands has been lost,and 55.1 hm 2 in shrub land has been gained in the mining area from 2000 to 2015.At the same time,about 7 050.4 hm 2 in industrial land has been gained,coal mining is the important factor of vegetation quantity loss in the mining area.The P NP decreased in the mining area from 2000 to 2015.Further analyses show,however,the P NP sharply decreased before 2006,and slowly increased after 2006 in the mining area.