克东县2000—2020年植被覆盖变化分析

Analysis of Vegetation Coverage Change in Kedong County in 2000-2020

植被覆盖度既是量化植物群落覆盖地表状况的指标参数,也是开展遥感物理模型定量研究的基本参数,植被覆盖度的变化状况反映了地区生态环境变化情况。本研究将克东县作为研究区域,基于2000—2020年GlobeLand30及Landsat遥感数据集,利用遥感影像解译、叠加分析等方法,对植被覆盖度的演化趋势进行研究。结果表明:(1)研究区以耕地为主要土地利用类型,类型从耕地>草地>林地>水域>建设用地>其他土地>特殊用地向着耕地>草地>林地>建设用地>特殊用地>水域>其他土地进行发展;(2)植被覆盖类型从以较低覆盖度为主导向着较高覆盖度推进,整体上呈现从低到高的发展趋势;(3)各土地利用类型中,耕地、草地、水域、建设用地、其他土地的植被覆盖度呈增长态势,林地保持不变,特殊用地呈下降趋势。总体上,克东县2000—2020年植被生长状况良好,植被覆盖类型从低覆盖度向着高覆盖度发展,在保持稳定的基础上,呈发展态势。

Vegetation coverage is not only an index parameter for quantifying the surface coverage of plant communities,but also a basic parameter for quantitative research of remote sensing physical model.The change of vegetation coverage reflects the change of regional ecological environment.Taking Kedong County as the research area,and based on the remote sensing data sets of GlobeLand30 and Landsat from 2000 to 2020,the evolution trend of vegetation coverage was studied by means of remote sensing image interpretation and superposition analysis.The conclusions are as follows:(1) cultivated land was the main type of land use in the study area,and the land use type developed from cultivated land grassland woodland water area construction land other land special land to cultivated land grassland woodland construction land special land water area other land;(2) vegetation coverage types were advancing from low coverage to high coverage,showing a development trend from low to high as a whole;(3) among the land use types,the vegetation coverage of cultivated land,grassland,water area,construction land and other land showed an increasing trend,while the woodland remained unchanged,while the special land showed a decreasing trend.On the whole,the vegetation in Kedong County grew well from 2000 to 2020,and the vegetation coverage types developed from low coverage to high coverage,which showed a development trend on the basis of maintaining stability.