摘要
基于1998—2012年长时序SPOT VEGETATION归一化植被指数数据,采用一元线性回归分析法和Mann-Kendall非参数检验法对广西植被变化趋势作了时空分析。结果表明:1998—2012年,广西年最大化NDVI均值总体呈上升趋势,植被覆盖状况以良好区域占主导地位,其中较高植被覆盖区域占广西区总面积的73.08%,而低植被覆盖区域仅占1.18%。年最大化NDVI变化趋势以改善为主,局部地区恶化,其中97.86%的地区植被得到改善,严重退化区域约占0.57%。Mann-Kendall趋势分析结果表明,广西植被覆盖总体呈增加趋势,与一元线性回归法分析结果一致。
Vegetation coverage changing in Guangxi from 1998 to 2012 is studied based on the SPOT vegetation data.Methods of linear regression and Mann-Kendall non-parametric test are used to reveal spatial and temporal changes in vegetation.Results show that the average maximum NDVI is on the rise,dominant vegetation coverage is good.The higher vegetation areas account for 73.08 percent of the total area,while low vegetation coverage only 1.18 percent.Annual maximum NDVI dominating changing trend is good.Improved areas account for 97.86 per-cent while serious degraded areas account for 0.57 percent.Mann-Kendall trend analysis result shows that the vegetation coverage is on the rise in Guangxi province,which is consistent with the result of slope method.
出处
《桂林理工大学学报》
CAS
北大核心
2015年第2期335-339,共5页
Journal of Guilin University of Technology
基金
国家自然科学基金项目(41261088)
广西自然科学基金项目(2012GXNSFGA060001)
广西"八桂学者"岗位专项经费项目
广西空间信息与测绘重点实验室基金项目(桂科能1207115-04
1305114-11)
