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요약정보
2011—2020年宁夏植被覆盖时空变化分析 / Spatiotemporal Changes of Vegetation Coverage in Ningxia from 2011 to 2020
Resource Type
Academic Journal
Authors
李存厚
;
冯克鹏
;
LI Cunhou
;
FENG Kepeng
Source
西北水电 / Northwest Water Power
. (3):27-33
Subject
宁夏
NDVI
GEE
植被覆盖
Language
Chinese
ISSN
1006-2610
Online Access
Find it @ DONGA
초록
植被是全球变化的敏感"指示器",对其生长和覆盖状况进行动态监测具有重要的生态意义.文章基于Google earth engine(GEE)平台和2069景Landsat5,7,8地表反射率数据,采用最大值合成法、回归分析法等分析了2011—2020年宁夏植被覆盖的时空变化,通过 R/S计算 Hurst指数对其可持续变化趋势进行分析.结果表明:2011—2020年宁夏植被NDVI以0. 0106/a的速率呈现出明显增长趋势;宁夏植被低覆盖区和中低覆盖区总体在减少,高覆盖区明显增多,区域植被覆盖呈改善趋势;宁夏有71. 17%的区域植被覆盖较为稳定,保持基本不变, 20. 49%的区域植被覆盖改善具有可持续性,7. 07%的区域植被覆盖持续性不够.建议在引黄灌区与中部干旱带的交汇过渡地带应该实施必要的生态建设工程,同时提高各地市建成区的绿化水平.
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