Lu Qi,Xing Shaohua,Liu Chang,et al.Spatiotemporal Variation of the Vegetation Coverage and Its Response to Land Use/Cover Changes in the Yellow River Delta in Recent 20 years[J].Research of Soil and Water Conservation,2023,30(06):366-375.[doi:10.13869/j.cnki.rswc.2023.06.034]
近20年黄河三角洲地区植被覆盖度时空变化及其趋势分析
- Title:
- Spatiotemporal Variation of the Vegetation Coverage and Its Response to Land Use/Cover Changes in the Yellow River Delta in Recent 20 years
- 文章编号:
- 1005-3409(2023)06-0366-10
- Keywords:
- NDVI; fractional vegetation coverage(FVC); land use and land cover change(LUCC); Yellow River Delta; geo-spectrum unit
- 分类号:
- X37; TP79; Q948
- 文献标志码:
- A
- 摘要:
- [目的]探究黄河三角洲地区植被覆盖度的时空动态变化以及植被覆盖度对土地利用变化的响应机制,为地区生态保护、建设与高质量发展提供参考。[方法]基于2000—2019年的归一化植被指数(NDVI)数据和2000—2020年5期土地利用数据,采用slope趋势分析和相关性分析等方法,分析了2000—2019年东营市植被覆盖度的时空动态变化及其对土地利用类型变化的响应。[结果]植被覆盖度在东营市南部地区、黄河沿岸以及黄河故道地区较高,而北部和东部沿海地区较低。在时间上,2000—2019年东营市NDVI为0.25～0.33,植被覆盖度呈现先增加后减少的趋势,在2010年达到最高水平。在空间上,东营市植被覆盖度改善区域面积大于退化区域,其面积占比分别为44.86%,37.94%。[结论]草地和未利用土地向城乡、工矿、居民用地和水域转化是造成植被覆盖退化的主要原因。
- Abstract:
- [Objective] The study aims to investigate the spatial and temporal dynamics of vegetation cover in the region, and the response mechanism of vegetation cover to land use changes, so as to provide reference for the ecological protection, construction and high-quality development of the Yellow River Delta. [Methods] Based on moderate resolution imaging spectroradiometer(MODIS)16-day normalized difference vegetation index(NDVI)at a spatial resolution of 250 m, trend analysis method and correlation analysis method were used to detect vegetation dynamics in Dongying City during 2000—2019. In addition, the geo-spectrum of land use and land cover change(LUCC)was established by using land-use remote sensing data to explore the process and driving forces of LUCC, which was expected to comprehensively understand the relationship between temporal and spatial changes of the fractional vegetation coverage(FVC)and the land-use changes in Dongying City from 2000 to 2019. [Results] By and large, the strong FVC areas mainly distributed in the south of Dongying City, along the Yellow River, and the old course of the Yellow River, while the low FVC areas distributed in the north and east coastland. As for the temporal variation, the annual average NDVI value in Dongying City ranged from 0.25 to 0.33, the FVC of Dongying City appeared to have an overall trend of increasing initially and decreasing afterwards, with the FVC reaching the highest in 2010. As for the spatial variation, the proportion of FVC improvement area was larger than that of degradation area, accounting for 44.86% and 37.94%, respectively. [Conclusion] The conversion of grassland and unused land to construction land and waters is the main reason for the degradation of FVC.
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备注/Memo
收稿日期:2022-06-25 修回日期:2022-10-10
资助项目:国家自然科学基金(42107510); 国家重点研发计划项目(2017YFC0505802-3); 黄河流域生态保护和高质量发展联合研究一期项目(2022-YRUC-01-0103)
第一作者:路琦(1998—),女,山东日照人,硕士研究生,研究方向为自然保护区规划与生物多样性保护。E-mail:luqi_1998@163.com
通信作者:袁秀(1981—),女,重庆渝北区人,博士,副研究员,主要从事资源环境可持续发展研究。E-mail:yuanxiu@casisd.cn