| 基于遥感生态指数的粤港澳生态环境质量与土地利用变化空间关系 |
| 摘要点击 1976 全文点击 355 投稿时间：2023-10-27 修订日期：2024-02-06 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 生态环境质量 土地利用变化 谷歌地球引擎（GEE云平台） 遥感生态指数（RSEI） 空间关系 |
| 英文关键词 eco-environment quality land use change Google earth engine（GEE） remote sensing-based ecological index（RSEI） spatial relationships |
| DOI 10.13227/j.hjkx.20241123 |
|
| 中文摘要 |
| 生态环境质量与土地利用变化的协调关系,是区域可持续发展的重要保障. 广东、香港和澳门（“粤港澳”）历来紧密联系,现正进入加速发展时期,缺乏粤港澳整合的生态环境质量与土地利用变化空间关系研究. 基于土地利用历史数据和谷歌地球引擎（GEE云平台）,选取2000~2020年夏季（6月1日至9月1日）MODIS影像（时间跨度为5 a）,计算遥感生态指数（RSEI）以表征生态环境质量状况,挖掘生态环境质量与土地利用变化的空间关系. 结果表明：①粤港澳土地利用类型以林地为主,林地是北部生态发展区（生态区）和粤港澳大湾区（大湾区）西北部景观的基底,土地利用程度呈现“中间高,四周低”、“南高北低”和“西南、东北有高值”的空间格局,土地利用变化强度在生态区最小. ②按RSEI由小到大排序,生态环境质量由低至高的区域依次为大湾区、沿海经济带东翼（东翼）、沿海经济带西翼（西翼）和生态区. ③生态环境质量与土地利用程度呈强负相关关系,高-低（H-L）聚类分布范围较为稳定,主要集中在大湾区中心,低-高（L-H）聚类分布相对不稳定,以分布于生态区为主,东翼和西翼县域、香港和澳门均为无显著相关特征. ④粤港澳中心的生态环境质量低值斑块扩张与人工表面扩张表现出一致性,广州佛山的中心、汕头的东部以及湛江雷州的西南部多以耦合为主,生态区、东翼中部、西翼东部和大湾区西北部以非耦合为主. 土地利用变化是生态环境质量改变的重要因子,需要全域重点规划与布局土地利用结构,从整体上提升生态环境质量. |
| 英文摘要 |
| The relationship between eco-environment quality and land use change is an important guarantee for regional sustainable development. Guangdong Province-Hong Kong-Macao have always been closely linked and are now entering a period of accelerated development, but there is a lack of research on the spatial relationship between eco-environment quality and land use change integrated among the three places. Based on historical land use data and Google earth engine （GEE）, MODIS images from the summer of 2000 to 2020 （from June 1 to September 1） were selected （with a time span of five years）. The remote sensing-based ecological index （RSEI） was calculated to characterize the status of eco-environment quality and explore the spatial relationship between eco-environment quality and land use change. The results showed that： ① The land use type in the study area was mainly forest land, which was the base of the northern ecological development area （ecological area） and the northwestern landscape of the Guangdong-Hong Kong-Macao Greater Bay Area （the Greater Bay Area）. The land use degree presented a spatial pattern of “high in the middle, low in the periphery,” “high in the south and low in the north,” and “high in the southwest and northeast.” The intensity of land use change was the least in the ecological area. ② According to RSEI, the regions with an eco-environment quality from low to high were the Greater Bay Area, the eastern wing of the coastal economic belt （east wing）, the western wing of the coastal economic belt （west wing）, and the ecological area. ③ There was a strong negative correlation between eco-environment quality and land use degree. The distribution range of high to low （H-L） cluster was relatively stable, mainly concentrated in the center of the Greater Bay Area, while the distribution of low to high （L-H） cluster was relatively unstable, mainly distributed in the ecological region, and there was no significant correlation between the eastern and western counties, Hong Kong and Macao. ④ The low-value patches of ecological environment quality in Guangdong-Hong Kong-Macao centers were consistent with artificial surface expansion. The center of Foshan in Guangzhou, the eastern part of Shantou, and the southwestern part of Zhanjiang were mainly coupled, while the ecological area, the central part of the east wing, the eastern part of the west wing, and the northwestern part of the Greater Bay Area were mainly uncoupled. Land use change and eco-environment quality were closely related in space. The eco-environment quality of the study area mainly presented a spatial pattern of “high in the middle and low in the north” and “a certain low value in the east.” The Greater Bay Area had the lowest eco-environment quality, followed by that of the eastern wing. In the past 20 years, the expansion of low-value eco-environment quality in the center of the Greater Bay Area had formed a continuous landscape base of low-value eco-environment quality. The ecological area had most of the high value areas of eco-environment quality, which provided a large area of ecological environment of good patches for the study area. From 2000 to 2020, there was a significant negative correlation between land use degree and eco-environment quality in the study area, with regional heterogeneity. Land use change is an important factor in the change in eco-environment quality, so it is necessary to focus on the whole planning and layout of land use structure to improve the eco-environment quality. |
|
|
|
