赖双双 庞柯柯 姚文昕

摘要 [目的]研究2001—2017年廣西3种典型土地覆被（森林、农田和城市）的时空变化特征。[方法]基于广西统计年鉴和MODIS遥感观测资料，以经济区为研究单元对土地覆被的时空变化进行比较分析。[结果]广西森林覆被率整体提高，各经济区森林覆被的持续稳定比率差异明显，东部地区（包括桂北、桂中、桂东）持续稳定比率高且呈连片分布，增速较慢，属森林稳定发展区;西部地区（包括桂西、桂南）持续稳定比率低，但新增森林覆被较多且增速较快，属森林快速发展区;农田覆被整体变化不大，桂南、桂中、桂东地区农田覆被率高、持续稳定比率高，且连片分布，与桂西、桂北的低覆被率、低持续稳定比率形成明显差异;各经济区城市覆被均增加，从北至南以桂林、柳州、南宁三大主要城市为核心向四周扩张，前期（2001—2010年）、后期（2011—2017年）均有不同程度的增长，桂—柳—南沿线以东城市扩张发展较沿线以西好，与经济区实际的经济发展相符合。[结论]该研究为土地可持续发展提供参考。

关键词 土地覆被;森林;农田;城市;变化特征;MODIS;广西

中图分类号 P237  文献标识码 A  文章编号 0517-6611（2021）13-0051-04

doi：10.3969/j.issn.0517-6611.2021.13.014

开放科学（资源服务）标识码（OSID）：

Analysis on Characteristics of Typical Land Cover Change over Guangxi Based on MODIS

LAI Shuang shuang1，2， PANG Ke ke1，YAO Wen xin1

（1.School of Natural Resources and Surveying， Nanning Normal University， Nanning， Guangxi 530001;2.Center of Health Geography and Education Information，Nanning Normal University， Nanning， Guangxi 530001）

Abstract [Objective] To study the temporal and spatial characteristics of three typical land covers （forest， farmland and city） in Guangxi from 2001 to 2017.[Method] Based on the Guangxi Statistical Yearbook and MODIS remote sensing observation data， the economic zone is used as the research unit to compare and analyze the temporal and spatial changes of land cover.[Result]The forest cover rate of Guangxi improved as a whole， and there were obvious differences in the continuous steady ratio of forest cover among the economic regions. The eastern region （including northern， central and eastern Guangxi） had a high continuous steady ratio and contiguous distribution， but the growth rate was slow， this area was a forest stable development zone. The western region （including western and southern Guangxi） had a low continuous steady ratio， but the newly increased forest cover was more and the growth rate was fast， this area was a forest fast development zone.The overall change of farmland cover was not significant. In southern， central and eastern Guangxi， the farmland cover rate and continuous steady ratio were high， and the farmland cover distribution was contiguous， which was contributed to the significant differences from the western and northern parts of Guangxi.The urban cover of economic zones increased， and expanded to surrounding areas from north to south of Guangxi， with Guilin， Liuzhou and Nanning as the core cities， the urban cover of economic zones had different degrees of increase in the early （2001-2010） and late （2011-2017） stages. The expansion and development of the cities in the east of the line of Guilin Liuzhou Nanning was better than that in the west of the line， which was consistent with the actual economic development of the economic zones.[Conclusion]The study provides the reference for sustainable development of land.

Key words Land cover;Forest;Farmland;City;Change characteristics;MODIS;Guangxi

土地覆被变化是全球变化和可持续发展的重要研究内容[1-2]。20世纪后期以来，中国社会经济的持续快速发展，工业化、城市化进程的不断加快，以及国家区域发展与生态保护战略的实施，对中国土地覆被空间格局变化产生了显著的影响[3-4]，各区域由于自然环境、技术、经济发展等因素的不同，其土地覆被变化存在明显的空间差异[5-7]。……