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徐州市区的土地利用变化及其生态环境效应
王家慧, 梁亮, 黄婷, 罗翔, 林卉
江苏师范大学 地理测绘与城乡规划学院, 江苏 徐州 221116
摘要:
[目的] 研究徐州市区的土地利用变化及其生态环境效应,为土地的合理规划以及区域经济与生态环境的平衡提供理论支持和参考依据。[方法] 以土地利用转移矩阵和叠加分析为工具,分析徐州市中心城区的土地利用类型的动态变化特征和空间格局演变规律,并通过NDVI和区域生态环境质量指数分析土地利用变化的生态环境效应。[结果] 基于多源遥感数据的分类回归树(CART)分类结果,其Kappa系数均大于0.90;整个研究区耕地面积大幅减少,建筑用地迅速增加。郊区较多土地类型转变为建筑用地,在2004—2016年期间,研究区NDVI低值区域逐步扩大,但生态环境质量先由0.323增加为0.360,后下降至0.320。[结论] 2004—2016年徐州城市扩张导致耕地大面积较少,景观破碎化加剧,但城市建设过程中绿地面积增加,整体生态环境质量稍有提升。建议进一步加强徐州城区景观格局的合理规划,降低城市化进程给生态环境带来的负面影响。
关键词:  土地利用变化  生态环境效应  区域生态环境质量  徐州市区
DOI:10.13961/j.cnki.stbctb.2018.06.017
分类号:
基金项目:江苏省自然科学基金项目“多源遥感数据支持下的城市植被碳汇估算方法研究”(BK20181474);遥感科学国家重点实验室开放基金(OFSLRSS201804);江苏省研究生科研创新计划项目(KYCX17_1572;KYCX18_2157);江苏高校优势学科建设项目(PAPD)
Land Use Change and Ecological Effects in Downtown Xuzhou City
WANG Jiahui, LIANG Liang, HUANG Ting, LUO Xiang, LIN Hui
School of Geography Geomatics and Planning, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
Abstract:
[Objective] The land use change and ecological environment effect in Xuzhou City were studied in order to provide theoretical support and reference basis for rational land planning and balance of regional economy and ecological environment.[Methods] The dynamic changes of land use types and spatial pattern evolution of land use in downtown Xuzhou City were investigated based on the analysis of land use transfer matrix and overlay. The ecological environmental effects of land-use changes were analyzed using NDVI and regional ecological environmental quality index.[Results] The Kappa coefficient of multi-source remote sensing data was higher than 0.90 based on results of classification and regression tree (CART). The area of cultivated land was greatly reduced, and construction land was increasing rapidly. Much suburb area has been converted into building land. During the period of 2004-2016, the low value zone of NDVI in Xuzhou City gradually expanded, but the ecological environment quality increased from 0.323 to 0.360, and then decreased to 0.320.[Conclusion] From 2004 to 2016, the urban expansion of Xuzhou City resulted in less farmland and intensified landscape fragmentation, but the acreage of greenbelt increased during the urban construction process and the overall ecological environment quality improved slightly. It is suggested to further strengthen the reasonable planning of urban landscape pattern and reduce the negative impact of urbanization on the ecological environment.
Key words:  LUCC  ecological environmental effect  regional ecological environment quality  Downtown Xuzhou City