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| 长三角快速城市化地区景观多功能性演变——以苏州市为例 | |
| 引用本文： | 梁鑫源,金晓斌,韩博,孙瑞,张晓琳,周寅康.长三角快速城市化地区景观多功能性演变——以苏州市为例[J].地理科学进展,2021,40(2):207-219. |
| 作者姓名： | 梁鑫源 金晓斌 韩博 孙瑞 张晓琳 周寅康 |
| 作者单位： | 1. 南京大学地理与海洋科学学院,南京 210023 2. 自然资源部海岸带开发与保护重点实验室,南京 210023 3. 江苏省土地开发整理技术工程中心,南京 210023 |
| 基金项目： | 国家自然科学基金项目(41971234);国家自然科学基金项目(41971235);国家社会科学基金重大项目(19ZDA096) |
| 摘 要： | 评估快速城市化地区的景观多功能性演变特征对于理解城乡发展转型下的资源配置与优化、制定合理的区域土地管理与规划政策至关重要。论文以长三角经济区中城市化进程最为突出的代表性城市——苏州市为研究区,选取居住承载、粮食供给、生境维持、水源涵养、气候调节与土壤保持6种景观功能指标,通过空间分析、SOFM网络模型等方法,基于1 km景观单元对区域景观多功能性的热点演变规律、权衡协同演化关系等进行分析。研究表明：① 受城市扩张影响,2000—2015年间苏州市景观多功能以居住承载功能的扩散态势为主,其他景观功能均呈现差异化缩减趋势,其中粮食供给与生境维持的功能弱化最为显著,且3种调节功能的空间分布特征存在一致性。② 随时间推移,苏州市景观多功能性逐渐增强,其高值区(>2)范围集中分布在林草地与耕地景观。在社会经济发展影响下,区域景观多功能性时空演变特征由强到弱并逐渐趋于稳定,演变热点区主要分布在乡村地区与城乡结合部,冷点区则以生态空间集聚为主。③ 景观多功能之间权衡与协同关系在研究期内的特征规律并未因时间序列演进表现出差异性,但权衡与协同程度存在波动性变化趋势。结合多功能权衡特征与多功能性热点变化规律,可在景观单元与乡镇行政单元上将苏州市划分出8类主导景观功能与4类城乡发展分区。整体而言,长三角快速城市化地区的景观多功能性优势呈“城市→近郊区→远郊区→乡村”的圈层式空间迁移过程,但多功能性映射出的土地利用多样化势必会导致更多的土地利用冲突问题,决策者应在多尺度时空耦合视角综合考虑景观管理或土地利用政策的设计与实施。 |
| 关 键 词： | 长三角 城市化 景观多功能性 演变特征 多尺度耦合 |
| 收稿时间： | 2020-04-27 |
| 修稿时间： | 2020-06-01 |
Landscape multifunctionality change in rapidly urbanized areas of the Yangtze River Delta:A case study of Suzhou City |
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| LIANG Xinyuan,JIN Xiaobin,HAN Bo,SUN Rui,ZHANG Xiaolin,ZHOU Yinkang.Landscape multifunctionality change in rapidly urbanized areas of the Yangtze River Delta:A case study of Suzhou City[J].Progress in Geography,2021,40(2):207-219. | |
| Authors: | LIANG Xinyuan JIN Xiaobin HAN Bo SUN Rui ZHANG Xiaolin ZHOU Yinkang |
| Institution: | 1. School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China 2. Key Laboratory of Coastal Zone Exploitation and Protection, Ministry of Natural Resources, Nanjing 210023, China 3. Jiangsu Land Development and Consolidation Technology Engineering Center, Nanjing 210023, China |
| Abstract: | Assessing the characteristics of landscape multifunctionality change in rapidly urbanized areas is critical for understanding resource allocation and optimization under the background of rural-urban development and transformation and for formulating reasonable regional land management and planning policies. This study took Suzhou City, the most prominent representative city in the urbanization process in the Yangtze River Delta Economic Zone, as the research area. Six landscape multifunctionality indicators are selected, including residential support, food supply, habitat maintenance, water conservation, climate regulation, and soil retention. Based on the 1 km landscape units, change in hotspots of regional landscape multifunctionality and trade-off co-evolution relationships were analyzed through spatial analysis, self-organizing feature maps (SOFM) network model, and other methods. The research shows that: 1) Affected by urban expansion, landscape multifunctions in Suzhou during 2000-2015 were dominated by the spread of residential support functions. Other landscape functions represented a differentiated shrinking trend, of which the function of food supply and habitat maintenance was weakened most significantly, and the spatial distribution characteristics of the three regulatory functions were consistent. 2) Landscape multifunctionality in Suzhou has gradually increased over time, and its high-value (>2) areas are concentrated in forest, grassland, and farmland areas. The spatiotemporal change of regional landscape multifunctionality varied from strong to weak and gradually stabilized under the influence of socioeconomic development, the hotspots of change were mainly distributed in rural areas and rural-urban junctions, and the cold spots are mainly based on ecological spatial agglomerations. 3) Trade-off relationships between landscape multifunctions during the study period did not change over time, but there is a volatile change in trade-off degrees. Combining the features of multifunctional trade-offs and the changing pattern of multifunctionality hotspots, Suzhou City can be divided into eight types of dominant landscape functions and four types of rural-urban development zones in landscape units and township administrative units. Overall, the advantages of landscape multifunctionality in rapidly urbanized areas of the Yangtze River Delta present a circular spatial migration process of "city → near suburbs → far suburbs → rural areas". However, land use diversifications mapped out by the multifunctionality will inevitably lead to more land use conflicts. Policymakers should consider the design and implementation of landscape management or land use policies from a multi-scale spatiotemporal coupling perspective. |
| Keywords: | Yangtze River Delta urbanization landscape multifunctionality characteristics of change multiscale coupling |
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