YUAN Yuan,LUO Zhijun,ZHAO Jie,et al.Landscape Ecological Security Evaluation of Nanchang City Based on Landscape Structure and Spatial statistics[J].Research of Soil and Water Conservation,2020,27(03):247-255.
基于景观结构和空间统计学的南昌市景观生态安全评价
- Title:
- Landscape Ecological Security Evaluation of Nanchang City Based on Landscape Structure and Spatial statistics
- 文章编号:
- 1005-3409(2020)03-0247-09
- 分类号:
- F301.2
- 文献标志码:
- A
- 摘要:
- 随着城市化进程快速推进,环境污染、资源短缺和土地利用矛盾等一系列城市通病相继出现,城市生态环境问题日益凸显。分析城市化进程下景观类型变化对区域景观生态安全的影响,对解决城市生态问题、协调区域生态安全至关重要。本研究以江西省南昌市为研究区,基于南昌市2000年、2005年、2010年、2015年、2017年遥感影像数据、DEM等数据,在分析了景观类型变化的基础上,通过构建景观生态安全评价模型,运用地统计学、空间自相关等方法对南昌市景观生态安全进行了评价分析。研究表明:南昌市景观类型以耕地、林地、水域为主,且耕地面积减少了80 018.72 hm2,建设用地面积增加78 843.51 hm2。各时期生态安全指数的最优模型均为球状模型,块金基台比在25%左右,存在较强的空间自相关性。景观生态安全水平总体上表现为中部生态安全值较低,四周生态安全值较高的空间格局,集聚现象突出,总体上高值—高值区、低值—低值区的分布与景观生态安全度的分布基本一致。2000—2017年南昌市景观生态安全指数由0.632减少至0.573,中高安全区面积向中度、中低和低安全区转变,总体上景观生态安全水平呈恶化趋势。研究结果对调控南昌市空间格局、优化区域土地资源利用,保障区域可持续发展具有重要意义。
- Abstract:
- With the accelerating urbanization process,a series of urban common diseases have emerged one after another,such as environmental pollution,resource shortage,and land use contradictions,and urban ecological environment problems have become increasingly prominent.It is very important to Analyze the impact of changes of landscape types on regional landscape ecological security in the process of urbanization to solve urban ecological problems and coordinate regional ecological security. This study takes Nanchang City of Jiangxi Province as the research area, and based on remote sensing image data of 2000, 2005, 2010, 2015 and 2017, DEM and other data of Nanchang, we analyzed the landscape pattern in Nanchang first, then constructed the landscape ecological security evaluation model, and used geostatistics, spatial correlation analysis and other methods to evaluate and analyze the landscape ecological security of Nanchang City. The results show that the landscape types of Nanchang are mainly cultivated land, forestland and water area, and the cultivated land area has decreased by 80 018.72 hm2, while the construction land area has increased by 78 843.51 hm2. The results of geostatistical analysis show that the optimal models of landscape ecological security index of Nanchang City from 2000 to 2017 are the spherical model, and the ratio of gold to abutment is about 25%. The landscape ecological security index has strong spatial autocorrelation. The regional landscape ecological security level of Nanchang City had a high positive spatial correlation during the study period, and the high value of landscape ecological safety index was found in the area surrounding Nanchang City, and the low value of landscape ecological safety index was found in the central area of Nanchang City, cluster of the landscape ecological safety index of Nanchang City in each period was significant. And the distributions of high value—high value area and low value—low value area are basically consistent with the distribution of landscape ecological security. The landscape ecological security index of Nanchang City decreased from 0.632 in 2000 to 0.573 in 2017, and the areas of middle and high security zones changed to medium, low and low security zones. Overall, the landscape ecological security level showed the deteriorating trend. The results are of great significance for regulating the spatial pattern of Nanchang City, optimizing the utilization of regional land resources, and ensuring the sustainable development of the region.
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备注/Memo
收稿日期:2019-07-31 修回日期:2019-08-28资助项目:国家自然科学基金(41961042); 教育部人文社会科学研究规划资助项目“基于博弈的城镇用地扩张与生态网络保护空间耦合与优化管控研究”(19YJAZH061); 江西省高校人文社科项目(GL18128); 江西省教育厅科技项目(GJJ180193)第一作者:袁媛(1996—),女,江西新余人,硕士研究生,主要从事土地管理方面研究。E-mail:Yyuan118@163.com通信作者:罗志军(1976—),男,江西新余人,副教授,博士,主要从事土地管理和3S应用方面研究。E-mail:luozj10@163.com