延吉市城市生态用地空间结构评价
发布时间：2018-08-08 20:50
【摘要】：城市是以人类活动为主导的社会-经济-自然复合生态系统。本文利用ArcGIS和Fragstats对延吉市城市生态用地的定量分析和空间结构现状的评价,为延吉市的城市规划与可持续发展提供依据。本文结合资料整理以及延吉市实际情况,将延吉市城市用地的类型划分为7个一类用地,11个二类用地。主要划分为耕地、林地、园地、绿地(公园绿地、广场绿地、防护绿地和庭院绿地)、水域(人工湿地和天然湿地)、其他生态用地和非生态用地。延吉市生态用地空间结构定量分析,利用ArcGIS对1990年、2005年和2013年延吉市影像图解译,生成延吉市城市生态用地土地类型矢量图,栅格化之后利用Fragstats4.2来计算核心的景观指数,对每一年的景观指数进行分析,最后得出延吉市生态用地空间结构的动态变化。从2005年到2013年,研究区内,斑块面积优势最大的是耕地,其次林地和非生态用地；生态用地中,除了绿地和园地面积有所增加,其余4类均不同程度的减少；生态用地被非生态用地侵蚀约295公顷；景观指数方面,生态用地斑块的分维数和平均形状指数都提升,说明生态用地被非生态用地分割的越来越破碎,但是多样性也相对增加,说明对延吉生态用地的保护工作有很大的潜力；延吉市在空间方向上,生态用地主要是沿着河流被侵蚀,其中公园往西和科技学院西北和东南这几个方向被侵蚀的最严重。延吉市城市生态用地空间结构评价,本文应用了3个准则层,15个指标层构建延吉市城市生态用地空间结构评价指标体系,所选取的指标从获取难易度,对生态用地影像程度等方面考虑。利用AHP层次分析法建立判断矩阵和一致性检验,确定体系中各指标的权重值。然后对指标的实际值进行无量纲化,最后得出综合评价值。结果显示05年和13年延吉市城市生态用地空间结构评价值分别为0.5575、0.5050,均处于Ⅲ级,13年较05年下降,说明延吉市城市生态用地空间结构较不合理,生态效益一般。在对延吉市未来的规划过程中,应该加强对森林,水体和水域周边环境的保护和优化。
[Abstract]:City is a social-economic-natural complex ecosystem dominated by human activities. This paper makes use of ArcGIS and Fragstats to quantitatively analyze the urban ecological land and evaluate the present situation of spatial structure in Yanji city, which provides the basis for the urban planning and sustainable development of Yanji city. According to the data and the actual situation of Yanji City, this paper divides the urban land use of Yanji into 7 first class land and 11 second class land use. It is mainly divided into cultivated land, woodland, garden land, green space (park green space, square green space, protected green space and courtyard green space), water area (artificial wetland and natural wetland), other ecological land and non-ecological land. Based on the quantitative analysis of the spatial structure of ecological land in Yanji city, this paper uses ArcGIS to interpret the image of Yanji city in 1990, 2005 and 2013, and generates the vector map of the urban ecological land type in Yanji city. After rasterization, the core landscape index is calculated by using Fragstats4.2. Finally, the dynamic change of spatial structure of ecological land in Yanji is obtained by analyzing the landscape index of each year. From 2005 to 2013, the dominant patch area was cultivated land, followed by woodland and non-ecological land. Ecological land was eroded by non-ecological land about 295 hectares, landscape index, the fractal dimension and average shape index of ecological land patch were increased, which indicated that ecological land was more and more fragmented by non-ecological land, but the diversity of ecological land was also relatively increased. It shows that there is great potential to protect the ecological land in Yanji, and the ecological land is mainly eroded along the river in the space direction of Yanji city, among which the park is most seriously eroded to the northwest and southeast of the Institute of Science and Technology. In this paper, the evaluation index system of the spatial structure of urban ecological land in Yanji city is constructed by using three criterion layers and 15 index layers, and the selected indexes are obtained from the degree of difficulty. To the ecological land image degree and so on consideration. The judgment matrix and consistency test are established by AHP analytic hierarchy process (AHP), and the weights of each index in the system are determined. Then the actual value of the index is dimensionless and the comprehensive evaluation value is obtained. The results showed that the evaluation value of urban ecological land spatial structure in Yanji in 2005 and 13 years was 0.5575 (0.5050), which was in grade 鈪，
本文编号：2172999
[Abstract]:City is a social-economic-natural complex ecosystem dominated by human activities. This paper makes use of ArcGIS and Fragstats to quantitatively analyze the urban ecological land and evaluate the present situation of spatial structure in Yanji city, which provides the basis for the urban planning and sustainable development of Yanji city. According to the data and the actual situation of Yanji City, this paper divides the urban land use of Yanji into 7 first class land and 11 second class land use. It is mainly divided into cultivated land, woodland, garden land, green space (park green space, square green space, protected green space and courtyard green space), water area (artificial wetland and natural wetland), other ecological land and non-ecological land. Based on the quantitative analysis of the spatial structure of ecological land in Yanji city, this paper uses ArcGIS to interpret the image of Yanji city in 1990, 2005 and 2013, and generates the vector map of the urban ecological land type in Yanji city. After rasterization, the core landscape index is calculated by using Fragstats4.2. Finally, the dynamic change of spatial structure of ecological land in Yanji is obtained by analyzing the landscape index of each year. From 2005 to 2013, the dominant patch area was cultivated land, followed by woodland and non-ecological land. Ecological land was eroded by non-ecological land about 295 hectares, landscape index, the fractal dimension and average shape index of ecological land patch were increased, which indicated that ecological land was more and more fragmented by non-ecological land, but the diversity of ecological land was also relatively increased. It shows that there is great potential to protect the ecological land in Yanji, and the ecological land is mainly eroded along the river in the space direction of Yanji city, among which the park is most seriously eroded to the northwest and southeast of the Institute of Science and Technology. In this paper, the evaluation index system of the spatial structure of urban ecological land in Yanji city is constructed by using three criterion layers and 15 index layers, and the selected indexes are obtained from the degree of difficulty. To the ecological land image degree and so on consideration. The judgment matrix and consistency test are established by AHP analytic hierarchy process (AHP), and the weights of each index in the system are determined. Then the actual value of the index is dimensionless and the comprehensive evaluation value is obtained. The results showed that the evaluation value of urban ecological land spatial structure in Yanji in 2005 and 13 years was 0.5575 (0.5050), which was in grade 鈪，
本文编号：2172999
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