长沙市城乡结合部土地利用变化及景观格局响应研究

发布时间：2018-05-28 15:43

本文选题：城乡结合部 + 土地利用　；参考：《湖南师范大学》2015年硕士论文

【摘要】：长沙市正处在城镇化快速发展的阶段,随着城乡一体化的深入推进,长沙市城乡结合部以中心城区为圆心不断向外辐射扩张。城乡结合部地区的土地利用与保护的矛盾不断加剧,区域景观格局变化显著。基于1991年、2004年和2013年三期卫星遥感影像和相关数据,依据景观生态学理论,通过构建二阶段数据包络模型对23年长沙市城乡结合部的土地利用变化与景观格局响应特征进行分析,辨别土地利用与景观格局之间不同的响应等级,并采用结构方程模型对土地利用结构、景观格局及其生态服务功能进行验证性的分析,以期为土地利用结构调整决策提供参考依据。主要结论如下:(1)研究区范围极大扩张,土地利用类型转化频繁。1991年-2004年城乡结合部扩大,土地综合利用程度大幅度提高,2004年城乡结合部进一步扩大,但是土地综合利用程度衰退。(2)土地利用景观异质性明显,复杂性加剧。长沙市城乡结合部在研究期内表现出小型斑块被整合,而土地利用优势类型的大型斑块则呈现积极向外扩展的发展态势。景观多样性提高,不同景观类型比例差异有所减小,景观的异质性和复杂性程度加大,各类土地景观趋于破碎化。(3)土地利用、景观格局和生态响应空间变异突出,阶段性特性显现。结构方程模型验证了土地利用与景观及生态功能之间存在相关关系。二阶段数据包络模型定量地显示了土地利用景观格局响应系数空间变化规律与土地利用生态服务响应规律具有较大的差异性,也与土地利用总的格局响应存在区别。(4)土地利用生态响应注重数量配置和格局优化。数据包络模型的松弛变量求解方法,为土地利用调控措施提供了量化路径:第一、通过调整土地利用结构,利用土地利用规划对土地的数量结构进行合理的资源配置。第二、通过优化土地利用空间结构,控制区域土地利用景观格局。
[Abstract]:Changsha is in the stage of rapid development of urbanization. With the further development of urban-rural integration, the urban and rural junction of Changsha is constantly radiating outward with the center of urban area as the center. The contradiction between land use and protection in urban and rural areas is becoming more and more serious, and the regional landscape pattern has changed significantly. Based on three issues of satellite remote sensing imagery and related data in 1991, 2004 and 2013, and based on the theory of landscape ecology, The response characteristics of land use change and landscape pattern in urban and rural areas of Changsha for 23 years were analyzed by constructing a two-stage data envelopment model, and the different response levels between land use and landscape pattern were identified. The structure equation model was used to verify the land use structure, landscape pattern and its ecological service function in order to provide reference for the decision of land use structure adjustment. The main conclusions are as follows: (1) the scope of the study area is greatly expanded, and the land use types are frequently transformed. From 1991 to 2004, the urban and rural areas have been expanded, the comprehensive use of land has been greatly increased, and the urban and rural areas have been further expanded in 2004. But the degree of comprehensive land use is declining. 2) the heterogeneity of land use landscape is obvious and the complexity is increasing. The small patches were integrated in the urban and rural areas of Changsha during the study period, while the large patches of land use dominance type showed a positive trend of outward expansion. The diversity of landscape increased, the proportion of different landscape types decreased, the heterogeneity and complexity of landscape increased, all kinds of land landscape tended to be fragmented, and the spatial variation of landscape pattern and ecological response was prominent. The stage characteristic appears. The structural equation model verifies the correlation between land use and landscape and ecological function. The two-stage data envelopment model quantitatively shows that the spatial variation law of land use landscape pattern response coefficient is different from the response law of land use ecological service. There is also a difference from the total pattern response of land use. 4) the ecological response of land use pays attention to quantity allocation and pattern optimization. The method of solving the relaxation variable of the data envelopment model provides a quantitative path for the land use control measures. Firstly, by adjusting the land use structure, the land use planning is used to allocate the rational resources of the land quantity structure. Secondly, by optimizing the spatial structure of land use, we can control the landscape pattern of regional land use.
【学位授予单位】：湖南师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：F301.2

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