| With the advancement of economic globalization and urbanization,the process of land cover change has been accelerated and enlarged.As a natural element in the complex ecological network system of urban society,economy and nature,green space landscape has been encroached and destroyed by human activities,resulting in serious damage to the ecological structure of green space,and its ecological function and service capacity have been declining.However,the construction of ecological civilization is a thousand years plan for national development,which is of great significance to the harmonious coexistence and common development of human and natural environment.Under the background of the contradiction between economic construction and environmental protection,and the construction of ecological civilization leading to common development,this thesis studies the characteristics and laws of urban green space ecological space-time change,discusses the driving force of natural environment and socio-economic factors on the green space system,and then plans and constructs the green space ecological network in line with the urban ecological structure and policy layout.This is of great significance for the rational layout of green space sources,the protection of the connectivity of green patches,the maintenance of the healthy flow of ecological process,the balance of the contradiction between green space ecology and economic development,and the promotion of mutual integration and complementarity between building space and green space network structure.Based on the above background and significance,firstly,this thesis selects 2010,2015 and 2020 Landsat remote sensing image data to classify the landscape types of Jinan city and extract green patches,and then quantitatively analyzes the green landscape changes in the study area in the process of urbanization from four aspects: each landscape area,single landscape dynamic degree,each landscape transfer matrix and landscape index analysis;Secondly,through the three modules of factor detection,interaction detection and ecological detection,this thesis explains the influence of natural factors and human social and economic activities on the process of green landscape change from three aspects of factor explanatory power,double factor effect and double factor significance influence mechanism,then it provides a scientific theoretical basis for the selection of resistance factors and the assignment of resistance weight in the ecological network;Finally,based on the "patch corridor matrix" theory,combined with morphological spatial pattern analysis,landscape connectivity and species penetration theory,minimum cumulative resistance and gravity model theory and method,this thesis constructs the green space ecological network and planning layout of Jinan city through the basic mode of "determining green space ecological source patch-Establishing comprehensive resistance surface-constructing ecological network and evaluation".It is hoped that this thesis can provide scientific basis for decision-making and planning of urban ecological civilization construction.The results are as follows:(1)From 2010 to 2020,there is a transfer trend of "cultivated land → grassland →garden and forest" in landscape types,and the green space area keeps increasing as a whole.The urban construction and expansion make grassland decrease rapidly,policies such as afforestation subsidies,land conversion to forest and environmental protection publicity accelerate the growth of garden and forest landscape.The fragmentation of the whole landscape increases,the patch becomes complex,irregular,and the edge effect is enhanced,which is conducive to the species exchange of different adjacent landscapes,but weakens the connectivity between the dominant patches and the risk resistance of the dominant groups.Natural and social factors such as urbanization process and human production and life have both driving and resistance effects on the change of green space landscape.(2)Both natural factors and social factors have driving effects on the change of green space landscape.The two natural factors of elevation and annual average temperature change have the strongest explanatory power,followed by the two socio-economic factors of population change and GDP change per unit area.The results show that the coupling driving effect of natural factors and socio-economic factors on the spatial distribution of green space landscape is indispensable,and the two factors play a decisive role in the distribution of green space landscape pattern in the study area.There are three different mechanisms among the 10 driving factors.(3)Combined with the "fourteenth five years plan" and the long-term goal of 2035 in Jinan city,a total of 15 green land ecological source areas were selected in the Yellow River ecological landscape belt of Jinan city and the ecological barrier area of Mount Tai in the south.The resistance surface was constructed with six resistance factors of landscape type,elevation,slope,human activity intensity,road and railway.A total of 215 ecological greenways were built in the study area,with a total length of 153 km,including 151 primary ecological corridors and 64 secondary ecological corridors;A total of 123 ecological nodes were extracted,including 64 primary ecological nodes and 59 secondary ecological nodes.The network structure evaluation shows that the ring degree closure index is 0.39,the line point rate is 1.75,and the network connectivity is 0.60.The corridor density in Huaiyin district,Tianqiao district,Licheng district,Changqing district,Zhangqiu district and Gangcheng district is relatively high,and the primary ecological nodes are mainly concentrated near the south bank of the Yellow River in Licheng district and Zhangqiu district.The secondary ecological nodes are mainly concentrated in the ecological source areas of southern mountainous areas in Licheng district and Zhangqiu district.As a whole,the ecological corridor network is dense and the network structure is complex,which can effectively connect the ecological sources to form a closed network.This thesis finally plans the green space ecological pattern of "one belt,one water corridor,three green corridors and five zones" in Jinan city,which not only points to the ecological pattern of " Blending into the mountains and rivers,Meeting Mount Tai and the Yellow River " in the garden planning of Jinan city,but also conforms to the new urban development pattern of "strong in the east,prosperous in the west,beautiful in the south,starting from the north and excellent in the middle".The planning of this thesis is the same as the overall vision of green development of beautiful spring city. |
PDF Full Text Request