Research On Ecological Space Restoration In Hanzhong City Based On Ecological Security Pattern

In recent years,China’s rapid development has brought a series of ecological and environmental problems,which have seriously affected the development of China’s economy.In order to promote the construction of beautiful China and achieve sustainable development under China’s new normal,it is essential to establish a sound ecological security system and to carry out ecological restoration of the region from the perspective of ecological security pattern.This paper takes the whole area of Hanzhong City as the research area,analyzes the land use data of Hanzhong City from 2010 to 2020,reveals the temporal and spatial change characteristics of various types in Hanzhong City,and diagnoses the ecological security problems of Hanzhong City.Guided by the minimum cumulative resistance model and circuit theory,according to the research paradigm of "identifying ecological source-extracting ecological corridor-identifying key areas",the ecological security pattern of Hanzhong city is constructed.According to the analysis results of ecological security problems and ecological security pattern in the study area,combined with the actual local physical and geographical conditions,the ecological restoration zoning of "two rivers and two screens" is constructed,and the restoration strategy suggestions are put forward..The main results of this paper are as follows:1)During the 10-year period from 2010 to 2020,the rapid development of Hanzhong City has had an impact on the local ecological environment.The contradiction between human and land has intensified,the land types such as arable land and water bodies have been reduced,and their patch shapes tend to be complex and fragmented,leading to the damage of farmland ecosystem quality and forest ecological service functions.2)The results of ecological security pattern construction show that the ecological source sites in the west side of Hanzhong City are fragmented and scattered,while the ecological source sites in the north and south side are distributed in patches,and some of the potential ecological corridors are thin and narrow with poor connectivity,which should be managed with emphasis according to the importance of each corridor,and the ecological pinch points and ecological barrier areas in Ningqiang County,Loyang County,Liuba County and Yang County,where there are more ecological pinch points and ecological barrier areas,should be maintained and restored with emphasis.3)The proposed restoration strategy is guided by the concept of ecological security pattern,which can well meet the principles of territoriality,systematization and integrity required by the concept of "community of life in mountains,water,forests,fields,lakes and grasses" and help the development of national spatial protection and restoration work.