Research And Application Of Land Use System Health Assessment Method Based On Multitemporal Remote Sensing Data ——A Case Study Of Liaoning Province

With the rapid development of social economy,the disturbance of land use system by human activities has gradually increased,and the health status of land use system has also received extensive attention.The healthy use of land and the rational use of land resources are not only related to the balance and stability of the ecosystem,but also to the smooth guarantee of human supply and demand,and are the only way to achieve sustainable development goals.However,how to establish a scientific and reasonable land use system health index system to characterize land use status,and what method to use to comprehensively measure the impact of human activities on land use change are issues worthy of attention and in-depth discussion.In this paper,taking Liaoning Province as an example,based on the research on regional land use system health assessment methods,with the help of multi-temporal remote sensing image data from 2000 to 2020,and the application of GIS-related tools and software,a multi-temporal,multi-scale,multi-Dimensional land use process evolution analysis and land use system health evaluation,comprehensively estimated the health status of the land use system at the provincial,functional and municipal scales in the past 20 years,and revealed the main factors affecting the health of the land use system in Liaoning Province.Provide technical and data support to ensure the healthy and sustainable development of land use systems in the region.The results of land use analysis in Liaoning Province,different functional divisions within the province,and cities show that: from 2000 to 2015,the area and proportion of various types of land in Liaoning Province did not change much.Substantial change.In the Shenyang metropolitan area,forest land,as a dominant land type,plays an important role in ecological protection;construction land in the coastal economic belt plays a pivotal role in economic development;cultivated land in northwest Liaoning accounts for a relatively large proportion,and agriculture is in the middle of the regional economic development.important position.The differences in land use between cities are more obvious.The results of the health evaluation of the land use system in Liaoning Province showed that during the study period,the comprehensive health index of the regional land use system was below 0.6,and the health level of the land use system was low.But overall,from 2000 to 2020,the health index of the land use system in Liaoning Province generally showed an upward trend,and the health status of the land use system was generally improving.Based on the spatial scale of the three major functional divisions of Liaoning Province,the internal spatial differentiation of the Shenyang metropolitan area from 2000 to 2020 was not particularly obvious,and the differences in the health status of the land use systems in each city were not significant,indicating that the economic level of the district during the period from2000 to 2020 The development trend is generally the same,and the impact on land use is generally similar,and the land use conditions of each city may be related to each other;for the coastal economic belt,the spatial differentiation of the health of the land use system has always been large,and the health status of the land use system in each city is also different.Large fluctuations;for northwestern Liaoning,the health status of land use systems in Chaoyang City and Fuxin City was ill before2015,and turned to a healthy state in 2020,with a large degree of change.The health status of land use systems in Tieling City changed during the study period Not big,from a critical state to a sub-healthy state,and finally to a critical state.The results of the analysis of factors affecting the health of the land use system in Liaoning Province show that the unreasonable land use is the main factor restricting the health of the land use system in Liaoning Province,which is manifested as poor diversity of land types,high degree of land use,and single land use structure.In addition,population density has a greater impact on the health of land use systems.While the area of construction land is gradually increasing,attention should be paid to the protection of forest land,grassland and water area,efficient use of various types of land,and increasing the degree of land use intensification,which is conducive to the improvement of the health level of the land use system.