Assessment Of Sustainable Development Goals In Guangxi Based On Land Use Change

In 2015,the United Nations Commission on Sustainable Development proposed the Sustainable Development Goals(SDGs)for 2030,which are of great significance in guiding global sustainable development.Human activities interact with nature through land use system.With the continuous development of society,human’s land use is becoming more and more flexible.The impact of land use type change is also an important part of regional sustainable development research,which affects and even determines the realization of regional sustainable development goals.In order to better monitor regional sustainable development,this study took Guangxi Zhuang Autonomous Region as the research area under the guidance of the United Nations Sustainable Development Goals,and reconstructed the land use/land cover data of Guangxi by combining remote sensing data and statistical data.In the study area,a multi-objective evaluation index system for sustainable development is constructed at the district level in 2020 and at the prefecture level from 2000 to 2020.Through the calculation and analysis of the data,it shows the difference in time and space of sustainable development in Guangxi.The results of this study are as follows:(1)The existing remote sensing data of land use/land cover were used to evaluate the applicability of each product in Guangxi through data reclassification,type similarity analysis,comparative statistical analysis of a single land class and comparative verification of high-resolution remote sensing images.Based on the evaluation results and spatial consistency analysis,the fusion method is proposed to reconstruct the land use data in2020 and the long-term time series data in 2000,2010 and 2020 in Guangxi.(2)Construct multi-objective index system of sustainable development in Guangxi,and analyze SDGs scores of cities/districts/counties in Guangxi based on principal component analysis.The comprehensive score at the level of district,county(city)shows that the sustainable level of the relatively flat southwest region is higher than that of other regions.At the prefecture-level level,the multi-objective comprehensive score of sustainable development in most regions of Guangxi was low during 2000-2020.Nanning City,Liuzhou City and Guilin City in the past 20 years are higher than other cities,the development degree is better.The average score of the whole province increased first and then decreased.(3)By means of regression analysis,the relationship between land use and sustainable development score in Guangxi region was analyzed from the Angle of absolute area and rate of change.According to the change results,the dynamic changes of cultivated land,water body and impervious surface land of all cities in Guangxi region have obvious positive correlation with the comprehensive score of sustainable development.Therefore,in order to achieve the sustainable development goals in 2030,the comprehensive improvement of Guangxi region is proposed.Based on the reconstruction of land use/land cover data applicable to the region,this paper analyzes the land use change in the region in terms of change rate and area.According to the United Nations Sustainable Development Goals(SDGs),the multiobjective evaluation index system of Guangxi sustainable development was constructed from two scales respectively,and the differences of SDGs scores in different regions were evaluated in time and space scales.The relationship between land use change and SDGs score was obtained through correlation analysis.The research can provide data and decision support for the sustainable development of Guangxi.