| Reasonable and orderly new urbanization can promote the improvement of land use efficiency,and the efficient use of land can provide sufficient resources and space for the further development of new urbanization,which in turn promotes the improvement of the development level of new urbanization.In this paper,the urban agglomeration around Poyang Lake is selected as the research area.Using the current land use map and statistical yearbook of relevant years,the new urbanization and land use efficiency of urban agglomeration around Poyang Lake in 2000,2005,2010,2015 and 2019 are calculated by using analytic hierarchy process,SBM undesirable,coupling coordination model and other methods,And positioning the coupling and coordination stage of the two,the main conclusions are as follows:(1)From 2000 to 2019,the overall level of new urbanization in the urban agglomeration around Poyang Lake continued to rise from 0.1242 to 0.2895,and the imbalance in the development level of new urbanization in the region was alleviated.Among them,the levels of economic urbanization,population urbanization,social urbanization and spatial urbanization increased,and the level of Ecological Urbanization decreased.From the perspective of space,the spatial distribution pattern of new urbanization has gradually changed from "high in the East and West,followed by the middle,and low in the north and South" to the arch bridge distribution with high level of new urbanization in the middle and low in other directions.The regions with better development and construction of new urbanization show significant urban orientation.(2)From 2000 to 2019,urban land use efficiency experienced a "W" type fluctuation process.The average urban land use efficiency decreased from 0.4820 to 0.4173,and the number of effective decision-making units decreased from 10 to 6,showing a spatial distribution pattern of "high in the middle,low in the South and North,and obvious changes from east to west".The efficiency of agricultural land increased from 0.6608 to0.6697,and the number of effective decision-making units decreased from 12 to 10.The efficiency of agricultural land in the central region increased significantly,while that in the East,West,South and North decreased.Among them,the extensive utilization of agricultural land in districts and counties in the North was more serious.The ecological land use efficiency shows an inverted "N" shape change trend,with the average value rising from 0.6921 to 0.7036.The ecological land use efficiency of districts and counties in the North has improved,and the ecological land use efficiency of districts and counties in the central has decreased slightly,showing a spatial distribution pattern of "the north is higher than the south,and the west is greater than the East";From the perspective of total land use efficiency,from 2000 to 2019,the overall land use efficiency of urban agglomeration around Poyang Lake showed an inverted "V" trend,and the average efficiency decreased from 0.7823 to 0.6734;The number of effective decision-making units decreased from 23 to 17,and the coefficient of variation increased from 0.2731 to0.3547,widening the gap in the level of intensive and economical use of regional land.From the spatial scale,the total land use efficiency presents the spatial distribution form of "high in the middle,low in the northwest and East".The total land use efficiency in the central region is stable,and the total land use efficiency of districts and counties in other directions has decreased by varying degrees.(3)From 2000 to 2019,there is a certain correlation between various types of land use efficiency and various subsystems of new urbanization.Specifically,urban land use efficiency has the highest correlation with population urbanization and the lowest correlation with spatial urbanization,but the role of population urbanization in improving urban land use efficiency is weakening.Agricultural land use efficiency is more closely related to population urbanization,social urbanization and economic urbanization,but it is less related to population urbanization and Ecological Urbanization,and more related to economic urbanization,social urbanization and spatial urbanization.The efficiency of ecological land use is no longer limited to the impact of a single process of ecological urbanization.Economy,society and space are having a more and more important impact on the efficiency of ecological land use.(4)From 2000 to 2019,the average value of the coupling degree C and coordination degree D between the new urbanization and the overall land use efficiency of the urban agglomeration around Poyang Lake showed an inverted "N" change trend.The overall coupling and coordination level began to decline from the high-level coupling stage to the running in stage,and the overall coupling and coordination relationship deteriorated.After the classification of the coupling coordination degree,it is found that the coupling coordination degree of new urbanization and land use efficiency of the urban agglomeration around Poyang Lake presents the distribution characteristics of "olive shape".The main coupling coordination stage changes from reluctant coordination to "mainly mild imbalance,close to imbalance and more reluctant coordination",and the coupling coordination decreases.From the perspective of spatial scale,the positive spatial distribution effect of coupling coordination degree has increased,showing a trend of "rising in the middle and declining in other regions".The number of districts and counties included in the levels of intermediate coordination,primary coordination and forced coordination has gradually decreased,the area near imbalance has expanded in the northeast and southwest,and the slight imbalance is in the northwest of urban agglomeration In the eastern region.(5)According to the classification results of coupling coordination,the coordination area will strengthen the protection of the ecological environment,increase local investment in medical treatment,education,social security and other aspects,and ensure the unity and consideration of social resource distribution.On the verge of maladjusted areas and maladjusted areas,we should find out their own development orientation,clarify the regional development advantages,and use high technology to carry out the transformation and upgrading of traditional industries,so as to improve the level of local economic development;At the same time,maladjusted areas should adopt various measures such as encouraging rural collective economic organizations to establish cooperatives,guiding farmers to reasonably plant cash crops,and increasing investment in energy conservation and emission reduction,so as to improve the coupling and coordinated development level of regional new urbanization and land use efficiency. |
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