Study On Land Function Change And Carbon Emission Effect In Wide Beach Area Of The Lower Yellow River

With the rapid development of economy,the large amount of carbon dioxide produced by human activities is the main root cause of the intensification of greenhouse effect.The greenhouse effect will have a large negative impact on human production and life,and the carbon emission produced by people in the process of land use is the main source of carbon,so it is an urgent need for China’s current social development to study the change of land function and its carbon emission effect,and to explore the low-carbon transformation of land function.Based on the remote sensing data of land use in the lower reaches of the Yellow River from 1980 to 2020,this paper analyzes the characteristics of spatial and temporal changes and transfer transformation of each type of land function land in the study area,investigates the impact intensity of each driver on land function changes in the lower reaches of the Yellow River and the mechanism of interaction using geographic detectors,and then accounts for the carbon emissions in the study area by combining the fossil energy consumption data,and studies the recent The carbon emission characteristics of the lower Yellow River broadshore area in the last 40 years were studied,and the factors affecting carbon emission in the lower Yellow River broadshore area were analyzed by using the LMDI factor decomposition model.The relevant findings can provide reference for the study of land function optimization and its sustainable development in the study area.The main contents and results of this paper are as follows:(1)The economic and water-sand function sites cover the largest area and have the widest distribution.The former is distributed along the river in a belt pattern,with a trend of "sharp increase-weak decrease-stable";the latter is distributed along the river,with a general trend of "sharp decrease-slow increase-stable";(2)The transformation of land function is mainly based on the mutual transformation of water and sand functional land and economic functional land.Water-sand functional land is mainly transformed into economic functional land,while the expansion of economic functional land is mainly at the expense of water-sand functional land and part of ecological functional land;(3)Soil type and population spatial distribution are important drivers of land function change in the study area,and the interaction among the drivers shows a two-factor enhancement and non-linear enhancement of the spatial and temporal variation of land function change;(4)The net carbon emissions in the broad beach area of the lower Yellow River are in a state of continuous increase,and the increase is large.The change of carbon source is larger,the change of carbon sink is smaller,and the change of carbon sink is much smaller than the increase of carbon source.Among them,the highest carbon emission intensity is the economic function land,and its expansion is the main reason for the increase of net carbon emission in the lower Yellow River broadshore area;(5)Throughout the study period,the level of economic development is the main driver of net carbon emission growth,while carbon intensity is the key factor contributing to net carbon emission growth.Although the pulling effects of land structure and population development on carbon emissions in the study area are relatively weak,land use efficiency has the most significant effect on curbing emissions;(6)Overall,the relationship between carbon emissions and economic growth in the lower Yellow River broadshore area is weakly decoupled.Although this decoupling state is relatively stable,only land use efficiency can provide a positive contribution to this virtuous development;carbon emission intensity,land structure effect factor,economic development level and population development factor play a negative inhibitory role,among which,the strongest inhibitory factors are carbon emission intensity and economic development level.