Research On Optimal Allocation Of Land Resources In Luanchuan County Based On Ecological Carrying Capacity

The limited nature of land resources makes people constantly adjust the structure and layout of land use to achieve the maximum benefits of land resources.However,in recent years,China has accelerated the process of urbanization.In the process of development of land resources,the use of unreasonable land use methods has destroyed the ecological environment of the land.In order to develop the economy,Luanchuan County began to vigorously promote the strategy of "industrial rich counties".The construction land has surged,the quality of cultivated land has been declining year by year,and the ecological system of the land has been damaged to some extent.In order to realize the sustainable development of land resources in Luanchuan County,it is of great significance to optimize the land use structure and layout from the perspective of land ecological carrying capacity,This paper first analyzes the current situation of land resource utilization in Luanchuan County and the changes of various types in 2007-2016,and then uses the ecological footprint method to measure the ecological carrying capacity of the land in Luanchuan County during the decade.Finally,using the multi-objective linear programming model and the CLUE-S model,the land resources of Luanchuan County in 2025 are optimized from the perspective of ecological carrying capacity.The main conclusions of the study are as follows:(1)The status of land use in Luanchuan County and the dynamics of the past ten years are as follows:1 The current land use in Luanchuan County is mainly agricultural land,accounting for 91.52%of the county's land,and the proportion of construction land is only 5.01%.The land utilization rate reached 96.75%;2 the demand for cultivated land and construction land increased year by year in 2007-2016,and the trend of declining forest land and natural reserve was obvious.In the past 10 years,the land with faster change in area was the garden land and urban and rural construction land.Grassland.(2)The change of land ecological carrying capacity in Luanchuan County in the past ten years is as follows:(1)the per capita ecological footprint has increased,and the ecological carrying capacity of the land has increased overall,but the per capita ecological carrying capacity has declined;2 before 2016,the land of Luanchuan County The ecological carrying capacity is relatively high and has always been an ecological surplus.However,the per capita ecological surplus has been decreasing.In 2016,there was a deficit and the ecological deficit was 0.0111 hm2/person.It indicates that the current land ecological carrying capacity of Luanchuan County is already on the verge of overload,which is not conducive to the sustainable development of land resources.(3)This paper optimizes the land use structure of Luanchuan County,and takes the ecological carrying capacity of the land as one of the objectives of the multi-objective linear programming model.Two schemes are obtained,and the economic and ecological schemes are selected as the best solution.After optimization,the proportion of cultivated land is 27.38%,the proportion of garden land is 1%,the proportion of forest land is 63.21%,the proportion of grassland is 1.90%,the proportion of construction land is 5.56%,the proportion of water area is 0.9%,and the proportion of unused land is The ratio is 0.05%.Comparing the economic and ecological equalization plan with the current situation in 2016,the ecological carrying capacity and economic benefits of the land are greater than the current situation.(4)Taking the economic and ecological equalization plan as the land demand in 2025,combined with the CLUE-S model to optimize the spatial layout of land use in Luanchuan County in 2025.The results show that the spatial distribution characteristics of local transformations in Luanchuan County during 2016-2025 are:the newly added cultivated land is mainly distributed in the relatively flat area in the southern part of Luanchuan County,and the newly added gardens and newly added forest land are mainly distributed in Luanchuan County.In the northern mountainous areas,the newly added construction land is mainly distributed in the dam area of the southern part of Luanchuan County.The distribution of spatial distribution of various types is consistent with the topographical distribution characteristics of Luanchuan County.