Study On The Relationship Between Multi-function Of Land And Land Use Landscape Pattern In Changli County

In recent years,with the accelerating process of urbanization,the construction land has continued to increase,agricultural land and ecological land have been continuously occupied which led to the increasing scarcity of land resources.Under this background,carrying out studies on the relationship between land use and land use landscape pattern,which ease the conflict between land supply and demand and provides scientific reference for governments at all levels to make scientific land use decisions.Taking Changli County as the research area,this paper took the land use change database of 2004,2009,and 2015 as the basic data sources,and used ArcGIS platform to quantitatively analyze the spatialtemporal change of land use landscape pattern.The correlation between land use landscape pattern and land multi-functional was quantitatively studied by using grey relational degree and RDA sorting method.The main conclusions were as follows:(1)From 2004 to 2015,the main landscape types in the study area were arable land and construction land.The changes in the quantity structure of land use were as follows: The unused land,garden plot,and water areas decreased,and the area of other five land types increased.The largest increase was arable and the largest decrease was unused land.The change of landscape pattern indicated that the degree of landscape fragmentation was intensified,the shape of plaque became complex and irregular,and the degree of plaque aggregation was high,the landscape types had a tendency of unification and unequal distribution,the adjacency probability of different patch types was decreasing.At the plaque type level,the plaques of arable land,other agricultural land,and construction land were gradually fragmented,the shape of these plaques became more complex and irregular,the aggregation degree between these plaques increased.The fragmentation degree and aggregation degree between plaques of garden plot and unused land were decreased.The distance between patches and adjacent probability of traffic water land,other agricultural land,water land were reduced.The aggregation degree of the forest lands increased.(2)The improved mutation progression method was used to evaluate land production,ecology,living and total functions of Changli County in 2004,2009 and 2015.According to the evaluation results,the production,living,and total functions of all towns in Changli County were significantly improved.The coefficient of variation was reduced,respectively,indicating a significant decrease in spatial differences in production,living,and total functions.In terms of ecological functions,only the ecological functions of Longjiadian Town,Matuodian Town,and Ruhe Town improved,while the other towns decreased.There was an increase in the coefficient of variation of ecological function,indicating that the spatial difference in ecological functions increased.(3)The correlation between land landscape pattern and land functions was analyzed by using grey relational analysis and RDA sorting analysis.The results showed that PD index had a significant negative correlation with land production function,AWMSI index had a significant negative correlation with land ecology and total functions,SHDI index had a significant negative correlation with land living functions.The land production function and total function had significant negative correlations with the PD and AWMSI indices of arable land and other agricultural land,and had significant positive correlations with the MNND index of construction land.The land ecological function had a negative correlation with the PD index of garden plot and the MNND index of forest land,and had a positive correlation with the PD index of unused land and the AWMSI index of water area.The land living function had a significant negative correlation with the PD index of construction land and arable land and the AWMSI index of garden plot.This study provides theoretical and methodological support for multi-function evaluation of land,and provides scientific reference for the governments at all levels in Changli to formulate scientific land use overall planning and land use decision.