Analysis And Optimization Of Land Use Landscape Pattern Of Fengtai District In Beijing

The dynamic change of landscape pattern is a reference for studying the alternate evolution of natural landscapes.By analyzing the results of the changes,the landscape changes can be grasped macroscopically in order to regulate and control.The changes in land use structure and type can reflect the development of urban and rural areas on the one hand,and help researchers formulate reasonable land application plans on the other hand,and promote the benign and sustainable use of land.This study uses high-resolution satellite imagery as the data base,uses spatial analysis methods and geostatistical methods to analyze the land use status of Fengtai District in 2012 and2018,and aims to optimize land use methods while grasping the dynamic changes of landscape.Propose a reasonable land use allocation plan,and provide scientific basis and guidance value for promoting the ecological and economic development of the city.The main research contents and results in this study include:(1)Investigate the current status of land use in Fengtai District in 2012 and 2018.Through the supervised classification and unsupervised classification of the 2012 Quick Bird(Quick Bird)and 2018 High Score No.2(GF-2)images,the maximum likelihood classification accuracy is 77%,and the ISODATA classification accuracy is 75.3%,the land use types of Fengtai District were divided into forest land,agricultural land,water body,construction land and unused land,of which the area of agricultural land and unused land decreased in 2018 compared with 2012,and the area of agricultural land decreased The largest range is 371.85hm~2;the area of the other three types of land has increased in varying degrees compared with 2012,with a net increase of 310.42hm~2 in forest area.(2)Mastered the dynamic changes of land landscape in 2012 and 2018.From the perspective of landscape change characteristics,there are 14 types of mutual transfer relations of various types of landscapes in the study area during 2012-2018,of which the cumulative contribution rate of the mutual transfer of agricultural land landscape,forest land landscape and construction land landscape accounts for 79.30%of the total transfer network,that is The above three landscapes transfer to each other determines the overall change characteristics of the landscape pattern in the study area in the past six years.The distribution area of each landscape type decreases with the increase of altitude,and is mainly distributed in the slope range of 0-5°.The most drastic landscape change is the agricultural land landscape.The areas with drastic changes are generally distributed in dots,mainly distributed on the edges of different landscapes in the southeast and southwest.From the changes in these 6 years,it can be found that the connectivity of various landscape types has been strengthened,the resistance to the operation of regional landscape flows has been reduced,and the current landscape pattern characteristics of Fengtai District have contributed to the maintenance of urban ecological stability,but Reasonable configuration and further optimization are still required.(3)Guiding suggestions for land use structure optimization were proposed.By analyzing the land use structure and quantitative characteristics of Fengtai District,it can be seen that the land use diversification index in 2018 is 0.57,the uniformity of land distribution of various use types is extremely poor,the diversification index is low,and the ratio difference between each type is relatively high.Large,with a large proportion of forest land and construction land,less unused land,uneven land use,and simple land use structure.Proposed countermeasures and suggestions for the implementation of land use structure optimization programs,including strengthening population and land management,promoting land ecological construction,tapping the potential of construction land and strengthening management,and scientific use of land.