Study Of Beijing Forest Land Utilization Planning Using GIS/RS

Forest land is an important part of forest resources.The scientific planning of forest resources in the region has an important influence on the full utilization of forest land resources and the good construction of ecological environment.In this paper,Beijing as a research area,the use of RS and GIS as a technical means of research.The remote sensing image classification results show that the area of forest land(forest)in the plain area of Beijing is 1643.10 kn2,accounting for 24.60%of the total area of the plain area and 8444.79 km2 in the mountainous area,accounting for the total area of the mountain area df the 86.75%.In the next five years,the forest land development in mountainous areas is dominated by forest land protection.The demand for forest land in plain area is 360.38 km2.The optimal linear programming model was established by using the cost function,coverage rate,farmland red line and carbon balance as the constraint condition.Combined with the matrix of afforestation cost coefficient and solid carbon benefit coefficient matrix.The forest land use planning model for 2016-2020 is:MaxG=448.39X11+561.43X12+517.24X13+159.92X14+433.05X21+542.23X22+499.55154.45X23+555.25 X24+695.23X31+640.51X32+198.03X33+X34+343.62X41+430.26X42+396.39X43+122.56X44+607.04X51+760.09X52+700.26X53+216.51X54,funding constraints:∑j=1n∑j=1m VijXij≤5519500;Coverage growth constraints:∑j=1n Xi/S≥30%;The basic farmland constraints:X4j≤299.47;Carbon absorption line balance constraints:∑i=1 n X≥997.27.Using the Lingo software solution,the global optimal solution is get and the objective value is 42405.552.The area of forest land used in the plain area of Beijing is expected to increase by 360.38 km2 to 2027.15 km2 from 2016 to 2020.The forest land plan is as follows:the farmland is converted into forest land 262.37 km2,the unused land is converted into forest land 76.63 km2;the existing forest land,the forest land and the forest land are not fully utilized forest resources,so it is planned as forest land and shrub land The Among the different forest types,the new broadleaved forest area is the largest,147.85 km2,the mixed forest is 132.81 km2,the coniferous forest and the shrub are less,all are 39.86 km2.The preliminary planning results of forest land use in Beijing were obtained using the spatial analysis.