Analysis on forest spatial distribution based on DEM
ZENG Hong- da,CHEN Guang- shui, YANG Yu- sheng(College of Geographical Science, Fujian Normal University, Fuzhou 350007, China)
Considering there was a close relationship between spatial distribution of forest resource and terrain, we calculated and discussedthe proportion and causes of forst spatial distribution in Wuyi mountain city based on the Arcgis and its extensional module (3D spatialanalysis), besides, we express the attributes of topographical distribution of the three dominating forest by use of three- dimensional forest formprofile map. The result of this research indicated that, because of human disturbance, broad- leaved trees, which is dominant species tend tomove back to higher elevation and more precipitous places; Cunninghamia lanceolata gradually took up the dominating status of forests duringlong- term of manual work, and mostly spread in the hill that below 500m; Pinus massoniana has a wider suitable establishment, and inclineto grow in (half- )sunny- slope. Thus it can be seen , dominant natural condition endows the forest region of Wuyi Moutain with diverse andabundance natural forest resources, in addition, terrain had become one of the significant factors that affected tree distribution, however, dueto the manual management and administration, spatial pattern of natural forest had been greatly influenced.
【CateGory Index】： S718.5;