摘要
以国产软件Geoway为数据加工平台,对安徽省东至县梅城林场1∶10 000地形图等高线进行矢量化采集,然后以Shp格式导入ArcGis,生成数字高程模型(DEM)。利用ArcGis的空间分析功能,对梅城林场坡度、坡向和地面粗糙度等地形因子进行分析。结果表明:极端和非常脆弱的林地面积占林场总面积的28.65%,比较脆弱和一般的林地面积占林场总面积的71.35%,总体生态脆弱度较小;不同坡向面积比例依次是南坡>东南坡>平坡>西坡>东坡>北坡>西南坡>西北坡;地面粗糙度总体在1～1.45之间,但1～1.15之间的面积最大,占梅城林场总面积的78.18%,说明梅城林场总体地形起伏不大,土壤侵蚀程度较小,生态安全性较高。同时,也反映梅城林场总体营造林作业施工难度较低。
Based on the Geoway software system,the vector data of the contour line and elevation value of 1∶10 000 topographic diagrams were collected for Meichen Forest-farm in Dongzhi county of Anhui Province,which was saved as the SHP files.The digital elevation value model was built based on SHP files in ArcGis software.The factors of the slope,aspect and ground roughness were analyzed using the function of the spatial analysis of ArcGis.The results showed that both the extremely and the very fragile woodland areas were accounted for 28.65% and the relative fragile and general woodland accounted for 71.35%.The areas of different slopes were in the oder of southern southeastern flat western eastern northern southwestern northwestern.The ground roughness was between 1 and 1.45.But the areas between 1 and 1.15 were accounted for 78.18%.This indicated that the terrain undulating was not great and the soil erosion was small as well as the ecological security was higher in the Meichen Forest-farm.At the same time,it also reflected that the difficulty of afforestation was lower in the Meicheng Forest-farm.
出处
《林业科技开发》
2011年第4期85-88,共4页
China Forestry Science and Technology
基金
国家自然科学基金项目(编号:31070569)
