基于3S技术闽江入海口沿岸林地质量等级评价研究

以闽江入海口沿岸试验区林地为研究对象,对林地质量从数量结构及空间结构进行了探讨。结果表明,3级林地数量占绝对优势,占总面积的38.14%。其次是4级林地面积,占总面积的29.15%,1级和5级面积比例都较少,分别占总面积的6.44%和5.58%。林地质量综合分布,南部要优于北部,5级林地南部占多数。南部、北部所占比例分别为55%、45%;4级林地面积绝大部分分布于南部,南部、北部所占比例分别为73%、27%;3级林地面积北部分布较多,南部、北部所占比例分别为61%、39%;林地质量为1级的林地南部也较多,但总数量很少。南部、北部所占比例分别为89%、11%,面积分别为609hm2、75hm2。

3S-based evaluation research on the coastal forestland quality rank of Minjiang River Estuary

The forestland quality at the experimental region of coastal forestland at Minjiang River Estuary as the research object, is discussed in quantity and spatial structure. The re- sults show that the 3-1evel woodland area is the largest, accounting for 38.14% of the total area, followed by the 4-level forest area accounting for 29.15% of the total area, l-level and level 5-level forest area accounting for 6.44% and 5.58% of the total area, respective-ly. In terms of Forestland comprehensive distribution in quality, the south area is superior to the north, with 55% and 45% 5-level forestland, and 73% and 27% 4-level forestland of the total south area, respectively. However, 61% 3-level forestland distribution in the north area is obviously larger than that of 390% in the south area. In addition, the 89% 1 - level forestland area in the south is extremely larger than that of 11% in the north, but with smaller quantity, reaching 609 hm^2 and 75 hm^2 , respectively.