基于3S技术闽江入海口沿岸林地质量等级评价研究

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

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。

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.