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基于2007年Landsat TM遥感影像和影响防护林的主导环境因子,对三峡库区的森林立地进行分类,并通过选取水源涵养量、生物量和林分生产力3个指标,利用多目标灰色局势决策模型对库区现有的针叶林、阔叶林、针阔混交林和灌木林4种防护林类型进行空间优化配置.结果表明:2007年,三峡库区森林立地可划分为40种类型;空间配置优化后,研究区针叶林、阔叶林、针阔混交林和灌木林的面积比例分别为32.55%、29.43%、34.95%和3.07%.与优化前相比,优化后针叶林和灌木林的面积比例分别减少了8.79%和28.55%,阔叶林和针阔混交林分别增加了10.23%和27.11%.通过防护林类型的空间优化,三峡库区整体的水源涵养能力、生物量和林分生产力分别增加14.09×108m3、0.35×108t和1.08×106t.
Based on the 2007 Landsat TM remote sensing images and the dominant environmental factors affecting shelterbelts, the forest sites in the Three Gorges Reservoir Area were classified. Based on the three indicators of water conservation, biomass and stand productivity, the multi-objective gray decision model The existing coniferous forest, broadleaf forest, coniferous and broadleaved mixed forest and shrubbery were optimized for space allocation in the reservoir area.The results showed that in 2007, the forest sites in the Three Gorges Reservoir Area can be divided into 40 types and the space configuration was optimized The area proportion of coniferous forest, broad-leaved forest, coniferous-broad-leaved mixed forest and shrub forest were 32.55%, 29.43%, 34.95% and 3.07% in the study area respectively.Compared with the pre-optimization coniferous and shrub The area proportion of deciduous forest and coniferous and broad-leaved forest increased by 10.23% and 27.11% respectively, and the overall water conservation ability, biomass and stand of the Three Gorges Reservoir Area were optimized by space optimization of shelterbelts Productivity increased by 14.09 × 108m3, 0.35 × 108t and 1.08 × 106t respectively.