绿色通道建设是中国国土绿化的重要组成部分,主要任务是对公路、铁路、河渠、堤坝沿线进行绿化美化。通道绿化是重要的生态建设工程,是推进城乡环境整治、统筹城乡经济社会发展、实施可持续发展战略的重大举措,是塑造地方形象的"窗口工程"和"形象工程"。湖北省是中部崛起的战略支点,通道绿化任务十分艰巨[1]。红安县绿色通道建设模式具有一定特色与示范效应,为推动通道绿化健康快速发展,现对红安县绿色通道建设现状,创新推进全省绿色通道建设进行调研与分析。

Through the establishment of forest vegetation cover index model,forest and lawn flow analysis model,forest vegetation center of gravity migration model,the temporal and spatial variation of forest vegetation in quantities,inner structure,types and spatial distribution features of the dynamic changes,were studied in detail over a ten-year period.The conclusions were:no significant changes were observed for the vegetation under inverstigation,changes were mainly concentrated in Northwest,especially in Xingshan county.Less change were observed in the east of Yiling district;the area of forest land decreased by 1 689 hm2,which mainly changed into grassland 574 hm2;the area of grassland was decreased by 1 024 hm2,which transformed into arable land 2 108 hm2;the center of gravity of forest land was migrated to the north-western by 4.6 km,arable land was migrated to the eastern by 5.2 km,grassland was migrated to the east by 3.2 km.

为了科学地进行鄂西三峡库区森林资源生态效益的监测、合理评价及健康经营,对鄂西三峡库区森林资源面积、蓄积量、组成结构等进行了动态分析与评价.研究表明:20世纪60年代中期至80年代中期,该区域林业用地面积和蓄积均呈下降趋势;其后,由于实施一系列林业生态保护与可持续发展工程,保护和发展森林资源,鄂西三峡库区森林面积、蓄积量和覆盖率有很大的提高,林地面积年均增长率为1.12%,防护林、经济林、特用林面积年均增长率分别为3.87%、10%、8.40%,用材林面积净减率为1.43%,林种结构逐步趋向合理,为三峡库区生态环境安全的构建发挥了积极的作用.

By processing and analizing the remote sensing interpretation data and the forest inventory data of the Three Gorges reservoir area in western Hubei in 1999 by ArcGIS,the forest resources distribution map,age structure map,a series of forest canopy density distribution landscape map were extracted to study forest resources structures,such as the tree types structure,the diameter level structure,the age of forest structure and the forest plants spatial distribution and so on.The structures provided the visualization foundation in this region.The forest resources spatial structure research,to display forest function and to manage the forest resources.Analysis data show that: ① There are multiple types of forest resources and more endemic plants,the coverage rate is relatively high(46.8%).②The geographical distribution of the forest is quite uneven,mainly in the mountains.③ The zonal evergreen broad-leaved forests have been seriously damaged,and the forests have obvious secondary features,with shrubbery and coniferous forest accounting for the greatest proportion of the forest.④ Forests structure is not very reasonable,the area of the timber-forest is much larger than that of shelter-forest and economic forest,whether the forest area or the reserves, the nearly mature forest or too mature forest shares a smaller proportion.⑤ As for the age structure,young-and-middle age forests account for greater proportion than near-and-over matured forest.⑥The forest cover protection function of the ecological environment in the Three Gorges reservoir area is not playing well.

For scientifically monitoring the ecology benefit of forest resources,reasonably evaluating and managing forest resources in Hubei Province,according to Chinese Natural Resources Database and forest data collected by the Institute of Forestry Survey and Design of Hubei Province,this paper provided detailed information about 34 years dynamic changes of forest resources and concisely explained the factors resulting these changes from the area of forest resources,the amount of growing stock,the structure and other aspects.The results showed that Hubei's forest resources decreased rapidly from the mid-1960's to mid-1980's,but since 1985,they have steadily increased. Hubei Provincial government and forestry departments have attached great importance to the implementation of a se- ries of forestry,ecological protection and sustainable development projects,such as theDecade Green Hubei pro- ject,Yangtse protection forest project,Plain greening project.In this way,Hubei forest resources sustained and grew stably,and promoted the ecological safety.

通过对退耕还林工程县(区)的现场调研,充分肯定了湖北省退耕还林工作,同时对退耕还林工程中"年度计划"、"生态林比例"、"项目管理费"、"幼林抚育和退耕地套种"及"生态移民"等问题进行了初步研究.