IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
Alternative TitleVertical Differentiation of Vegetation in Xiaojiang River Basin, Yunnan and Vegetive Measures of Cntroling Debris Flows
Publication Place重庆
Keyword植被垂直分异 生物治理 泥石流防治 小江流域 云南
AbstractThe Xiaojiang River basin in Yunnan Province is one of the regions where debris flows are the most typical in development and most harmful in China. The vegetation types of this locality belong to xerophytic subtropical broadleaf and needleaf evergreen forests of Western China. The basin is characterized by its great diff H and distinct vertical differentiation of vegetation. The execution of vegetative measures against debris flows must be based on these characteristics. Below 1600m above sea level lies the valley of Xiaojiang River with a dry and lot climate, where the vegetal cover is subtropical savanna scrub. Drytolerant and hottolernt trees and shrubs are chosen to make farmland-protecting plantations on the deposition fan of debris flow. On the seriously croded hillsides and foothills along the valley, drougth-enduring shrubs and low arbores are suitable for the water-conservation shrub forest. The low and middle mountains, between 1600 and 3000m above sea level, with a semihumid climate are the main ormation zone of debris flow. The vegetation consists of Yunnan pine forest and oak forest. According to the various conditions of vertical zones, different kinds of forests can be planted for water conservation. The subalpine zone between 3000m and 3900m above sea level has a humid climate. The major vegetation is fir forest, which is available for the conservation of water source.
Other Abstract小江流域植被属于我国西部偏干性亚热带常绿阔叶林和针叶林。当地山地高差悬殊,植被具有垂直分异,从谷地到山巅可分为四个垂直植被带:1、稀树灌丛带;2、云南松林、栎林带;3、冷杉林带;4、高山灌丛草丛草甸带。将流域山地从下到上分为四个泥石流生物治理区:1、泥石流堆积扇-农田防护林区,地处海拔1600米以下。本区泥石流生物治理措施主要是发展农田防护林和固堤护路林。2、山麓、丘陵-水保灌木林区,包括海拔1600米以下河谷两侧的山麓、丘陵、陡坡和支沟、本区泥石流特别应采取植物与管护相结合的措施。3、中山-水保用材林区。本区位于海拔1600-2000米地带内,是泥石流生物治理的重点。4、高中山-水源涵养林区,海拔2600米以上。
Document Type专著章节文集论文
Recommended Citation
GB/T 7714
兰肇声. 云南小江流域的植被垂直分异与泥石流生物治理. 重庆:科学技术出版社重庆分社,1981:112-117.
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