摘要
云南省防护林工程区地处伊洛瓦底江、怒江、澜沧江、红河、珠江五大流域上、中游,为了揭示地域上的相似性与差异性,分析其林业生态建设条件的异同,进行了该五大河流流域生态类型区划分。区划指标选择"土壤侵蚀量"、"坡度级"等若干直接因子以及"输沙模数"等若干间接因子,区划方法为非严格系统聚类方法,对流域项目区划分为三个生态环境等级类型区。并进行了生态重要性等级划分。
Protection Forest Engineering Areas of Yunnan province are located in up and middle reaches of five big watersheds, namely Yirouwadi River, Nujiang River, Lancangjiang River, Honghe River and Zhujiang River. To identify the regional similarity and difference, and to analyze the common & different condition for forest ecological construction, the zones for ecological type of these five big watersheds are classified. Direct factors for division such as the amount of soil erosion, class of gradient and so on, indirect factor and mathematics model of sediment discharge are chosen as division criteria. The division method adopted is non-strict systematic cluster analysis, three zones for ecological environment type and ecological significance rank have been divided in the project area.
出处
《林业调查规划》
2003年第4期6-10,共5页
Forest Inventory and Planning
关键词
云南
流域生态环境
生态类型
区域划分
防护林工程
zone for ecological environment type
zone for ecological significance rank
protection forest engineering area
five big watersheds