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作 者 ：李崇巍,刘世荣,孙鹏森,葛剑平

期 刊 ：生态学报 2005年 25卷 4期 页码：691~698

关键词：岷江上游；景观格局；保水指数；降雨；径流；

Keywords:precipitation, runoff, landscape pattern, eco-hydrological index,

摘 要 ：基于1994年岷江上游TM遥感影像分类,结合6个不同集水区1992、1993、1995年植被生长季降雨、径流及同期NOAA/AVHRR的N DVI数据,构建了植被保水指数作为表征植被生态水文功能分析的指标。并用此对岷江上游6个不同集水区景观格局与生态水文特征进行分析。结果表明:不同集水区植被组成及景观结构有显著差异;不同集水区植被保蓄降雨能力即保水指数有明显差异;不同集水区景观结构指数与保水指数之间具有很高相关性,其中边界密度、多样性指数与保水指数呈负相关,聚集度指数与保水指数呈正相关。保水指数的构建对植被建设具有一定的科学意义。

Abstract:The relationships among vegetation, precipitation and runoff are important issues in eco-hydrological study. There have been a lot of researches working on eco-hydrological function of forest at small scale of a catchments or an ecosystem, while less effort is made at large scale of a landscape or watershed. At the same time, there are few studies addressing the relationship between landscape indices and ecological functions, which indicates potential interaction of landscape patterns and landscape process...

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