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Vegetation water conservation effect in the Jinghe River basin:An analysis based on topography and soil type
Authors
毕晓丽
葛剑平
Publication date
31 December 2008
Publisher
Abstract
植被保水效益是黄土高原地区研究的热点,以往的研究往往将环境因子的异质性忽略,在环境均质的假设下进行小尺度的试验研究。本文基于GIS技术,综合考虑土壤、地形等因子,分析了黄土高原泾河流域的植被保水效益及空间分布特征。结果表明:泾河流域植被平均每年可以保持的水量是3.92×108m3,占泾河流域把口站的流量的1/3;总的保水量大小为草地>农田>森林>灌丛,不同植被类型平均保水效益为农田>森林>灌丛>草地,与前人研究结果不同的是,本文的研究是基于栅格单位的(30m),而前人则是基于点数据的;土壤类型在决定植被保水效益中起重要的作用,本文更客观地反映了流域内植被保水能力及空间分布
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Last time updated on 18/09/2018