生态河岸带功能区划的定性与定量研究

生态河岸带功能区划是河流功能区划的重要组成部分,合理的功能区划有利于保护河岸带、河流以及整个流域的生态,有利于生态河岸带资源的合理开发利用,使其发挥最佳的效率,同时生态河岸带的功能区划也是生态河岸带管理的基础。生态河岸带是一个特殊区划,它包括很多类型的功能区。在纵向上,生态河岸带可以划分为近岸水域、河滨区域、近岸陆域等3个一级功能区;在横向上,它又可分为自然保护区、治理保护区、资源开发利用区以及特定功能区等4个一级功能区。为了较为精确地划分各功能区,必须对其进行定量区划。主要采用聚类分析法,先后经过确定分区指标、数据的标准化、确定分区指标权重系数、计算相似系数、构造谱系图等步骤,最终形成较为精确、合理的功能区划。

Qualitative and quantitative function regionalization of ecological riparian zone

Function regionalization of ecological riparian zone is part of river function regionalization.Reasonable function regionalization is very good for conservation and preservation of riparian zone ecology so that the resources in ecological riparian zone are sustainable utilized and managed.Ecological riparian zone is very special,which includes many function regions.In latitudinal direction,there are three first-order regions: near bank water region,streamside region and upland region.In longitudinal direction,there are four first-order regions: natural reserve region,control management region,development region and special function region.These regions is qualitatively defined and very fuzzy.In order to accurately regionalize,quantitative methods such as cluster analysis should be applied.After reasonable indices are assured,the steps of data standardization,giving weight coefficient s,similarity coefficients calculation and dendrogram formed should be done.According to dendrogram,the reasonable function regionalization should be presented.