层次分析法在小流域规划中的应用

Application of level analysis in the planning of comprehensive harness for small watershed

层次分析法,是现代最新的系统分析诊断方法,也是一种定量和定性相结合的分析方法。我们在进行北河小流域系统分析时,将众多的因素聚类组合,建立了层次分析模型。根据层次分析结果表明,九种主要因素对北河小流域环境恶化、水土流失严重和经济贫困的影响程度:土地利用状况>土壤结构>气候条件>植被状况>动物资源>劳力资源>文化教育>地貌类型>地质构造。因此,在制定综合治理规划时,应首先调整农林牧副业占地比例,改善土壤结构,提高土地生产力;其次是兴建水利设施,加快绿化步伐,增加大地植被。

The level analysis is the modern and new method to analyse and dia- gnose a system,which is a combination of qualification with quantifi- cation.When analysing Beihe small watershed systematically we cluster and group all the factors and establish models of level analysis.The ana- lysing results show that the effecting extent of nine factors to environ- ment worsenning of the watershed,soil and water loss and poorness of economy could be lined as,condition of land utilization>soil texture> climatic condition>vegetation condition>animal resource>resoure of labour power>culture and education>geomorphorlogical type>geological tectonic.Thus,it is suggested,firstly,to adjust the proporiton of lands for farming,forestry,husbandry and sideline production,to improve soil structure and raise land productivity,meanwhile,to construct ins- tallations of water conservancy,to accelarate greening and to enlarge vegetation when drawing up harnessing plan.