辽宁省东部山区5种森林植被类型水文生态效益综合评判

利用层次分析与Fuzzy数学相结合方法,对辽宁省东部山区5种森林植被类型水源涵养能力进行了多目标综合评判。首先利用层次分析法确定了评价因子林冠截留、林冠蒸散、枯落物蓄水、土壤容重、非毛管孔隙度、初渗速率、稳渗速率、土壤总蓄水和土壤有效水的权重集为C=(0.0245,0.0051,0.1993,0.0109,0.0762,0.0565,0.2827,0.0573,0.2866),然后利用最大模糊熵原则确定了评价因子的隶属函数,最后利用Fuzzy综合评判得出油松、落叶松、红松、柞木林、杂木林评价结果模糊子集为B=(0.4686,0.3784,0.4145,0.6128,0.4808),结果表明阔叶林水源涵养效益高于针叶林,其中柞木林效益最佳。

Multi-objective decision-making on hydro-ecological eficiencies for five fordst vegetation types in east Liaoning mountainous region

With the method of analytical hierarchical process (AHP) combined with fuzzy mathematics,multi-objective decision-making method on water-stored capacities for five typical forest vegetations in east Liaoning mountainous region has been made on the base of some hydro-ecological indices measured.By means of AHP,the weight set,C-(0.0245,0.0051,0.1993,0.0109,0.0762,0.0565,0.2827,0.0573,0.2866) is firstly determined for such evaluation factors as canopy interception,canopy evapotranspiration,litter water storage,soil bulk density,noncapillary porosity,initial infiltration rate,final infiltration rate,total soil water storage,available soil water storage,then the fuzzy functions are established for these factors according to the principle of maximum fuzzy entropy,and finally,using the fuzzy multi-objective decision-making method,the fuzzy subset of evaluation results,B = (0.4686,0.3784,0.4145,0.6128,0.4808) is evolved for the Chinese pine,larch,the korean pine,oak,weed trees,showing that the hardwoods enjoy higher water stored capacity than conifers,and the oak forests show the best.