韦伯-费希纳定律在湿地生态健康评价的应用

Application of Weber-Fechner Law in Assessment of the Ecosystem Health of Wetland

以海河流域河北衡水湖湿地为例,在应用"压力-状态-响应"(PSR)模型建立的湿地生态系统健康综合评价指标体系的基础上,根据韦伯-费希纳定律的基本原理,以湿地生态健康评价指标数值表示外界环境刺激量c,以各指标对湿地生态健康的危害程度表征人体产生的反应量k,各项指标的权重相当于韦伯常数α,以此构建湿地生态健康综合评价模型,并对其进行定量计算和分析评价.结果表明:衡水湖湿地生态系统处于不健康程度.该方法用于湿地生态系统健康评价,数学模型意义清晰,计算过程简便,结果准确,在客观评价了湿地生态系统综合健康状况的同时,还能直观反映出各单项评价指标的健康指数,为湿地的科学管理和保护提供重要的基础依据.

A comprehensive model of pressure-state-response （PSR） has been used as the assessment index system to evaluate the eco-health extent of Hengshui Lake wetland in Hebei Province. Weber-Fechner （W-F） Law was applied in assessment eco-heahh of wetland, and value of wetland ecosystem health index, effect of ecosystem health index to wetland, the weight of index were taken as the intensity of the stimulus （c） , the value （k） of human caused by environment represents and Weber constants （α） respectively. The evaluation revealed that ecosystem of Hengshui Lake Wetland is in an unhealthy state. The W-F model was simple calculation, objective description and comprehensive reflection of the sample position. The result was more completely reasonable in needs of the wetland ecological environmental protection objectives.