皖南山区山地生态系统经济价值损失估算方法

Estimation Methods of the Economical Loss of Ecological Destruction in Mountainous Regions of South Anhui

生态系统是由多种成分组成的复杂系统,对生态系统破坏造成的损失首先会直接影响到森林资源、水资源、土地资源、草场资源等。为估算某一地区生态系统经济损失,可采用将损失转化为货币值的方法,损失函数P(A),P(A)=∑P(UAi)=P(Ai),Ai(i=1,2,3,……)为各单项损失值。用此方法估算出皖南山区2000年生态系统经济损失值达27309 32万元,占当年农业总产值的4 42%,森林资源损失为17679 44万元,水资源损失7596 66万元,土地资源损失6094 49万元,草场资源损失3120 58万元。所采用的方法科学,经验证表明估算值基本正确,但比实际值偏小。

Ecosystem is a complex system consisting of diversiform kinds of elements.The economical loss caused by ecosystem destruction could directly affect forest resource, water resource, soil resource, grass resources,etc. We can turn the loss in to currency value ,namely,define a function P(A)= P(∪Ai)= ∑P(Ai) ,Ai(i=1,2,3,……) is the loss value for each item. Acording to the method,it is estimated that the loss of ecosystem,forest resource,water resource,and grass resource is 273 093 200 yuan,176 794 400 yuan,75 966 600 yuan,(60 944 900) yuan and 31 205 800 yuan, respectively in mountainous regions in the south of Anhui in 2000,and the ecosystem economical loss takes up 4.42 percent of total agriculture production value in the same year.The method used in this paper is scientific but not completely exact,the estimation value is less than the reality.