成本效益分析模型

成本效益分析模型

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Initial contribute: 2018-12-04

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岳天祥编著
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yue@lreis.ac.cn
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成本效益分析模型

 

(1) 一项工程的当前价值等于用以时间为指数的函数模型加权而得到的净期望收入,这些收入可用该模型得到:

式中,P(t)是在时间t时的净收入;α时贴现率;T时时间范围。

(2) 整个工程从屏蔽带开始至当前时间的总费用的当前价值等于:

式中,C(v)L(x(t))是在时间t时整个屏障地带的费用;x是指距离,其变幅为0L(x)种群向前传播的距离长度;v(t)传播速度。

(3) 从有害物种传播速度的减缓中受益的当前价值时:

式中,D是指单位面积单位时间内害虫引起的平均损害;S是指未控制传播区与实际传播区之间的面积。

(4) 总的净收益的当前值:

参考文献

Sharov AALiebhold AM:用屏障地带来控制外来有害物种传播的生物经济学。Ecological Applications1998,8(3)

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《资源环境数学模型手册》 (2018). 成本效益分析模型, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/d7088928-fb20-4dc3-87ab-0d666496b9d4
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Initial contribute : 2018-12-04

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:  
岳天祥编著
:  
yue@lreis.ac.cn
:  
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