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Methodological Limitations of Determining Global Pollution Index as a Tool for Environmental Impact Assessment and a Proposed Extension

机译：将全球污染指数确定为环境影响评估工具的方法局限性和建议的扩展

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摘要

In Global Estimation Methodology for the Ecosystem State, Rojanschi (1991) used the geometric correlation method to assess the impact of human activity on environment and derived an indicator termed as Global Pollution Index (Ipg). The index is capable of describing the real state of environment at a particular location in respect to the national or international standard. However the method is only applicable when at least three environmental components (such as water, air, soil) are considered. In 2005 Popa proposed Alternative geometric correlation method which is also applicable when minimum two environmental components are investigated. However Popa’s method suffers from the limitation of taking average of average values of investigated data and lack geometric figure which show the real status of all the corresponding environmental components. Hence in several cases (as shown in the current paper), the Popa’s pollution index gives misleading information. In this paper, limitations of both Rojanschi’s and Popa’s methods are discussed and to rectify their limitations, a new scheme termed as ‘Extended Rojanschi’s Method’ is proposed. The proposed method includes concentric/eccentric circle technique for one and two environmental components in addition to the basic Rojanschi’s method. Thus the new method is applicable to any number of environmental component from literally one to infinite. It also provides an option to calculate pollution index from actual investigated data instead of their average value (as in Rojanschi’s method) or average of average value (as in Popa’s method). In proposed method the geometric figures are also capable of representing real status of all the investigated environmental components in respect to their ideal state (which is impossible in Popa’s method) and pollution index can be calculated even from one or two environmental component (which is impossible in original Rojanschi’s method).
机译：Rojanschi（1991）在《全球生态系统状态估算方法》中，使用几何相关方法评估了人类活动对环境的影响，并得出了一个称为全球污染指数的指标（I pg ）。该索引能够描述相对于国家或国际标准的特定位置的实际环境状况。但是，该方法仅在考虑至少三个环境成分（例如水，空气，土壤）时才适用。 2005年，Popa提出了替代几何相关方法，该方法也适用于研究最少两个环境成分的情况。然而，Popa的方法受到限制，无法取所调查数据的平均值的平均值，并且缺乏能显示所有相应环境组件真实状态的几何图形。因此，在某些情况下（如本白皮书所示），波帕的污染指数提供了令人误解的信息。在本文中，讨论了Rojanschi方法和Popa方法的局限性，并且为了纠正它们的局限性，提出了一种称为“扩展Rojanschi方法”的新方案。除了基本的Rojanschi方法外，该方法还包括针对一个和两个环境分量的同心/偏心圆技术。因此，该新方法适用于从字面上的一个到无限多个环境因素。它还提供了一种选项，可以根据实际调查数据而不是平均值（如Rojanschi方法）或平均值平均值（如Popa方法）来计算污染指数。在提出的方法中，几何图形还能够表示所有被调查环境成分相对于其理想状态的真实状态（这在Popa的方法中是不可能的），甚至可以从一个或两个环境成分计算污染指数（这是不可能的）用原始的Rojanschi方法）。

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