An Approach for Analysis and Assessment of the Pollution Indices of the Struma River in the Bulgarian Section

M. Petrov
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Abstract

Abstract In this work, 13 pollution indices in 10 stations of the Struma river in the Bulgarian section are investigated: temperature (T°C), pH, dissolved oxygen (DO), oxygen saturation (SO2), electrical conductivity (EC), biological oxygen demand (BOD), permanganate oxidation (KMn3O4), ammonia nitrogen (NH3-N), nitrite nitrogen (NO2-N), nitrate nitrogen (NO3-N), orthophosphates (PO4), dissolved substances (DS), and unsolved substances (US). The analysis and assessment of the studied indices of pollution of the Struma river in the Bulgarian section is carried out by means of a recently proposed multi-criteria decision-making method called intercriteria decision analysis (ICDA). Application of ICDA showed that we have a degree of agreement for T°C for all stations with very few exceptions. This also applies to DO, KMn3O4, SO2 and EC. We had a degree of disagreement for all other indices. From the conducted research, it can be concluded that for all indicators, it is necessary to develop mathematical models in the studied stations according to the studied indicators of the Struma river in Bulgaria. The application of ICDA allows us to examine the correlations between individual indicators and eliminate those that are highly dependent on each other.
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分析和评估斯特鲁马河保加利亚段污染指数的方法
摘要 本研究调查了斯特鲁马河保加利亚段 10 个站点的 13 项污染指数:温度 (T°C)、pH 值、溶解氧 (DO)、氧饱和度 (SO2)、电导率 (EC)、生物需氧量 (BOD)、高锰酸盐氧化物 (KMn3O4)、氨氮 (NH3-N)、亚硝酸盐氮 (NO2-N)、硝酸盐氮 (NO3-N)、正磷酸盐 (PO4)、溶解物质 (DS) 和未溶解物质 (US)。对所研究的斯特鲁马河保加利亚段污染指数的分析和评估是通过最近提出的一种名为 "标准间决策分析(ICDA)"的多标准决策方法进行的。ICDA 的应用表明,除极少数例外情况外,我们对所有站点的 T°C 都有一定程度的共识。这也适用于溶解氧、KMn3O4、二氧化硫和 EC。所有其他指数都存在一定程度的分歧。通过研究可以得出结论,对于所有指标,有必要根据保加利亚斯特鲁马河的研究指标,在所研究的站点建立数学模型。ICDA 的应用使我们能够检查各个指标之间的相关性,并消除那些相互依赖性很强的指标。
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