Water Quality Comparison of the Donau, Based on OECD Reports

Junko KAMBEa,b, Umpei NAGASHIMAb,c*, Aiko YAMAUCHId and Tomoo AOYAMAe

aFaculty of Foreign Language, Daito Bunka University
1-9-1 Takashimadaira, Itabashi, Tokyo 175-8571, Japan
bCore Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST)
Kawaguchi Center Building,4-1-8, Honcho, Kawaguchi, Saitama 332-0012 Japan
cResearch Institute for Computational Science, National Institute for Advanced Industrial Science and Technology
1-1-1 Umezono, Tsukuba, Ibaraki 305-8565 Japan
dGraduate School of Pharmaceutical Sciences
University of Tokushima, 1-78 Sho-machi, Tokushima 770-8505, Japan
eFaculty of Engineering, University of Miyazaki
Gakuenkihanadai Nishi, Miyazaki 889-2192 Japan

(Received: November 9, 2006; Accepted for publication: December 14, 2006; Published on Web: March 2, 2007)

We researched the water quality of the Donau based on OECD reports. Observations in the reports have defects that make evaluation of environmental situations difficult. By using interpolations in the compensation quantitative structure-activity relationships (CQSAR), we complement the defects in the water quality of the rivers. Thus, we get a complete data set for dissolved oxygen, biochemical oxygen demand, and total phosphorus. Using the data set, we examine re-naturalization of the Donau. We investigate the effect of dams between Slovakia and Hungary, by using reconstructions of neural networks in CQSAR.
The water quality of the Donau has been improved as to DO and BOD. The rivers have been re-naturalized. We believe that the effect is found in these indexes; however, not so much for the T-P.
We find a negative effect of the dam construction on changes of DO in the Hungary Donau.

Keywords: Water quality, Donau, Re-naturalization, Compensation Quantitative Structure-Activity Relationship (CQSAR)

Abstract in Japanese

Text in Japanese

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