An Analysis on Social Benefit Derived by Introducing New Technology and Optimal Environmental Policy: Case Study in Lake Kasumigaura

  • Takeshi MizunoyaEmail author
Part of the New Frontiers in Regional Science: Asian Perspectives book series (NFRSASIPER, volume 24)


In this study, we evaluate social benefit derived by introducing new technologies and analyze a dynamic optimal policy to improve the water quality of Lake Kasumigaura, considering both – the total ecological system in and around the lake and the situational changes over a certain period of time. We specify three sub-models (socio-economic model, material flow balance model and water cycle model) and one objective function in order to analyze the optimal policy to improve the water quality of Lake Kasumigaura. The pollutants measured in this study are nitrogen (T-N), phosphorus (T-P) and COD. These have been strongly affecting the deterioration of water quality. We found the social benefit of new technology is 1.4 trillion yen when the water pollutants reduction rate is 33 % and the social benefit rate is around 33. This means efficiency of the new technologies adopted is very high. The simulation shows that the present technology has an inadequate abatement capability for T-N as compared with other pollutants. Also it shows that we should consider the reduction of T-N as the most important subject when we formulate an environmental policy or develop new technology to improve the water quality. Excessively accumulated nitrogen gives load in environment in a circulation process. The environmental policy should be drafted associated with food self-sufficiency problem.


New technology Social benefit Environmental policy Environmental quality Simulation 


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Copyright information

© Springer Science+Business Media Singapore 2017

Authors and Affiliations

  1. 1.University of TsukubaTsukubaJapan

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