European Regional Science Association
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European Regional Science Association
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The abstract for paper number 458:
Takeshi Mizunoya, Katsuhiro Sakurai, University of Tsukuba, Tsukuba, Japan, Riki Morioka, The Science and Technology Promotion Foundation of Ibaraki, Ibaraki, Japan, Yoshiro Higano, University of Tsukuba, Tsukuba, Japan
A Study on Dynamic Optimal Water Purification Policies Related to the Introduction of New Technologies : A Case of Lake Kasumigaura
In this study, we analyze dynamic optimal policies and evaluate new technologies to improve the water quality of Lake Kasumigaura by computer simulation, considering both - the total ecological system in and around the lake and the socio-economic situational changes over a certain period of time. The pollutants measured in this study are nitrogen, phosphorus and COD. We specify three sub-models (the ecosystem model, the water cycle model and the socio-economic model) and one objective function (Regional GDP; GRP). The optimal policies are derived so as to maximize the objective function subject to its structural equations. As a result of the simulation, we found that the maximum tolerable reduction level of water pollutants of the catchment area in 2003 was 37% as compared to the amount of water pollutants inflow in 1999. We also found that the introduction of new technology is more effective to reduce water pollutants which flow into Kasumigaura as the rate of reduction is higher when the new technology was applied.
Unfortunately full paper has not been submitted.