An Aquatic Environment Assessment Model for the Comprehensive Assessment of Environmental Measures in Metropolitan Areas

We have developed simulation models that describe the effects that urban environmental measures have on urban activities such as transportation and land use, and evaluate them from the perspective of the environment, quality of life, and the economy. This paper presents an aquatic environment assessment model that may be added to the above-mentioned simulation models, and presents the results of a case-study of the Sendai metropolitan area. The results confirmed that the aquatic environment assessment model is reproducible, with sufficient accuracy in assessing the aquatic environment. The case-study assessed the impact that land use measures, sewer planning, and water quality planning had on the environment, and made clear their effect on watershed retention capacity and the water quality improvement index.