Abstract
An online questionnaire to the residents in the Tokyo metropolitan area was carried out in order to assess the residents' acceptability of introducing channels by using treated wastewater for improving the amenity performance in urban area and their preferences of the bank shapes. The 95.8% of residents approve the scenario, it indicates that residents highly value the introduction of channels and treated wastewater has the potential for this use. The order of residents' preference of the bank shape was observed as followed: (1) good vegetation and good accessibility (35.1%), (2) no vegetation and good accessibility (28.5%), (3) good vegetation and no accessibility] (21.5%), (4) no vegetation and no accessibility] (10.8%). This order shows no significant correlation with regional environmental conditions but with the positivity of waterfront usages and valuations or concerns of environmental issues.
