抄録
The purpose of this study is to investigate the techniques for evaluating river environment. We selected the three techniques; (1) by dweller's evaluation, (2) by subject's evaluation at river areas, (3) by subject's evaluation with colour slides. The Part 1 of this study analysed dweller's evaluation at 21 districts around the Ota river in Hiroshima City. As the Part 2, this paper analyses the results of river evaluation with (2) and (3) techniques above-mentioned, and compares to the characteristics of the three techniques. The contents of this paper are as follows. We show the results of synthetical evaluation of river environment at 22 points around the Ota in Hiroshima City. Using the factor analysis, we select the 2 factors from conservative evaluation and 3 factors from imaginary evaluation as the common factor. These factors have the same meaning with the results of dweller's evaluation, But the numbers of selected factor are not the same. Using the multiple regression analysis, we show the relation between evaluation and indexes composing the river environment on each factor. We clarify that the selected explanatory variables in each regression equation have the different influence on the evaluation between these techniques, and describe that one of the reason of these differences depends on the degree of consciousness for environment around the river areas. From these results, we clarify that the technique by subject's evaluation with colour slides is restricted for evaluating river environment synthetically.
