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Generally, a watershed has a "nested" structure that encompasses the human activities that develop within it. We focused particularly on ways of viewing the problems occurring in the watershed at each level, because differing views can cause conflicts of interest between levels and thus obstruct watershed management. In other words, the reason why watershed management is not working well is that active communication aimed at balancing competing interests is blocked, leaving a variety of stakeholders dispersed over the different levels. We proposed a hierarchical watershed management system incorporating adaptive management, because we believe that governance by a variety of stakeholders on the basis of adaptive management at each spatial level is needed to achieve effective management of the watershed as a commons. 1) We test the possibility of adaptive management by stakeholders with our aid of monitoring and developing diagnosis indicators at each scale, and 2) develop a methodology for sharing what the main subject is on watershed management between scales. In light of this background, we show the outline of our watershed management project at RIHN which focuses on the turbid water problem discharged from rice paddy fields flowing into Lake Biwa in the Lake Biwa-Yodo River watershed.
社団法人環境科学会の論文