Abstract
An approach to facilitate environmental and technical communication in local community for environmental problem solutions was discussed. A comprehensible methodology for understanding bottom mud improvement was introduced by applying an index sheet on the structural and physical elements of biotopes based on the works of Sugiyama(1995). After setting up three type instruments by combining different elements, field surveys were executed at Kikuta river and Edo river floodway in Chiba prefecture. Stability of replaced bottom material and upper water supply into bottom material were investigated. As a result, the introduced methodology helped benefitical and better understanding of various phenomena by bottom mud improvement.
