The purpose of this project (I) to establish the background data file for the 10 major eutrophic reservoir in Taiwan area, that contents include: characteristics of reservoir, river system of reservoir basin, nutrient loading from reservoir basin, method for nutrients (N, P)control, the subjection for individual eutrophic reservoir for the ecotechnology maitance cost, operation condition, the relationship between land use and reservoir eutrophication, or on engineering for nutrients control; and 5-year nutrient loading change. (II)Collection 10 year duration papers and in formations from Japan and U.S.A. about nutrients control methods (BMPs, ecotechnology). And giving the subjection for: on sit practical technology; cases analysis of ecotechnology for nutrients control for reservoir watershed, classification for engineering methodology, reaction mechanism, operation condition, maintenance cost; nutrients control strategies for reservoir watershed. In order to meet the purpose of this study, 10 series conferences that invading academicians, regulatory officials, manager of reservoir, experts, were meted. We were focused on discussing practical of the ecotechnology that would be useful to the nutrients control for reservoir watershed.

Eutrophication,ecological engineering method,watershed