This study is aimed at the development of the adequate sediment yield formulas in Wi-Stream basin ; IHP representative basin in Korea. As a result of applying outstanding sediment yield formulas among the existing formulas. It is analyzed that including the Engelund & Hansen formula, Yang formula is proper to the Wi-Stream basin. And as a result of sensitivity analysis to the sediment parameters it is analyzed that Rijn and Ackers & White formula is more sensible than any other formulas which has been applied the velocity and depth among the parameters. Also, Engelund & Hansen and Yang formula is less sensible than any other formulas.
In Wi-Stream basin, it is analyzed that Yang and Engelund & Hansen formula is the most suitable sediment yield formula in this study. But because the existing formulas had been developed in foreign countries and applied the foreign natural rivers and reservoirs, it makes careful use of Korean alluvial river and hoped that it will be developed the most adequate formula in Wi-Stream basin.

• 김성원(영남대학교 토목공학과) | Sung-Won Kim (Dept. of Civil Engineering, Yeungnam Univ.)
• 고병련(제주산업정보대학 토목과) | Byoung-Ryoun Koh (Dept. of Civil Engineering, Cheju College of Technology)
• 조정석(대구대학교 토목공학과) | Chung-Seok Cho (Dept. of Civil Engineering, Taegu University)