一、引言下三台水库始建于1975年11月,1981年10月下闸蓄水,1986年竣工,原是以防洪和菜田灌溉为主,结合发展养鱼等多年调节的中型水库。1982年大早,四平市区工业、生活用 I. Introduction Three reservoirs were built in November 1975 and the floodgates were closed in October 1981 and completed in 1986. They were originally flood-damped and irrigated vegetable fields, combined with the development of medium-sized reservoirs that have been adjusted for many years such as fish farming. Early in 1982, Siping urban industrial and domestic use