练湖又称练塘,位于今丹阳城西北。从西晋末圈筑成湖。历史上它对太湖地区的农业开发和补给江南运河北段水源有所贡献。由于湖底淤积,湖地垦种,湖面缩小,影响水量贮蓄,垦田和复湖之争,延续不断。直到1971年,由于兴建了大量的水利工程,练湖原先的作用逐步减少,被建成为今丹阳练湖国营农场。 练湖北靠宁镇丘陵余脉,面傍今京杭运河徒阳段西岸。明丁一道在《练湖议》中载:“练湖创建之前,在开家一片土地上筑埂潴水,置立斗门、石(石达), Practicing Lake, also known as practice pond, located in the northwest today Danyang City. Built into the lake from the end of the Western Jin Dynasty. Historically, it has contributed to the agricultural development in the Taihu Lake region and the supply of water to the northern section of the Jiangnan Canal. As the lake sedimentation, reclamation of the lake, the lake shrinks, affecting the amount of water savings, reclamation and Lake Complex dispute continues. Until 1971, due to the construction of a large number of water conservancy projects, the original role of practicing the lake was gradually reduced and was built as a current state-run Danyang Lake training farm. Practice in Hubei by Ningzhen hills Yumai, near the surface of Beijing-Hangzhou Grand Canal West Bank. Ming Ding together in “practicing Lake Proposal” contains: "before the lake was built, in the opening of a piece of land to build water, build Doumen, stone (stone),