(2 people 8? Yiyang) Read the following materials and briefly answer the questions: Material 1: Dongting Lake is located in northern Hunan and is the second largest freshwater lake in other countries

(2 people 8? Yiyang) Read the following materials and briefly answer the questions: Material 1: Dongting Lake is located in northern Hunan and is the second largest freshwater lake in other countries. old days

Analysis of the materials shows that (1) Dongting Lake is located in the middle reaches of the Yangtze River and plays a right-regulating role in the flow of the Yangtze River. (1) In recent years, the area of ??Dongting Lake has been shrinking, mainly due to sedimentation and land reclamation around the lake. (3) In recent years, in order to improve the flood control capacity of the Dongting Lake area, the state has taken measures to manage the Dongting Lake area: returning farmland to the lake, and relocating immigrants to build towns. (1) The favorable conditions for the construction of "Changzhutan Economic Integration" are: the three cities are relatively close to each other. According to the meaning of the question.

So the answer is: (1) midstream; regulation; (1) siltation, reclaiming land from lakes; (3) returning land to lakes, immigrants building towns; (1) the three 6 cities are relatively close to each other ．