The jia county Municipal Government believes that the primary functions of the nanxi river Water Control Project are flood control and water supply, which is the fundamental way to solve the problems of survival and development of Yongjia County and Yueqing Liu Hong Plain along the Yangtze River. First of all, there are frequent floods in nanxi river Basin. Since the founding of the People's Republic of China, there have been 23 major floods in this basin, resulting in heavy losses. Therefore, it is urgent to build a controlled water conservancy project in the upper reaches. Secondly, Yongjia County is the political, economic and cultural center along the Yangtze River, with the total output value of population, industry and agriculture accounting for 1/4 and 2/3 of the county respectively. However, due to the limitation of natural conditions, Yongjia County is short of fresh water resources and cannot be self-sufficient. 1997 nanxi river water diversion project was completed, which solved the water shortage problem in the above areas and provided fresh water for Wenzhou power plant. Because there is no special reservoir upstream and no sluice downstream of the water intake, the water supply in dry season can only meet 654.38+10,000 cubic meters. 200 1 daily average water supply is 70,000 cubic meters. If the average annual growth rate is 10%, it will exceed 654.38+10,000 cubic meters in 2005, and it is urgent to build a special water supply reservoir. In addition, the Hongqiao-Liushi Plain in Yueqing City is densely populated and economically developed, but the serious lack of water resources has become the main factor restricting economic and social development. Especially in Liushi area, the water demand in 2004 can only be basically met on the premise of fully tapping the potential of this basin. If the Baojiang Reservoir with an adjustable storage capacity of 507 million cubic meters is built, it will not only meet the long-term production and domestic water demand of Yongjia County and Wenzhou Power Plant, but also completely solve the water shortage problem of Liu Hong Plain in Yueqing City. Third, under the premise of flood control and water supply, combined with power generation. The installed capacity of the hydropower station is 64,000 kilowatts, and the average power generation for many years is 65.438+0.27 billion kW h. Because of the strong regulation capacity of the reservoir, it can undertake the task of peak regulation and emergency standby of Wenzhou power grid system. Fourthly, it is beneficial to the improvement of water environment in nanxi river. According to the statistics of the measured data of hydrological stations, the difference of flood and dry flow in nanxi river is more than 6000 times, and both dry season and wet season affect the sightseeing effect of nanxi river. Because the water in the reservoir flows to the head of the water diversion project through nanxi river, and then transported to Yueqing. Due to the regulation of the reservoir, the difference between flood and dry runoff in nanxi river is reduced, and the water level is basically balanced, so that the flood is not flooded and the dry water is not obvious. At the same time, it can meet the requirements of pollution washing and self-purification in dry season in nanxi river. Fifth, expand the scope of scenic spots. The reservoir forms a water surface of 6,543,800+0.54 million square meters, just like the high gorge and Pinghu, in which islands are located, forming a new scenic spot with high ornamental, holiday, leisure and summer resort. In addition, the majestic dam with a height of more than 100 meters is also a rare landscape. Sixth, it is conducive to poverty alleviation in different places and promoting urbanization. Immigrants in the reservoir area are mainly placed in economically developed areas such as Yongjia County along the Yangtze River and Yueqing City Plain, which can not only make immigrants rich, but also promote the urbanization construction of Yongjia County and Yueqing City. At the same time, immigration can reduce pollution sources, which is beneficial to the improvement of water resources and ecological environment in nanxi river.

To sum up, it is necessary and feasible to build nanxi river Water Control Project, which has obvious social, economic and ecological benefits.