On March 29, 2023, the construction of the Sanba Reservoir Project in Chengdu, Sichuan Province officially started in Dayi County. This is another major water conservancy project started in Sichuan after the second-stage project of the first phase of the North Main Canal of the Xiangjiaba Irrigation District on March 1. The successive start of two major water conservancy projects has comprehensively accelerated the construction of Sichuan's backbone water network, helped to achieve a "good start" in the first quarter, and made every effort to "strive for the economy, engage in construction, and promote high-quality development."

The Sanba Reservoir is located on the Qijiang River, a tributary of the Nanhe River in the Minjiang River Basin. The dam site is located in Xinchang Town, Dayi County. The project tasks are mainly urban and rural water supply, flood control, and comprehensive utilization of irrigation and power generation. It is known as the "third place" of Chengdu. Water source" project.

It is understood that the Sanba Reservoir has been included in the national "14th Five-Year Plan" Water Security Guarantee Plan. It is one of the major national water conservancy projects that the Ministry of Water Resources will focus on promoting in 2023 and one of the six major water conservancy projects that Sichuan Province will focus on promoting.

The scale of the Sanba Reservoir project is a large (2) type reservoir. According to the approval of the National Development and Reform Commission on the feasibility study report, the normal storage level of the reservoir is 691 meters, the total storage capacity is 161 million cubic meters, and the total construction period is 54 months (excluding the construction period) ), the total project investment is 4.6234 billion yuan.

The relevant person in charge of the Sichuan Provincial Department of Water Resources said that after the completion of the Sanba Reservoir, the allocation of water resources can be further optimized to solve the problem of water shortage in the southeast concentrated area of Dayi County, Chengdu, and the need for irrigation water supply in the Qijiang River irrigation area. At the same time, the Sanba Reservoir will also undertake the task of supplying water to Tianfu New District in the future. After completion, it can supply 101 million cubic meters of water to Tianfu New District every year.

In addition, the construction of the Sanba Reservoir can also improve the downstream flood control capacity and improve the flood control system of the river basin. After the completion of the Sanba Reservoir, the flood control capacity of the reservoir can be used to reduce the flood peak, which can basically increase the flood control capacity of Qionglai City from once in 20 years to about once in 30 years.

The relevant person in charge of the Chengdu Municipal Water Affairs Bureau stated that after the completion of the Sanba Reservoir Project, together with the Dujiangyan Water Conservancy Project (Chengdu’s first water source) and Lijiayan Reservoir (Chengdu’s second water source), it will form three major water supply bases in Chengdu and gradually improve Chengdu. The status quo of regional water shortage, engineering water shortage, water quality water shortage and allocation water shortage will better help the construction of Chengdu Plain Economic Zone. It is reported that the dam of Lijiayan Reservoir has been filled to an elevation of 690 meters, with a total investment of 4.419 billion yuan, accounting for 91.9%.Editor/Ma Xue