图解黄河调水调沙“名场面”

Core Viewpoint - The Yellow River Xiaolangdi Water Conservancy Project has officially launched its water and sediment regulation for 2025, with an expected total sediment discharge exceeding 100 million tons during the operation period of approximately 17 days [2]. Group 1: Purpose of Water and Sediment Regulation - The water and sediment regulation aims to "create storage for flood prevention," reduce sediment accumulation in the reservoir, and maintain the flow capacity of downstream rivers. The Xiaolangdi project controls 91.2% of the Yellow River's runoff and nearly 100% of its sediment transport [3]. Group 2: Visitor Experience - During the water and sediment regulation period, the Xiaolangdi scenic area remains open to the public, allowing visitors to experience the impressive sight of the rushing water, which resembles a waterfall [4]. Group 3: Water-Sediment Relationship - The term "regulation" in the context of water and sediment management refers to adjusting the water-sediment relationship to enhance the flood discharge capacity of the river [5]. Group 4: Impact on Power Generation - When the sediment concentration in the water reaches a certain level, the power generation units will shut down to avoid damage. The Xiaolangdi power station has an average annual output of 5.8 billion kilowatt-hours, playing a crucial role in peak regulation within the Henan power grid [6]. Group 5: Impact on Aquatic Life - To mitigate the impact of high-sediment water on fish, clear water is released from three upstream reservoirs to dilute the sediment concentration. Additionally, special fishing operations have been conducted in advance, and fish stocking activities are ongoing to support aquatic life [7]. Group 6: Downstream Sediment Accumulation - Research indicates that maintaining a discharge flow of 2,600 cubic meters per second for over six days will effectively flush sediment from the downstream river into the sea. The regulation process consists of two phases: first, a large volume of clear water is released, followed by sediment discharge [8]. Group 7: Xiaolangdi Water Conservancy Project Overview - The Xiaolangdi Water Conservancy Project is a key engineering project for the management and development of the Yellow River, controlling a drainage area of 694,000 square kilometers, which is 92.3% of the total basin area. The project has a total designed capacity of 12.65 billion cubic meters and aims to provide flood control, sediment reduction, water supply, irrigation, and power generation [9].