Impact of Sediment on Pump Operation Characteristics The Yellow River water contains more sediment, which has a greater impact on the characteristics of the centrifugal pump. Due to hydraulic and mechanical wear, the flow rate is reduced, the head is reduced, the efficiency is reduced, and the power of the corresponding pump is increased. The characteristic curve changes are also different. For the 6Sh -9A water pump, the sand content is different, and the resulting flow, head, and power are also different. The performance curve after the influence of sedimentation shows that the greater the sediment content, the lower the efficiency of the pump, the smaller the flow rate, the corresponding reduction in head, and the corresponding increase in power. The wear and tear of the water pump by the sediment can be divided into three types: corrosion, cavitation and abrasion. Abrasion is caused by the friction and collision of hard solid particles in the water with the surface of the flow parts, which is a mechanical damage. Because the Yellow River water contains a large amount of sediment, it will cause serious wear on the pump. Generally speaking, the cause of wear is: the erosion force generated by the high-speed sandy water flow. When the sand with a certain particle size and hardness passes through the water pump at high speed, it will generate considerable abrasive force, which will peel off the fine particles on the metal surface layer by layer and cause surface damage. Therefore, high speed is the main cause of wear of the water pump. The high-speed sand-bearing water flow forms vortices and bends on the uneven surface of the metal, and the sand particles form repeated impacts on the surface to destroy the wall.