What are some of the factors that affect the rate at which rocks abrade in running water?

The rate at which rocks abrade in running water is influenced by several factors, including the velocity of the water flow, the size and hardness of the rocks, and the presence of sediment and other materials in the water. Faster-flowing water can increase abrasion by carrying more particles that collide with rocks. Additionally, larger and harder rocks tend to resist abrasion more effectively, while softer or smaller rocks may wear away more quickly. The composition and concentration of sediments can also enhance or diminish the abrasion process.