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generally tends to increase downstream. Although there are many reaches in nearly all rivers where mean velocity decreases downstream, the general tendency for conservation or for downstream increase was found in all data studied. Computations of bed velocity indicate that this parameter also tends to increase myboat098 boatplans Size: 1MB. Jul 24, �� River velocity is determined by the efficiency of the river in overcoming friction with the bed and banks. Approximately 95% of a river's energy is lost to friction. Velocity increases as a river. As the river moves from the source to the mouth � both the depth of the river and the width of the river will Upstream And Downstream River Problems both increase. The load of a river will also change as it is transported and eroded. As a river Upstream And Downstream River Example flows downstream, its velocity increases. The speed increases due to the fact that more water is added from tributaries along the course of the river. Additionally, less water is in contact with the river bed, which results in less energy needed overcome friction. The larger mass of water causes wider and deeper water channels in order to allow water in the river to flow more freely. Gradient. The slope of a river decreases as it flows progressively downstream. Gravitational force is stronger uphill, but gentle in the lower course. The water tends to flow slowly due to higher water. So, in an ideal river, the velocity will increase downstream because the channel is more efficient, and there is a greater body of water. Source(s): GCSE Geography Textbooks 0. 0. What do you think of the answers? You can sign in to give your opinion on the answer. Sign in.� if the river narrows the weight of water increases and pushes it myboat098 boatplans tidal the fresh stays at a constant myboat098 boatplans salt water will be below the lighter fresh on top. 0. 0. Anonymous. 1 decade ago. just a thought but if you put a ball at the top of a downhill slope, it will start to roll and as it goes further it gathers momentum. rivers only travel downhill, gathering mass as they head for sea level the heavier they get and the further they travel, i would imagine is the reason they run faster. Velocity increases in a downstream direction because more sources of water combine depth and width. A constant flow of water would result in a higher river velocity. � It won't increase BECAUSE it goes downstream. Rather, the speed of the river depends on other factors, such as how narrow the riverbed is, or on the slope. Why does the depth of a river change downstream? because of more water in it and the speed of velocity increase the depth. Why does the discharge of a river increase downstream? Discharge increases as you move downstream because as more tributaries join the river further downstream. This means there is a greater volume of water in the river. What happens to the velocity of a river in the downstream direction?.
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