fact_wave_hub on Instagram: "A dam blocks the natural flow of a river, causing water to collect and form a reservoir. This flooding changes the river’s original shape and the surrounding landforms. Downstream, reduced water flow can narrow the river, alter sediment deposition, and reshape the landscape, leading to long-term changes in the river’s natural topography. Learn something new here everyday Via : @fact_wave_hub #river #dam #topography #fyp #exploring instalike"