![]() Yes, we believe our results will help to shed some light on the drivers of channel change and help us understand how river channels may respond to externally controlled factors, like sediment load. Will your findings advance the state of knowledge about meander migration? By extending our record into the past we were able to examine how the reaches changed through time providing us with a truly invaluable dataset. Landsat enabled us to collect a multi-decadal record of the reaches at almost annual resolution. What insight did you gain from Landsat that would have been impossible to glean otherwise? We also show that this bend growth behaviour may be attributed to the sediment load carried by the reach. ![]() If a bend grows predominantly in the downstream direction, it lengthens more quickly. Our research suggests that the way in which meanders evolve through time can dictate how quickly a river increases its sinuosity. What are the major findings of your research? Sediment driven meander migration in the Amazon Basin Using Landsat data to examine river movement through time, his team has made new observations about river channel change. A stalagmite is formed through deposits that build up in a cone shape on the cave floor.Joshua Ahmed from Cardiff University studies how river meanders evolve. A stalactite is formed from deposits in dripping groundwater that hang on the roof of a cave. Inside limestone caves, deposits called stalactites and stalagmites form. Groundwater is underground water that can cause erosion through chemical weathering, forming caves. Not all water becomes runoff some of it soaks into the ground. Finally, a delta is sediment deposited where a river flows into an ocean or a lake that builds up a landform. An oxbow lake is a meander that has been cut off from sediments being deposited and damming up the ends. A meander is a loop-like bend in the course of a river, becoming more curved over time. Flood plains are a flat and vast area of land along a river that is often covered when the river overflows during a flood. The harder rock pieces break off when softer rock erodes, creating a waterfall’s sharp drop. It forms where a flat layer of strong rock lies over a layer of softer rock. Waterfalls occur when a river meets an area of rock that erodes slowly. Through erosion, a river creates waterfalls, flood plains, meanders, and oxbow lakes. A stream is an active channel that erodes land and transports sediment. They break down rocks and transport sand and sediment. The river eventually leads out to the ocean, where waves are the primary force of erosion along coasts. Because of gravity, runoff, and moving material, a river will form various features that shape the land. Imagine standing on the top of a mountain and following the drops of rainfall at the source of a river all the way out to the crashing waves of the ocean. Water erosion is a significant factor that has shaped Earth’s land. ![]() Moving water is a major agent of erosion, especially along streams and rivers, at beaches, and underground. Erosion is the process by which sediment, weathered rock, and soil are moved from one location to another.
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