Answer
Two situations that could trigger the formation of incised meanders are changes in base level and tectonic uplift. A drop in base level, such as a decrease in sea level or the creation of a dam, can cause the stream to downcut rapidly, leading to the formation of incised meanders. Tectonic uplift, which raises the elevation of the land, can also induce downcutting and the development of incised meanders as the stream adjusts to the uplifted landscape.
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