Final answer:
Melting ice releases water and sediment, changing drainage patterns and contributing to sea level rise. It also affects the physical environment and river discharge.
Step-by-step explanation:
Melting ice releases water and sediment that can create new or larger channels. This process can change drainage patterns and directions after the glacier has melted and the land is uplifted.
Additionally, the melting of ice contributes to sea level rise and can have various impacts on the physical environment, such as changes in the freezing and breaking up of ice, glacier retreat, and increased melt rates.
River discharge, which is the amount of water moving through a river channel, is influenced by surface runoff and groundwater seepage, both of which can be affected by the melting of ice.