Why do floodplains make good farmland?

The water brings in nutrients to the soil therefore making the plants have a lot of nutrients. Also, the water helps plants grow too.

The formation of the floodplain on a valley floor is caused by the river . The river channel naturally meanders through the landscape and over time deposits sand , silt and other soil forming material , especially during floods . These deposits provide fertile soil for agricultural production

Hydropower dams degrade water quality along rivers. Water that flows downstream from the dams is depleted of oxygen, which harms many aquatic animals. The reservoirs above dams are susceptible to harmful algal blooms, and can leach toxic metals such as mercury from submerged soil.

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