2. Why are floodplains important for controlling river flooding and supporting ecosystems? __ 3. What strategies can humans use to reduce river pollution and protect water quality? __ 4. How does sediment transport affect the formation of deltas over time? __

2. Floodplains are important for controlling river flooding and supporting ecosystems because they act as natural buffers during times of high water levels. They absorb excess water, reducing the risk of flooding downstream. Additionally, floodplains provide habitat for a variety of plant and animal species, contributing to biodiversity and supporting the overall health of the ecosystem.<br /><br />3. Humans can reduce river pollution and protect water quality by implementing the following strategies:<br /> - Properly disposing of household chemicals and waste to prevent them from entering waterways.<br /> - Reducing the use of pesticides and fertilizers in agriculture, which can run off into rivers during rainstorms.<br /> - Promoting sustainable industrial practices that minimize the discharge of pollutants into rivers.<br /> - Educating the public about the importance of keeping rivers clean and encouraging community involvement in river clean-up efforts.<br /><br />4. Sediment transport plays a crucial role in the formation of deltas over time. As rivers carry sediment downstream, they deposit it in the delta region, building up the land and creating new landforms. This process helps to create the characteristic fan-shaped structure of a delta. However, excessive sediment transport can lead to problems such as clogging of navigation channels and loss of habitat for aquatic life.