With reference to an example which you have studied, describe and explain ONE way that humans can have an effect on river processes or marine (sea) processes or mass movement. - Leaving Cert Geography - Question Question 1 - 2007

When forest cover is removed, there is a decrease in the soil's ability to absorb water. This leads to increased runoff during rainfall, which contributes to enhanced erosion of riverbanks. Erosion can cause sedimentation in rivers, negatively affecting water quality and aquatic habitats.

Moreover, the loss of trees disrupts the natural water cycle; trees play a critical role in transpiration, which helps to maintain local humidity levels and precipitation patterns. Without them, areas can become more susceptible to flooding as water is not effectively absorbed or captured by the soil.

Thus, deforestation illustrates how human activities can significantly alter river processes, leading to ecological disruptions.

1. Increased surface runoff leads to higher flood risks.
2. Lower water quality due to sedimentation.
3. Loss of habitat for aquatic life due to altered environments.
4. Increased erosion rates along riverbanks.
5. Disruption of local climate patterns.
6. Changes in sediment transport dynamics.
7. Decreased biodiversity in the affected areas.
8. Impacts on human settlements near rivers due to flooding.

An example of this is the Amazon Rainforest, where extensive deforestation has significantly affected the river processes surrounding the region.