Unit 3 Rivers Flashcards
Erosion
The process of wearing away the earth’s surface through the action of water, wind, or other natural agents.
Deposition
The process of depositing sediment or other material that has been eroded and transported by natural agents.
Transportation
The process by which rivers carry materials as they flow.
Types of Transportation
- traction: large rocks and boulders are rolled along the riverbed
- saltation: small pebbles, stones and slit bounce along the riverbed
- suspension: fine, light materials like clay and sediment are carried by the river
- solution: dissolved materials are carried by the river
Discharge
The volume of water that flows through a river or stream in a given period of time.
Drainage basin
The area of land drained by a river or stream and its tributaries.
Flood plain
The flat or gently sloping land along the banks of a river or stream that is prone to flooding during periods of high water flow.
Fluvial landforms (oxbow lakes and waterfalls)
Features that are created by the processes of erosion and deposition in rivers, such as ox-bow lakes formed by meandering rivers and waterfalls created by erosion of the river bed.
Causes of flooding
Factors that contribute to the occurrence of floods, such as heavy rainfall, snowmelt, and the failure of man-made structures like dams.
Threats to rivers / coasts e.g. pollution
Activities that have negative impacts on the natural environment of rivers and coasts, such as pollution from industry, agriculture, and urbanization.
How do humans interact with rivers / coasts?
The various ways in which humans use and modify rivers and coasts for their own purposes, such as for transportation, irrigation, and recreation.
Should humans be allowed to interact with rivers/coasts?
The answer to this question depends on various factors, including the specific context and the degree of interaction. Humans have been interacting with rivers and coasts for centuries, using them for transportation, fishing, agriculture, and other purposes. However, these activities can have negative impacts on the natural environment, such as pollution, erosion, and habitat destruction.
Therefore, it is important to balance the benefits of human interaction with rivers and coasts with the need to protect these natural resources for future generations. This can involve implementing regulations and sustainable management practices that minimize the negative impacts of human activities, while also preserving the natural environment and its resources. Ultimately, it is up to society as a whole to determine the appropriate level of interaction with rivers and coasts, taking into account ethical, environmental, and economic considerations.
