What is Knick point in geography?
A knick point in geography is a term used to describe a break or a change in slope in the profile of a river. It is a point on a river where there is a sudden change in gradient, usually caused by the uplift of the land. Knick points reflect different conditions and processes on the river, often caused by previous erosion due to glaciation or variance in lithology.
What is a Knick Point?
Knick points can be defined as an abrupt change in the gradient of a river channel. They are formed as a result of a sudden change in the amount of water flowing through the river, or due to changes in the substrate over which the river flows. Knick points may also be caused by the uplift of the land or changes in lithology. As a result of these changes, the river will start to erode the bedrock, causing the water to flow faster and the gradient to steepen.
Types of Knick Points
There are two types of knick points: upstream knick points and downstream knick points. Upstream knick points are characterized by a steep gradient, often with a waterfall or rapids. Downstream knick points are characterized by a more gradual gradient, often with a meandering river channel.
Meaning of Knick Points
Knick points are significant features in the landscape, as they reflect the history of the river and the surrounding area. They provide insight into the geological processes that have shaped the landscape and can be used to study the evolution of rivers and the surrounding landforms. Knick points also provide valuable information for engineers and planners, as they can indicate areas of potential erosion and flooding.
Examples of Knick Points
One of the most famous examples of a knick point is Niagara Falls, located on the Niagara River between Lake Erie and Lake Ontario. The falls were formed as a result of the upstream knick point that occurred due to the retreat of the glaciers during the last ice age. The steep gradient of the river caused the water to erode the soft rock beneath the hard limestone cap, resulting in the formation of the falls.
Another example of a knick point is the Grand Canyon, located in the western United States. The canyon was formed as a result of the downstream knick point that occurred due to the uplift of the land. The Colorado River, which flows through the canyon, gradually eroded the bedrock over millions of years, causing the canyon to deepen and widen.
