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Posted on January 21, 2023 (Updated on July 10, 2025)

Determining Thalweg line of river without bathymetry?

Hiking & Activities

How do you identify thalweg?

It looks like the Thalweg line follows a predictable pattern where it hugs the outside curve of a river when it meanders and is in the center of the river with it is straight.
 

Where is the thalweg of a river?

(geology, geography, cartography) The line that connects the lowest points in a valley or river channel, and thus the line of fastest flow or deepest water along a river’s course.

How is a thalweg formed?

In hydrological and fluvial landforms, the thalweg is a line drawn to join the lowest points along the entire length of a stream bed or valley in its downward slope, defining its deepest channel. The thalweg thus marks the natural direction (the profile) of a watercourse.

Why is the thalweg not always found in the middle of a river?

Because erosion is greatest where the stream flow is fastest, the thalweg is also the deepest channel in the stream. It is found in the top middle of a straight channel because this is where the water is the deepest and is where there is the least friction.
 

What is the thalweg of a river where might you find it on a straight or curving river?

The thalweg of the stream is the deepest part of the stream channel. In the straight parts of the channel, the thalweg and highest velocity are in the center of the channel. But at the bend of a meandering stream, the thalweg moves to the cut bank.
 

What is a thalweg GCSE geography?

In geography and fluvial geomorphology, a thalweg or talweg (/ˈtɑːlvɛɡ/) is the line of lowest elevation within a valley or watercourse.

What is the opposite of thalweg?

A talweg may be defined in contradistinction to an interfluve , which is all of what in a landscape is not talweg. But the opposite of the talweg itself is a divide , i.e., the lines joining all high points in topography.

What is a thalweg in a meander?

Quote from video:

What is thalweg in geomorphology?

In geography and fluvial geomorphology, a thalweg or talweg (/ˈtɑːlvɛɡ/) is the line of lowest elevation within a valley or watercourse.

What is a thalweg in a meander?

The thalweg denotes where greatest velocity is in a river. On a meander this is always on the outside of the bend where the water is deeper and more efficent as a result. This encourages erosion on the outside of the bend.

What is a thalweg principle in international law?

The Thalweg Doctrine, a part of International Law, aims to resolve water boundary disputes. According to this doctrine, the boundary between two states divided by a flowing body of water may be drawn along the thalweg, which is the line of the greatest depth of the channel.

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