It's a gully. Rills are smaller ditches cut by running water, but can be plowed over. Once the ditch is so deep it can't be plowed over, it's a gully.
A river.
(Rephrase the question)
No. There is more oxygen in deeper water.
Photosynthetic organisms need light in order to survive. In very deep water there is no light.
Deep currents
the river running through rock wear it down into deep valley with the steep sides what is it called
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This is known as a gully, which forms through erosion as water flows downhill, cutting into the soil and creating a channel. Gullies can become larger and more pronounced over time if not properly managed, leading to soil erosion and potential environmental challenges.
A canion.
A deep gully or ditch carved by running water is called a ravine. It is typically formed by the erosive forces of flowing water over a long period of time, creating a narrow and steep-sided channel in the landscape.
Canyon
A deep water carved gully or ditch is a channel formed in the Earth's surface by the flow of water. These features are typically created through erosion over long periods of time, usually by rivers or streams carrying water that cuts into the land and forms a steep-walled channel. They are common in areas with high water flow or where the land is soft and easily eroded.
A gully is a water-worn ravine or small valley, often caused by erosion from heavy rain or flooding. A ditch, on the other hand, is a man-made trench dug to channel water or provide drainage. While both can be used to manage water flow, gullies typically form naturally, whereas ditches are constructed by people.
It is called a moat
Another word for a deep ditch that is dug around a castle is a moat. You could call it a trench, or you could fill it full of water and call it a moat.
The water is 27.6 in deep and slopes up to even with the running surface
The men dug a deep ditch to lay pipes for the new septic tank. I fell in the ditch, but luckily it was dry.
It varies, but it is usually 50 feet deep in most places.
A long, narrow deep ditch.