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There are a number of causes of cramps. Some causes can be being dehydrated, taking shallow breaths, over stretching of a muscle or exercising for too long.
They tried to find 'fords' where the river widened and got shallow.
Too much water in the river, causing the water to "wash over" the river bank.
In the river. Not over it. Not under it. And not next to it. In the river.It depends what type of fish and what river or lake. Usually for a river the best place is at a long, not too shallow, slow flowing area.
Using reservoirs (lodges) and lock gates to maintain a water level in a canal, means that boats can travel on the canal in all but the winter, when the canal may be iced over. On a river, the water level depends on rainfall, and could become too shallow during the summer.
weathering, and erosion
it causes the molecules in the batter to thicken and become heavier
The surrounding land will become flooded.
Over time the moving water carries particles of the river bed and banks away, and if there happens to be a flood that can happen much more quickly.
It could become a waterfall. Or if it just flows over onto more land then it becomes a river, not a stream.
the rocks get grind ed together over and over by the force of water pushing it and eventually become sand.
The earth can be reshaped over time through several processes including weathering and through plate tectonics. Weathering causes the creation of river valleys while the movement of plates causes mountains to form.