headwaters
A river system that operates inside a drainage basin. A drainage basin is the area of land drained by a river and its tributaries.
"Upper Egypt" is the area of Egypt closest to the Nile's source. "Lower Egypt" is the area of delta where the river flows into the sea. Upper Egypt is South, lower is North.
A river always flows from the highest to lowest elevation, and so Lower Egypt is in the North and Upper Egypt is in the South. It seems backwards, but it does make sense because Lower Egypt has lower elevation than Upper Egypt so the delta empties there. It obviously makes more sense that a river flows downhill instead of uphill.
Yes the Dutch claimed the Hudson River area.
The Indus River Valley was an area in middle eastern Asia populated mainly by two cities. The Mohenjo-Daro and the Haarapa. The place gets it's name because it gets a lot of monsoons, a kind of wind storm which pushed temporary rivers through the valley.is the "Father River" and it is the major river which flows through the Indian subcontinent.
a watershed
drainage basin
This is technically known as a catchment basin.
runoff
A river system that operates inside a drainage basin. A drainage basin is the area of land drained by a river and its tributaries.
The area drained by a river and its tributaries.
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A river basin is an area of land drained by a river and its tributaries.
The water from precipitaion that flows over the land surface but is not abosrbed is called runoff. The definition of runoff is the portion of precipitation on an area which does not infiltrate, but is instead discharged from the area.
An area of land that drains to one river (or a river and its tributaries) is a drainage basin or watershed.
delta:)
I think you mean the source of a river, which is usually in the mountains.