This satellite image shows a small portion of the Zagros Mountains in dry southe

Question

This satellite image shows a small portion of the Zagros Mountains in dry southern Iran. Streams in this region flow only occasionally. The green tones on the image identify productive agricultural areas.

a) Identify the large feature that is labeled with a question mark.

b) Explain how the feature named in Question a formed.

c) What term is used to describe sreams like the ones that occure in this region?

d) Speculate on the likely source of water for the agricultural aeras in this image.

Explanation / Answer

a) The large feature that is labelled with the question mark is called '' Wadi ''.

b) Wadi is an Arabic word refering as ' Valley' but in some other cases like here it refers the Valleys which contain dry river bed (Shown in the Image) where water remains only during times of heavy rain.Wadi is developed mainly in flat parts of deserts often bounded by mountains commonly they begin on the distal portion of the fans.

c) The streams that occurs in this region is called '' Intermittent '' stream means seasonal streams which flows occasionally or part of the year.

d) Catastropic flash flood after seasonal heavy rainfall or the subsurface water after storm is the main source of water for the agricultural area of this image.

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