Question

Compare the above system with the probable systems in hilly / mountainous areas or plains or plateau regions.

Answer 1

$Bonjuor!!$

✳ In hilly/mountainous regions, dams are check built over water. In this kind of system, water (running) is stored and moved to the required places. There is no chance of that type of water getting stagnant or impure.
Hence, it can remain for long time.

$Hope \: it \: helps!$
$@charlie16.$

Answer 2

This is your answer

I hope it will help you

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