Again the big gong beat, and a second time there was the rushing of naked feet on earth and ringing iron; the clatter of tools ceased. In the silence, men heard the dry yawn of water crawling over thirsty sand.”
This is from "The Bridge Builders" by Rudyard Kipling.
https://www.kiplingsociety.co.uk/tale/the-bridge-builders.htm
I don't understand the meaning of
the dry yawn of water
I am glad if someone would kindly teach me.