Rosenblatt defines that struggle between the man and the water in broad terms what does the struggle represent

Rosenblatt is saying that the struggle between the man and the water is a symbolism for life. In this struggle the man is extremely powerful which should not be the case as it is said that nature is always stronger over man. This is to show that even though nature is strong, man is also powerful in the sense that man can save others lives in spite of nature and all its strength.