dikes (n) - an embankment for controlling or holding back the waters of the sea or a river.
sluices (n) - a sliding gate or other device for controlling the flow of water, especially one in a lock gate.
trickling (v) - flowing in a small stream (a liquid)
numb (adj.) - deprived of the power of sensation.
chattered (v) - feeling cold and frightened that one can’t stop the upper teeth from against ones lower teeth.
crouching (v) - adopting a position where the knees are bent and the upper body is brought forward and down.
groan (v) - make a deep inarticulate sound conveying pain
shovels (n) - tool resembling a spade with a broad blade and typically upturned side, used for moving earth, coal, snow etc.