Sentence:  The next series of high tides or large waves will tend to rebuild the berm and redam the stream. Ultimately, increased <WSD>runoff</WSD> due to fall or winter rains will raise the stream level to the point where it breaks through. 
Meaning of the word marked with <WSD> tags:  That portion of precipitation or irrigation on an area which does not infiltrate or evaporate, but instead is discharged from the area.