Earth Science - New York Regents January 2007 Exam

Base your answers to questions 39 and 40 on the two graphs below, which show the relationship between the amount of rainfall during a storm and the amount of discharge into a nearby stream. Letter A represents the time when approximately 50% of the precipitation from the storm has fallen. Letter B represents the time when peak runoff from the storm is flowing into the stream. The delay is the difference in time between letters A and B on the graph. Graph I shows data before urbanization in an area. Graph II shows data after urbanization in the same area.