The storm hydrograph 3.0 / 5 based on 1 rating ? GeographyWater and riversGCSEOCR Created by: Dempsey06Created on: 14-04-15 13:08 9751032146 Across 1. Water can't infiltrate into the rock so there's more runoff and a shorter lag time (11, 4) 4. The decrease in river discharge as the river returns to its normal level (7, 4) 5. ... have more vegetation, which decreases discharge. There are also more reservoirs in rural areas - they store water and release it slowly, decreasing discharge in the river below. This means hydro-graphs for rivers in ... are more gently sloping (5, 5) 6. ... have drainage systems and they're covered with impermeable materials - these increase discharge so hydro-graphs for rivers in ... are steep (5, 5) Down 2. The delay between peak rainfall and peak discharge (3, 4) 3. Causes more runoff and a shorter lag time (5, 6) 5. The increase in river discharge as rainwater flows into the river (6, 4) 7. Causes more runoff and a shorter lag time (7, 8) 9. Water can infiltrate into the rock so there's less runoff and a longer lag time (9, 4) 10. The highest discharge in the period of time you're looking at (4, 9)
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