Precipitation mm 25 20 15 10 O 12 00 Discharge Line Urban

Last updated: 4/24/2023

Precipitation mm 25 20 15 10 O 12 00 Discharge Line Urban Peak Rainfall Rain Event 16 00 20 00 Day 1 Peak Discharge Urban Area 3 Refer to Figure 15 2 00 00 T 04 00 Peak Discharge Rural Area 08 00 12 00 16 00 Day 2 Discharge Line Rural 20 00 00 00 Time Figure 15 2 Two Hypothetical Hydrographs for Rural and Urban Environments 269 04 00 Day 3 35 30 25 20 15 10 s Discharge cubic meters sec a What is the approximate lag time for the urbanized area b What is the approximate lag time for the rural area c Use Your Critical Thinking Skills Why is there a difference between the lag time for an urbanized area and a rural area Explain your response in one to two sentences d Use Your Critical Thinking Skills What if the storm event dropped snow rather than rain What would the hydrograph look like Explain your response in one to two sentences e Use Your Critical Thinking Skills What if the storm event was a warmer more tropical storm dropping a larger quantity of warm rain on a pre existing snow