Other Data Select A Streamflow Hydrograph For A Large Preferably Single Peaked Runoff Event Separate The Base Flow An 1 (35.27 KiB) Viewed 32 times
Other Data Select A Streamflow Hydrograph For A Large Preferably Single Peaked Runoff Event Separate The Base Flow An 2 (22.94 KiB) Viewed 32 times
other data, select a streamflow hydrograph for a large, preferably single-peaked runoff event. Separate the base flow and determine a unit hydrograph for the area. 9.11 Measured total hourly discharge rates (in cfs) from a 2.48-mi² drainage basin are tabu- lated below. The hydrograph was produced by a rainstorm having a uniform intensity of 2.60 in./hr starting at 9 a.m. and abruptly ending at 11 a.m. The base flow from 8 a.m. to 3 p.m. was a constant 100 cfs. Time Discharge (cfs) 8 a.m. 100 9 100 10 300 11 450 12 300 1 150 2 100 3 p.m. 100 (a) At what time did direct runoff begin? (b) Determine the gross and net rain depths (in inches). (c) Derive a 2-hr unit hydrograph for the basin by tabulating time in hours and discharge in cubic feet per second.
Chapter 9 Hydrographs (d) Derive a 4-hr unit hydrograph for the basin. (e) Derive a 1-hr unit hydrograph for the basin. 9.12 Use the following 4-hr unit hydrograph for a basin to determine the peak dim (cfs) resulting from a net rain of 3.0 in./hr for a 4-hr duration followed immedi in./hr for a 4-hr duration.
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