cee5734_hw9_2011_solutions

cee5734_hw9_2011_solutions - Virginia Tech Department of...

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1 Virginia Tech Department of Civil and Environmental Engineering CEE 5734 – Urban Hydrology and Stormwater Management Homework #9: Mechanics of Continuous Streamflow Modeling with SWMM Solutions Problem 1. (omitted for now) There were two possible interpretations of Problem 2. Some interpreted problem 2 as having NO AQUIFER, some interpreted problem 2 as having an aquifer with A1=1, B1=1. Either interpretation is accepted. If you assumed no aquifer, then problem 3 should include a case of A1=1, B1= 1. If you assumed aquifer was present, then problem 3 needs to investigate two more settings of A1, B1. Problem 2. “Base Run”. No Aquifer is present. Part a. The graph is shown below: Part b. The observed and simulated discharges were loaded into Excel and the Nash-Sutcliffe and Deviation volume metrics were calculated. Important intermediate and final statistic values are presented below: Volume of observed hydrograph: 2945.7 ft 3 /s-days Volume of simulated hydrograph: 3512.7 ft 3 /s-days Average observed discharge: 8.08 ft 3 /s Sum of squared differences between observed and simulated discharges: 115,173 (ft 3 /s) 2 Sum of squared differences between daily observed and average observed discharge:
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cee5734_hw9_2011_solutions - Virginia Tech Department of...

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