Lab 2 Solutions

Lab 2 Solutions - CEIE 340 Lab 2 Solutions Fall 2006...

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CEIE 340 Lab 2 Solutions Fall 2006 YHK Page 1 of 5 Problem 1 The numbers in red in the table below are the values either computed or read from Figure 4.4. Intensity [in/hr] Depth [in] Duration [hr] Frequency [yr] 2.5 1.9 0.75 5 0.7 4.2 6.00 25 8.0 2.0 0.25 100 5.0 2.5 0.50 50 0.3 7.2 24.00 100 4.0 2.7 0.67 50 Problem 2 Station Average Method : The rainfall depths at each gauge are averaged in this method. Here are the calculations: Station Rainfall [in] Weight Weighted Contribution [in] A 0.7 0.20 0.14 B 1.2 0.20 0.24 C 1.3 0.20 0.26 D 1.6 0.20 0.32 E 2.1 0.20 0.42 Station Average Rainfall Depth [in] = 1.38 Thiessen Method : This method begins by dividing the area of the watershed into subareas. Each subarea is associated with a single gauge, and includes all of the watershed area that is closest to that gauge. The diagram below shows the four subareas.
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CEIE 340 Lab 2 Solutions Fall 2006 YHK Page 2 of 5 The area of each subarea is estimated. In this case, a grid was superimposed on the watershed diagram and the numbers of squares associated with each subarea counted.
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This note was uploaded on 11/11/2009 for the course CEIE 340 taught by Professor Choudhury during the Spring '09 term at George Mason.

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Lab 2 Solutions - CEIE 340 Lab 2 Solutions Fall 2006...

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