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**Unformatted text preview: **3. Is H n ’ the same on the uphill & downhill sides? Solution: • The solution can be obtained by different methods, as explained in class. • The quickest and easiest solution is to use the New and Improved “OptManifold.exe” computer program, as shown below: • The New and Improved version of the program uses Hazen-Williams. • Due to approximations and simplifying assumptions in the equations, the calculated value of H n ’ is not exactly equal in the uphill and downhill parts of the lateral. • The tree spacing is given as S p = 5.0 m. Make the downhill lateral 375-m long, and the uphill lateral will be 175 m in length (a slight adjustment on the calculation results). • This gives 175/5 = 35 trees on the uphill side of the manifold, and 375/5 = 75 trees on the downhill side....

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