8/20/2023 0 Comments Hypack cross sections![]() Using a radius of 15m, this is calculated as: AM = πR2/2 = 3.14159 * 152 / 2. In order to compute this, we will need the area across the midpoint of the section. 2: PRISMOIDAL FORMULA #1 (WITH MIDPOINT SECTION) Some text books advocate the usage of a prismoidal formula as follows: VOL12 = (A1 + 4*Am + A2) * L / 6 July / 2013 ![]() 1: AVERAGE END AREA Most computations of volumes by cross sections across a channel use the Average End Area approach. Section 2 at line 21+00 has a perfect radius of material that is 20m. The area above the planned line can be computed using: A1 = πR2/2 = 3.14159 * 102 / 2. Section 1 at line 20+00 has a perfect radius of material that is 10m. Volumes by Sections Using Prismoidal Formulas: A Case Study of Different Methods by Pat Sanders In order to illustrate the different possibilities for computing volumes by sections and their associated results, let us investigate the following example: FIGURE 1.
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