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Estimating Manure Inventory

Calculating Width and Length of the Manure Surface

A storage facility has a top width of 24 m and a length of 30 m. The sidewalls have a measured slope angle of 70º and length of 8.7 m. The length of the freeboard is 2.1 m. The difference between the total length of the facility wall and the length of the freeboard is:

Difference in length (m) = slope length (m) – length of freeboard (m) = 8.7 m – 2.1 m = 6.6 m

Figure 4.1.15 Dimensions for Calculating the Width and Length of the Surface of the Manure in Storage

The width of the top surface of the manure in storage is estimated as:

Manure width = bottom width + (2 x (cosine factor of measured slope angle (Table 4.1.5) x slope length)) = 18 m + (2 x (0.342 x 6.6m)) = 18 m + (2 x 2.26 m) = 18 m + 4.52 m

= 22.5 m is the width of the top of the manure in the storage facility

The length of the top surface of the manure in storage is estimated as:

Manure length = bottom length + (2 x (cosine of measured slope angle (Table 4.1.5) x slope length)) = 24 m + (2 x (0.342 x 6.6m)) = 24 m + (2 x 2.26 m) = 24 m + 4.52 m

= 28.5 m is the estimated length of the top of the manure in the storage facility