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How to fill out the OSD Calculation online
This guide provides detailed instructions on how to accurately complete the OSD Calculation form. Follow the steps carefully to ensure that all required information is properly filled out in this essential drainage design summary.
Follow the steps to complete your OSD Calculation form online.
- Press the ‘Get Form’ button to retrieve the OSD Calculation form and access it in your preferred online workspace.
- Begin by entering your DA number in the designated field at the top of the form.
- Fill in the 'Project' section with the name of your project, and specify the 'Location' of the site.
- Input your name in the 'Designed by' field along with your 'Company' name and 'Phone' number for contact purposes.
- Define the 'Site Area' in hectares, indicating the total area of your project site.
- Calculate the 'Basic storage volume' by multiplying the SSR by the site area and enter the result.
- Determine the 'Basic discharge' by multiplying the PSD by the site area and note the value.
- In the section for 'Area of site drained to storage,' input the area drained, ensuring it is no less than 75% of the total site area.
- Calculate the percentage for [D] and input it in the relevant field.
- Compute the storage per ha of contributing area by dividing basic discharge by the percentage found in [D].
- Use the provided equation to enter the volume/PSD adjustment for SSR and calculate the new PSD in litres/second/ha.
- Determine the PSD by inputting the relevant figures in the multiplication equation provided.
- Record the maximum head to orifice centre and the value of HWeir.
- Calculate the selected orifice diameter using the formula provided and enter your result.
- Find and enter the maximum discharge into the respective field.
- Identify the head for high early discharge and enter that measurement.
- Calculate the high early discharge using the calculation provided, ensuring that it meets the minimum requirements.
- Compute the approximate mean discharge using the provided formula.
- Calculate the average discharge per hectare using the given formula and characteristics.
- Enter the SSR equation values and compute the relevant output in cubic meters per hectare.
- Determine the final SSR by multiplying the respective values and record your findings.
- Calculate the primary, secondary, and tertiary storage proportions as indicated, entering each value.
- Verify that the total of primary and secondary storage proportions matches the specified 'S' value.
- Finally, ensure the form is signed with the appropriate date before submission.
Complete your OSD Calculation form online today for precise drainage design.
Overtaking Sight Distance (OSD) d2 = Distance traveled by vehicle A from position 2 to Position 5 during the actual overtaking operation in time T sec. Where, d3 = Distance traveled by oncoming vehicle C from position 6 to position 5 during the overtaking operation of A, i.e., T sec.
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