#622 Determine the cross-section of the greatest

Determine the cross-section of the greatest - Civil Engineering

ChemistryExplain daily providing Q&A content “#622 Determine the cross-section of the greatest" in Civil Engineering, Civil engineering career, Civil engineering companies near me, Civil engineering technician

Get the Free Online Chemistry Q&A Questions And Answers with explain. To crack any examinations and Interview tests these Chemistry Questions And Answers are very useful. Here we have uploaded the Free Online Chemistry Questions. Here we are also given the all chemistry topic.

 ChemistryExplain team has covered all Topics related to inorganic, organic, physical chemistry, and others So, Prepare these Chemistry Questions and Answers with Explanation Pdf.

For More Chegg Questions

• Inorganic Chemistry
• Organic Chemistry
• Physical Chemistry

Join Our Telegram Channel for Covers All Update by ChemistryExplain:- Click Now

Free Chegg Question

Determine the cross-section of the greatest hydraulic efficiency for a trapezoidal channel with a side slope of 1 vertical to 2 horizontal if the design discharge is 10 m3/s. The channel slope is 0.001 and Manning’s roughness factor is 0.020.

Free Chegg AnswerFor More Chemistry Notes and Helpful Content Subscribe Our YouTube Chanel - Chemistry Explain  

Free Chegg Answer

1. Step 1 of 3

   Find the uniform flow depth in the trapezoidal channel using manning’s formula.

   

   Denote the Discharge in the channel as, Area of the trapezoidal channel as A, Hydraulic radius as, Manning’s roughness coefficient as n, and Bottom slope as .

   Substitute  for  and  for .

    …… (1)

   Denote the Bottom width of the trapezoidal channel as , depth of flow as y, and Side slope as 1 vertical to horizontal.

2. Step 2 of 3

   Design the trapezoidal channel for maximum discharge

   Select the channel with a minimum wetted perimeter for a given discharge.

   Express the hydraulic radius formula.

   

   Express the area of flow in the channel formula.

   

   Find the Bottom width of the trapezoidal.

    …… (2)

   Find the uniform flow depth.

   Substitute  for A, 0.020 for n, 0.001 for  and  for R in Equation (1).

   

   

   Thus, the flow depth of the trapezoidal channel is .

3. Step 3 of 3

   Find the bottom width of the trapezoidal channel.

   Substitute 1.9328 m for y in Equation (2).

   

   

   Thus, the bottom width of the trapezoidal channel is .

   Thus, the cross-section with the greatest hydraulic efficiency is .