# Trapezoidal channel area formula

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The most efficient trapezoidal section of canal can be calculated as follows Let, Base width of the canal=B Side slope=m (1V:mH) Flow depth = h Wetted perimeter= P The cross sectional area, A=By+my^2 ie B= (A-m*h^2)/h ie B=A/h-m*h Wetted perimeter P= B+2*h *sqrt(m^2+1) For most efficient channel, dP/dh=0 ie -A-m*y^2+2 y^2 sqrt(m^2+1)=0 ie B= y(2*sqrt(m2+1)-1-m)…About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators ...