STEADY AND UNSTEADY GRADUALLY VARIED FLOW CALCULATION FOR GRAVITY PIPES USING MICROSOFT EXCEL

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ZAGHLOUL N.A.; El-Ghany m.a.

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Journal Paper

Paper Information

Journal: ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING) Year:2001 | Volume:2 | Issue:2 Page(s): 111-129

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Title

STEADY AND UNSTEADY GRADUALLY VARIED FLOW CALCULATION FOR GRAVITY PIPES USING MICROSOFT EXCEL

Author(s)

ZAGHLOUL N.A. | El-Ghany m.a. | Issue Writer Certificate

Keywords

STEADY GRADUALLY VARIED FLOW

GRAPHICAL INTEGRATION METHOD

UNSTEADY GRADUALLY VARIED FLOW

THE SAINT-VENANT EQUATIONS

HOD

FLOW ROUTING

URBAN DRAINAGE AND SEWERAGE SYSTEMS

Abstract

The length of the STEADY GRADUALLY VARIED FLOW (G.V.F) profile in a circular gravity pipe section is computed using the GRAPHICAL INTEGRATION METHOD. The equations used for the solution are: a) the dynamic equation of Gradually Varied Flow in a prismatic channels, b) the hydraulic exponents M and N equation derived by Chow [2], and c) the Varied hydraulic exponents M (y/do) and N(y/do) equation modified by Zaghloul [15]. The results of the calculated G.V.F profile length using the modified hydraulic exponents M(y/do) and N(y/do) equation are closer to the G.V.F length calculated based on the exact formulation of the G.V.F dynamic equation. The percentage difference ranges from 0.67% to 8.72% for various bed slopes and G.V.F depth limits. The calculated G.V.F profile length using the Chow hydraulic exponents M and N resulted in wider values with percentage difference ranges from 0.16 to 25.59%. Hence, a remarkable improvement of the computation of G.V.F profile is achieved using the modified M(y/do) and N(y/do) hydraulic exponents.The unSTEADY GRADUALLY VARIED FLOW wave propagation in circular gravity pipe section is simulated using the Explicit Method. The Extended Transport block (EXTRAN) of the latest Storm Water Management Model (PCSWMM2000) was used to route the wave through a circular gravity pipe section. The resulting routed hydrographs by the Explicit Method and the EXTRAN Block of the PCSWMM 2000, provided similar flow peak and lag time in both cases.A computer package was developed for the Steady G.V.F length calculation for gravity pipes using the Microsoft Excel spreadsheet. The results are plotted using the Excel graphics capabilities.A second computer package using Microsoft Excel was developed for the Unsteady G.V.F simulation based on the Explicit Method. The routed hydrographs arc plotted by the Excel graphics capabilities.The Excel packages for the Steady and Unsteady G.V.F are user friendly and are posted on the Internet Website location http://briefcase.yahoo.com/civil engineering2001.ARead me File is provided for each Excel package and is used as a users guide.

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APA: Copy

ZAGHLOUL, N.A., & El-Ghany, m.a.. (2001). STEADY AND UNSTEADY GRADUALLY VARIED FLOW CALCULATION FOR GRAVITY PIPES USING MICROSOFT EXCEL. ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING), 2(2), 111-129. SID. https://sid.ir/paper/298587/en

Vancouver: Copy

ZAGHLOUL N.A., El-Ghany m.a.. STEADY AND UNSTEADY GRADUALLY VARIED FLOW CALCULATION FOR GRAVITY PIPES USING MICROSOFT EXCEL. ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING)[Internet]. 2001;2(2):111-129. Available from: https://sid.ir/paper/298587/en

IEEE: Copy

N.A. ZAGHLOUL, and m.a. El-Ghany, “STEADY AND UNSTEADY GRADUALLY VARIED FLOW CALCULATION FOR GRAVITY PIPES USING MICROSOFT EXCEL,” ASIAN JOURNAL OF CIVIL ENGINEERING (BUILDING AND HOUSING), vol. 2, no. 2, pp. 111–129, 2001, [Online]. Available: https://sid.ir/paper/298587/en

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