ISOCHRONES DELINEATION IN CONVERGING FLOWS FOR USING IN TIME-AREA METHOD

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SHOKOUHI A.R.; SAGHAFIAN B.

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Paper Information

Journal: IRAN-WATER RESOURCES RESEARCH Year:2008 | Volume:3 | Issue:3 (9) Page(s): 20-29

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Information Journal Paper

Title

ISOCHRONES DELINEATION IN CONVERGING FLOWS FOR USING IN TIME-AREA METHOD

Author(s)

SHOKOUHI A.R. | SAGHAFIAN B. | Issue Writer Certificate

Keywords

TIME-AREAQ4

CONVERGING FLOWQ4

KINEMATIC WAVEQ4

TIME TO EQUILIBRIUMQ3

ISOCHRONEQ4

Abstract

This paper studies available methods for ISOCHRONEs delineation in CONVERGING FLOW and compare those with KINEMATIC WAVE approach. This paper also tries to introduce a method based on wave motion theory instead of empirical methods. Authors in their previous research on parallel flow showed that many of the available methods give travel time with supposition of proportionality of TIME TO EQUILIBRIUM with an exponent of distance of points to outlet. Investigation on a large range of exponents shown that using the exponent derived from KINEMATIC WAVE theory, is the best one and gives the closest answer to analytical solution for rising limb of hydrograph. The obtained results for CONVERGING FLOW approve the results achieved in parallel flow analysis. The equations governing on CONVERGING FLOW is so complicated that there are only a few solutions for rising limb of hydrograph. The time- Area method is one of the most suitable and the simplest techniques of watershed routing, and can be potentially used as a distributed model. Linking this model with GIS software is easily performed. Results of the present research, by omitting the limitation of empirical delineation of ISOCHRONEs, make Time Area method capable of solving overland flow on watersheds of any type, easily and perfectly.

Cites

DETERMINATION OF THE CATCHMENT'S TIME-AREA DIAGRAM BY USING NASH INSTANTANEOUS UNIT HYDROGRAPH TECHNIQUE

References

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APA: Copy

SHOKOUHI, A.R., & SAGHAFIAN, B.. (2008). ISOCHRONES DELINEATION IN CONVERGING FLOWS FOR USING IN TIME-AREA METHOD. IRAN-WATER RESOURCES RESEARCH, 3(3 (9)), 20-29. SID. https://sid.ir/paper/99962/en

Vancouver: Copy

SHOKOUHI A.R., SAGHAFIAN B.. ISOCHRONES DELINEATION IN CONVERGING FLOWS FOR USING IN TIME-AREA METHOD. IRAN-WATER RESOURCES RESEARCH[Internet]. 2008;3(3 (9)):20-29. Available from: https://sid.ir/paper/99962/en

IEEE: Copy

A.R. SHOKOUHI, and B. SAGHAFIAN, “ISOCHRONES DELINEATION IN CONVERGING FLOWS FOR USING IN TIME-AREA METHOD,” IRAN-WATER RESOURCES RESEARCH, vol. 3, no. 3 (9), pp. 20–29, 2008, [Online]. Available: https://sid.ir/paper/99962/en

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