ESTIMATION OF DIMENSIONLESS TIME-AREA DIAGRAM OF CATCHMENTS

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SABZEVARI TOURAJ; KARAMI MOGHADAM MEHDI

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Journal: WATERSHED ENGINEERING AND MANAGEMENT Year:2018 | Volume:10 | Issue:3 Page(s): 489-494

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Title

ESTIMATION OF DIMENSIONLESS TIME-AREA DIAGRAM OF CATCHMENTS

Author(s)

SABZEVARI TOURAJ | KARAMI MOGHADAM MEHDI | Issue Writer Certificate

Keywords

CLARKQ1

DIMENSIONLESS TIME-AREAQ1

JAFARABADQ2

KASILIANQ1

NASHQ1

SHOURANDIKAQ1

Abstract

Time-area hydrograph and CLARK’s methods are commonly used for prediction of runoff in catchments. In the both methods, the Time-Area Diagram (TAD) of the catchment is needed. In this study, two methods for estimation of DIMENSIONLESS TIME-AREA Diagram (DTAD) are introduced. In the first method, called geometric method, a hyperbolic function for the geometry of the catchment is assumed. Furthermore, travel time is assumed to be proportional to an exponent (b) of flow distance to outlet. It was shown that the resultant DTAD equation is equal to USACE (1990) equation when is one. In another method, called NASH-TA, DTAD equation was derived as a function of NASH model parameters. The two developed methods were applied to Ajay catchment, in India, and KASILIAN, JAFARABAD, SHOURANDIKA catchments, located in Iran, and the results were compared to those obtained from the kinematic wave method. The efficiency coefficients for geometric method with b being 0.6 and for the NASH-TA method were 0.971 and 0.955, respectively. The efficiency coefficient for geometric method in cases of b=1, 1.5, 1.67 were 0.824, 0.484 and 0.161, respectively. The efficiency of the geometric method (b=0.6) and the NASH-TA method was satisfactory.

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APA: Copy

SABZEVARI, TOURAJ, & KARAMI MOGHADAM, MEHDI. (2018). ESTIMATION OF DIMENSIONLESS TIME-AREA DIAGRAM OF CATCHMENTS. WATERSHED ENGINEERING AND MANAGEMENT, 10(3 ), 489-494. SID. https://sid.ir/paper/234703/en

Vancouver: Copy

SABZEVARI TOURAJ, KARAMI MOGHADAM MEHDI. ESTIMATION OF DIMENSIONLESS TIME-AREA DIAGRAM OF CATCHMENTS. WATERSHED ENGINEERING AND MANAGEMENT[Internet]. 2018;10(3 ):489-494. Available from: https://sid.ir/paper/234703/en

IEEE: Copy

TOURAJ SABZEVARI, and MEHDI KARAMI MOGHADAM, “ESTIMATION OF DIMENSIONLESS TIME-AREA DIAGRAM OF CATCHMENTS,” WATERSHED ENGINEERING AND MANAGEMENT, vol. 10, no. 3 , pp. 489–494, 2018, [Online]. Available: https://sid.ir/paper/234703/en

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