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

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SABZEVARI T.; NOROUZPOUR SH.; JAMISHI M.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: Journal of Water Resources Engineering Year:2014 | Volume:7 | Issue:22 Page(s): 37-50

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Information Journal Paper

Title

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

Author(s)

SABZEVARI T. | NOROUZPOUR SH. | JAMISHI M. | Issue Writer Certificate

Keywords

TIME-AREAQ2

INSTANTANEOUS UNIT HYDROGRAPHQ2

NASH MODELQ2

KASILIAN AND JAFARABADQ2

IRANQ2

AJAY AND GODAWRIQ2

INDIAQ2

Abstract

Runoff prediction in un-gauged catchments is of importance for designing hydraulic structures. Some rainfall runoff models such as Clark requires TIME-AREA diagram of catchments. In this study, a novel method to derive TIME-AREA diagram using Nash's INSTANTANEOUS UNIT HYDROGRAPH model is presented. This method was compared to TIME-AREA equation already introduced by USACE (1999). The values of parameters n and k were obtained as n=4.7 and k=te/7.4. The results were validated using the existing TIME-AREA diagrams in KASILIAN AND JAFARABAD, IRAN and AJAY AND GODAWRI, INDIA. Moreover, the time- area diagrams derived from the new method were converted to direct runoff hydrographs using Clark model. The hydrographs were compared with observed ones. The average efficiency coefficients for AJAY AND GODAWRI are 0.96 and 0.78, respectively. The errors in peak discharge estimation vary between 14 to 22 percent and 4 to 17.5 percent for Kasilian and Ajay, respectively.

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APA: Copy

SABZEVARI, T., NOROUZPOUR, SH., & JAMISHI, M.. (2014). DETERMINATION OF THE CATCHMENT'S TIME-AREA DIAGRAM BY USING NASH INSTANTANEOUS UNIT HYDROGRAPH TECHNIQUE. WATER ENGINEERING, 7(22), 37-50. SID. https://sid.ir/paper/169557/en

Vancouver: Copy

SABZEVARI T., NOROUZPOUR SH., JAMISHI M.. DETERMINATION OF THE CATCHMENT'S TIME-AREA DIAGRAM BY USING NASH INSTANTANEOUS UNIT HYDROGRAPH TECHNIQUE. WATER ENGINEERING[Internet]. 2014;7(22):37-50. Available from: https://sid.ir/paper/169557/en

IEEE: Copy

T. SABZEVARI, SH. NOROUZPOUR, and M. JAMISHI, “DETERMINATION OF THE CATCHMENT'S TIME-AREA DIAGRAM BY USING NASH INSTANTANEOUS UNIT HYDROGRAPH TECHNIQUE,” WATER ENGINEERING, vol. 7, no. 22, pp. 37–50, 2014, [Online]. Available: https://sid.ir/paper/169557/en

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