EVALUATION OF FLOOD ZONING BY ROUGHNESS COEFFICIENT CHANGING CASE STUDY: ATRAK RIVER REACH IN NORTH KHORASAN PROVINCE

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EFTEKHARI A.H.; SALAJEGHE A.; HOSSEINI S.A.

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Journal: PHYSICAL GEOGRAPHY Year:2011 | Volume:4 | Issue:12 Page(s): 91-106

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Title

EVALUATION OF FLOOD ZONING BY ROUGHNESS COEFFICIENT CHANGING CASE STUDY: ATRAK RIVER REACH IN NORTH KHORASAN PROVINCE

Author(s)

EFTEKHARI A.H. | SALAJEGHE A. | HOSSEINI S.A. | Issue Writer Certificate

Keywords

MANING’S COEFFICIENT OF ROUGHNESSQ2

TINQ2

HEC-RAS MODELQ2

FLOODING ZONEQ2

HEC-GEORASQ2

Abstract

The Research Effect of This Maning’s Coefficient of Roughness on Flooding Area and Water Level Was Assessed. First, TIN Layer in Arc Map Was Prepared and Then HEC-GEORAS Extension Was Used to Provide Necessary Information Based on Cross sectional Data Then, The Maning’s Coefficient of Roughness for The Selected Reach of Arak River Was Determined Based on Field Works and Cowen Standard Tables. This Coefficient Was Then Calibrated Using HEC-RAS Model. Furthermore, 5, 10, 25 Percent of The Coefficient Variation Was Considered to Find Out The Effects on The Model. The Flooding Area and Waters Level in Each Cross Section Was Monitored in Each Case and Was Exported to GIS to Study The Flooding Area With Aid HEC-GEORAS Extension. The Results Indicate Increasing The Maning’s Coefficient Will Increase The Flooding Zone and Vice Versa. Also it Showed That Calibration of The Coefficient Has a Considerable Effect on Estimation Flooding Zone and Flood Characteristics. The Results Also Suggest That The Model Has The Highest Sensitivity to Maning’s Coefficient of Roughness.

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APA: Copy

EFTEKHARI, A.H., SALAJEGHE, A., & HOSSEINI, S.A.. (2011). EVALUATION OF FLOOD ZONING BY ROUGHNESS COEFFICIENT CHANGING CASE STUDY: ATRAK RIVER REACH IN NORTH KHORASAN PROVINCE. JOURNAL OF PHYSICAL GEOGRAPHY, 4(12), 91-106. SID. https://sid.ir/paper/184946/en

Vancouver: Copy

EFTEKHARI A.H., SALAJEGHE A., HOSSEINI S.A.. EVALUATION OF FLOOD ZONING BY ROUGHNESS COEFFICIENT CHANGING CASE STUDY: ATRAK RIVER REACH IN NORTH KHORASAN PROVINCE. JOURNAL OF PHYSICAL GEOGRAPHY[Internet]. 2011;4(12):91-106. Available from: https://sid.ir/paper/184946/en

IEEE: Copy

A.H. EFTEKHARI, A. SALAJEGHE, and S.A. HOSSEINI, “EVALUATION OF FLOOD ZONING BY ROUGHNESS COEFFICIENT CHANGING CASE STUDY: ATRAK RIVER REACH IN NORTH KHORASAN PROVINCE,” JOURNAL OF PHYSICAL GEOGRAPHY, vol. 4, no. 12, pp. 91–106, 2011, [Online]. Available: https://sid.ir/paper/184946/en

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