DEMS RESOLUTION EFFECT ON SCS CURVE NUMBER DERIVED THROUGH WI_CN METHOD BASED ON SATURATION EXCESS CONCEPT

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AZIZIAN ASGHAR; SHOKOOHI ALIREZA; AMIRI TOKALDANY EBRAHIM

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ISSN: 2588-4824

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Journal: Iranian Journal of Soil and Water Research Year:2015 | Volume:46 | Issue:2 Page(s): 331-342

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Title

DEMS RESOLUTION EFFECT ON SCS CURVE NUMBER DERIVED THROUGH WI_CN METHOD BASED ON SATURATION EXCESS CONCEPT

Author(s)

AZIZIAN ASGHAR | SHOKOOHI ALIREZA | AMIRI TOKALDANY EBRAHIM | Issue Writer Certificate

Keywords

DEM RESOLUTIONQ2

SCS CURVE NUMBERQ2

WI_CN METHODQ2

SEMI DISTRIBUTED MODEL: TOPMODELQ2

Abstract

The effects of DEM RESOLUTION on the curve number values as. Based on WI_CN METHOD is addressed in the present research. This method, due to a use of TOPMODEL’s excesses saturation concept, is considerably dependent on the topographic index and subsequently on DEM cell sizes. The results of WI_CN METHOD application in the Kasilian watershed for different DEM cell sizes indicated that the watershed averaged curve number in DEMs with resolutions of 50 and 300 meters amount to 59.8 and 71.8, respectively, which means when DEM RESOLUTION gets coarser the difference between WI_CN METHOD and common methods (derived CN using GIS and RS techniques) increases. For instance the maximum differences observed between the two methods (in 50 and 300 meter cell sizes) are 8.3% and 29.9%, respectively. Therefore, when making use of the saturation excess based methods for deriving curve number raster maps, especially in ungauged watersheds, DEM RESOLUTION effects should be defined with respect to data resolution.

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APA: Copy

AZIZIAN, ASGHAR, SHOKOOHI, ALIREZA, & AMIRI TOKALDANY, EBRAHIM. (2015). DEMS RESOLUTION EFFECT ON SCS CURVE NUMBER DERIVED THROUGH WI_CN METHOD BASED ON SATURATION EXCESS CONCEPT. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 46(2), 331-342. SID. https://sid.ir/paper/225554/en

Vancouver: Copy

AZIZIAN ASGHAR, SHOKOOHI ALIREZA, AMIRI TOKALDANY EBRAHIM. DEMS RESOLUTION EFFECT ON SCS CURVE NUMBER DERIVED THROUGH WI_CN METHOD BASED ON SATURATION EXCESS CONCEPT. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2015;46(2):331-342. Available from: https://sid.ir/paper/225554/en

IEEE: Copy

ASGHAR AZIZIAN, ALIREZA SHOKOOHI, and EBRAHIM AMIRI TOKALDANY, “DEMS RESOLUTION EFFECT ON SCS CURVE NUMBER DERIVED THROUGH WI_CN METHOD BASED ON SATURATION EXCESS CONCEPT,” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 46, no. 2, pp. 331–342, 2015, [Online]. Available: https://sid.ir/paper/225554/en

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