INVESTIGATING THE APPLICATION OF REMOTE SENSING BASED DEMS ON FOR INUNDATION MAPPING AND HYDRAULIC MODELING

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AZIZIAN A.

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Journal: IRAN-WATER RESOURCES RESEARCH Year:2018 | Volume:14 | Issue:2 Page(s): 212-223

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Title

INVESTIGATING THE APPLICATION OF REMOTE SENSING BASED DEMS ON FOR INUNDATION MAPPING AND HYDRAULIC MODELING

Author(s)

AZIZIAN A. | Issue Writer Certificate

Keywords

DIGITAL ELEVATION MODELS (DEMS)Q1

REMOTE SENSINGQ1

INUNDATED EXTENT AND HYDRAULIC MODELINGQ1

Abstract

Digital elevation models (DEMs) are one the most important inputs of hydraulic and hydrological models. Due to lack of high resolution maps, especially in regions where data is scarce, hydraulic modeling is a difficult and challenging task. In recent years, remote-sensing based DEMs are extensively used in several studies particularly hydraulic modeling due to ease of access and being free of charge. One of the most important questions in application of hydraulic models is the efficiency of these DEMs in flood simulation. This research focused on application of remote-sensing based DEMs, such as SRTM-30 and 90m, ASTER-30m and ALOS-30m DEMs, on the performance of HEC-RAS-1D model in two different rivers of Iran. The results showed that the accuracy of ALOS-30m DEMs in deriving geometric model and subsequently flood simulation was higher and more considerable than other DEM sources. For instance, the average relative error (RE) of using this valuable dataset in simulating inundated extents in Sarbaz and SojasRood rivers was lower than 13 and 9 %, respectively. In contrast, the results of ASTER-30m DEMs in both rivers was not satisfactory and the average RE of inundated extents was more than 38%. As an overall conclusion, one can deduce that ALOS-30m and ASTER-30m DEMs are the best and the worst datasets for deriving geometric model, flood inundation mapping and flood simulation. Hence, in areas with data scarcity or for underfunding projects, using ALOS-30m DEM especially in early design stages can be useful and more beneficial.

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APA: Copy

AZIZIAN, A.. (2018). INVESTIGATING THE APPLICATION OF REMOTE SENSING BASED DEMS ON FOR INUNDATION MAPPING AND HYDRAULIC MODELING. IRAN-WATER RESOURCES RESEARCH, 14(2 ), 212-223. SID. https://sid.ir/paper/100357/en

Vancouver: Copy

AZIZIAN A.. INVESTIGATING THE APPLICATION OF REMOTE SENSING BASED DEMS ON FOR INUNDATION MAPPING AND HYDRAULIC MODELING. IRAN-WATER RESOURCES RESEARCH[Internet]. 2018;14(2 ):212-223. Available from: https://sid.ir/paper/100357/en

IEEE: Copy

A. AZIZIAN, “INVESTIGATING THE APPLICATION OF REMOTE SENSING BASED DEMS ON FOR INUNDATION MAPPING AND HYDRAULIC MODELING,” IRAN-WATER RESOURCES RESEARCH, vol. 14, no. 2 , pp. 212–223, 2018, [Online]. Available: https://sid.ir/paper/100357/en

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