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Modeling of complex flooding and sedimentation events on the downstream portion of the Yellow River using a 1-D model

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Abstract

A river management assignment requires a good understanding of the river system. At present, river system modeling applications are used to understand a complex river system. The advantages of a relatively easy application and the reduced data requirement make 1-D models more suitable for river system modeling. As part of this research, the compatibility of the 1-D model was assessed on a complex river system in the downstream section of the Yellow River. The approach helps to understand the extent to which 1-D models can be applied to a complex river system. Most of the time, the complex river system was believed to be solved through a more advanced application. Mike Hydro Geographic Information System (GIS) component was used to process a Digital Elevation Model (DEM) to extract the cross section and the alignment of the river. The data on the modeling processes are a combination of observed data from government agencies and extracted from online sources, such as an Alaskan satellite facility. Model discharge outputs at Aishian and Lijin stations show good agreement between an observed and simulation event, which was supported by high values of performance indicators. On the other hand, the maximum suspended concentration simulated using the 1-D model was 30 kg/m3 on a single day. This value is nearly equal to the maximum average long-term suspended sediment concentration in the history of the Yellow River. Therefore, models, such as Mike 11, can be applied for an average load computation in any highly sediment concentrated rivers.

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Correspondence to Abebe Tadesse Bulti.

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Bulti, A.T., Dai, W. & Ding, M. Modeling of complex flooding and sedimentation events on the downstream portion of the Yellow River using a 1-D model. Model. Earth Syst. Environ. 8, 5193–5206 (2022). https://doi.org/10.1007/s40808-022-01446-y

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  • DOI: https://doi.org/10.1007/s40808-022-01446-y

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