Universität zu Köln

Jiang, Cong ORCID: 0000-0002-2405-6645, Parteli, Eric J. R. ORCID: 0000-0003-1925-6412 and Shao, Yaping ORCID: 0000-0002-2041-5479 (2025). A Model for Regional‐Scale Water Erosion and Sediment Transport and Its Application to the Yellow River Basin. Journal of Advances in Modeling Earth Systems, 17 (5). pp. 1-27. Wiley. ISSN 1942-2466

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Abstract

On catchment scales, sediment discharge depends on both sediment transport capacity and sediment availability. The quantification of sediment discharge at the regional scales is important but is rarely adequately represented in regional hydrological models. Here, we introduce a regional water erosion and sediment transport model, Atmospheric and Hydrological‐Sediment Modeling System (AHMS‐SED). This model integrates the Atmospheric and Hydrological Modeling System (AHMS) with the improved CASCade 2‐ Dimensional SEDiment (CASC2D‐SED) model and incorporates gully erosion as a significant factor affecting sediment supply. A gully area index is introduced to quantify the fraction of the gully area and the enhancement of water erosion induced by concentrated flow in gullies. We use the AHMS‐SED to simulate the sediment processes in the Yellow River Basin from 1979 to 1987 at a 20 km resolution. We find quantitative agreement between the observations and model predictions for monthly sediment fluxes at five major hydrological stations along the Yellow River, with excellent performance metrics (modified Kling‐Gupta efficiency = 0.90, Nash– Sutcliffe model efficiency coefficient = 0.81) at the basin outlet. The results demonstrate the strong performance of the AHMS‐SED and the robustness of the sediment supply estimates. We also use AHMS‐SED to investigate how changes in climate and human activities affect sediment discharge in the Yellow River. The model shows that halving precipitation intensity substantially reduces sediment discharge, halving precipitation amount reduces it by 60%, and doubling irrigation reduces it by 10%

Item Type:	Article
Creators:	Creators Email ORCID ORCID Put Code Jiang, Cong UNSPECIFIED https://orcid.org/0000-0002-2405-6645 UNSPECIFIED Parteli, Eric J. R. UNSPECIFIED https://orcid.org/0000-0003-1925-6412 UNSPECIFIED Shao, Yaping UNSPECIFIED https://orcid.org/0000-0002-2041-5479 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-805276
Identification Number:	10.1029/2024MS004593
Journal or Publication Title:	Journal of Advances in Modeling Earth Systems
Volume:	17
Number:	5
Page Range:	pp. 1-27
Number of Pages:	27
Date:	30 May 2025
Publisher:	Wiley
ISSN:	1942-2466
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Institute for Geophysics and Meteorology
Subjects:	Earth sciences
Uncontrolled Keywords:	Keywords Language Development of the Atmospheric and Hydrological‐Sediment Modeling System for regional water erosion and sediment transport English Gully erosion plays a crucial role in sediment supply on the Chinese Loess Plateau English Global warming increases sediment discharge and enhanced irrigation increases sediment deposition in the Yellow River Basin English
['eprint_fieldname_oa_funders' not defined]:	Publikationsfonds UzK
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/80527