Catchment and channel components of sediment runoff in river flows (granulometric approach)

IF 3.5 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Sediment Research Pub Date : 2024-04-01 DOI:10.1016/j.ijsrc.2023.11.001

Marina Shmakova

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Abstract

A model of the channel and catchment components of sediment runoff has been developed. The model makes it possible to estimate the intensity of redistribution of river and bottom sediment in the riverbed, the size distribution of deposited or migrating particles, the mass of particles in the riverbed and catchment components of sediment load, as well as the contribution of the catchment component. The model is based on the assessment of the transport potential of the watercourse and the dynamics of the curves of the granulometric composition of bottom sediment, and products of soil and channel erosion. This approach is focused on the steady flow movement without additional sources of tributary sediment, intensive abrasion of river banks, and products of anthropogenic load. Calculations based on the model applied to the Narva River showed that the contribution of the catchment component to the sediment flow of this watercourse after intense rain is approximately 98%. The obtained results are well confirmed by the weak dynamics of channel deformations in the studied part of the watercourse.

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河流中泥沙径流的集水区和河道成分（颗粒计量法）

已开发出泥沙径流的河道和集水区组成部分模型。通过该模型，可以估算河床和底泥重新分布的强度、沉积或迁移颗粒的大小分布、河床和集水区沉积物负荷的颗粒质量以及集水区的贡献。该模型基于对河道运输潜力的评估，以及底泥颗粒组成、土壤和河道侵蚀产物的动态曲线。这种方法的重点是在没有额外的支流泥沙来源、河岸密集磨损和人为负荷产物的情况下的稳定水流运动。根据应用于纳尔瓦河的模型进行的计算显示，暴雨过后，集水区对该河道泥沙流量的贡献率约为 98%。在所研究的河道部分，河道变形的微弱动态充分证实了所获得的结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Sediment Research 环境科学-环境科学

CiteScore

6.90

自引率

5.60%

发文量

审稿时长

74 days

期刊介绍： International Journal of Sediment Research, the Official Journal of The International Research and Training Center on Erosion and Sedimentation and The World Association for Sedimentation and Erosion Research, publishes scientific and technical papers on all aspects of erosion and sedimentation interpreted in its widest sense. The subject matter is to include not only the mechanics of sediment transport and fluvial processes, but also what is related to geography, geomorphology, soil erosion, watershed management, sedimentology, environmental and ecological impacts of sedimentation, social and economical effects of sedimentation and its assessment, etc. Special attention is paid to engineering problems related to sedimentation and erosion.