High-frequency monitoring and machine learning models for assessing synoptic variability of suspended sediment flow of a small urban river

Authors

DOI:

https://doi.org/10.34753/HS.2023.5.1.59
+ Keywords

suspended sediment flow, water turbidity, machine learning models, urban hydrology

+ Abstract

The article presents the results of high-frequency monitoring of sediment flow of the largest right tributary of the Moscow River within the city - the Setun River, carried out in 2020–2021 by automatic recorders of optical turbidity and water level. Several recordings were involved from November 16, 2019 to March 19, 2020 (recording frequency 10 minutes), from March 1, 2021 to April 2021 and from July 2021 to October 2021 (recording frequency 1 minute). Under conditions of high anthropogenic load, the average turbidity of the Setun River water reaches 100 mg/l, which is 3–4 times higher than background values. There is a correlation between turbidity and water flow rates, which increases with increasing time lag from 0 to 50 hours. Based on combining measurements of water turbidity with characteristics of water level and flow, precipitation, and air temperature, as well as derivatives from them, 5 machine learning models were configured to predict sediment runoff with a resolution of 30 minutes and 1 day. The best results were demonstrated by the recurrent neural network LSTM RNN for forecasting daily values of water turbidity: with a root-mean-square error of 10.8 NTU, the time and magnitude of local increases in the turbidity peak were correctly determined.

+ Author Biographies

Sergey R. Chalov

Doctor of Geography, Associate Professor of the Department of Land Hydrology, Faculty of Geography, Lomonosov Moscow State University

Vsevolod M. Moreido

Ph.D., Head of Laboratory, Senior Researcher, Department of River Basin Hydrology, Laboratory of Hydroinformatics, Water Problems Institute of the Russian Academy of Sciences

Irina S. Denisova

Postgraduate student, Department of Land Hydrology, Faculty of Geography, Lomonosov Moscow State University;

Engineer, Surface Water Department, Surface Water Modeling Laboratory, Water Problems Institute of the Russian Academy of Sciences

Ivan A. Solonikov

Master's student of the department. land hydrology, Faculty of Geography, Lomonosov Moscow State University

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Published

2026-05-13 — Updated on 2023-12-13

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Section

Methods, models and technologies

How to Cite

Chalov, S. R., Moreido, V. M., Denisova, I. S., & Solonikov, I. A. (2023). High-frequency monitoring and machine learning models for assessing synoptic variability of suspended sediment flow of a small urban river. Hydrosphere. Hazard Processes and Phenomena, 5(1), 59-74. https://doi.org/10.34753/HS.2023.5.1.59
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