Analysis of Trends in Rainfall, Runoff, and Suspended Sediment in The Eastern Region

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Published: Dec 25, 2025
Keywords:
Trend analysis, Rainfall, Streamflow, Suspended sediment

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Kamonvat Rittaphai
Department of Irrigation Engineering, Faculty of Engineering at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen Campus, Kamphaeng Saen, Kamphaeng Saen, Nakhon Pathom 73140, Thailand.
Tanatchaya Leawwattanasakul
Department of Irrigation Engineering, Faculty of Engineering at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen Campus, Kamphaeng Saen, Kamphaeng Saen, Nakhon Pathom 73140, Thailand.
Phatcharaphon Klinkhamdee
Department of Irrigation Engineering, Faculty of Engineering at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen Campus, Kamphaeng Saen, Kamphaeng Saen, Nakhon Pathom 73140, Thailand.
Chaiyapong Thepprasit
Department of Irrigation Engineering, Faculty of Engineering at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen Campus, Kamphaeng Saen, Kamphaeng Saen, Nakhon Pathom 73140, Thailand.

Abstract

This study aims to analyze and evaluate trends in rainfall, streamflow, and suspended sediment in the eastern region of Thailand. Hydrological characteristics and trend variations were examined across three-time scales: annual, rainy season, and dry season. The analysis utilized data from 16 rainfall stations, 37 streamflow stations, and 16 sediment monitoring stations. Three statistical methods were applied: Moving Average, Mann-Kendall trend test, and Linear Regression. The Moving Average method indicated an overall increasing trend in rainfall, while streamflow and suspended sediment exhibited decreasing trends. However, the Mann-Kendall and Linear Regression analyses did not reveal any statistically significant trends in rainfall, streamflow, or sediment load. The results of this study are significant for supporting effective water resource management and guiding sustainable planning in the future.

Article Details

Issue
Vol. 14 No. 3 (2025): Sep. - Dec. 2025
Section
Engineering

References

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