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Rainfall-runoff characteristics in a tropical forested catchment, Puchong, Selangor, Malaysia


Citation

Saito, Mariko and Tsujimura, Maki and Abu Bakar, Siti Nurhidayu (2023) Rainfall-runoff characteristics in a tropical forested catchment, Puchong, Selangor, Malaysia. Hydrological Research Letters, 17 (2). pp. 28-35. ISSN 1882-3416

Abstract

This study aims to clarify the contributions of pre-event water to storm runoff using environmental tracers (dis‐ solved inorganic ions and stable isotopes) in a tropical forested catchment in Puchong, Selangor, Malaysia. We performed intensive sampling campaigns of stream water and throughfall for two storm events in July and November 2018. The discharge showed a low peak of 0.13 mm/h in event 1, with 18 mm of total rainfall, whereas event 2, with 50 mm of total rainfall, showed a quick discharge peak of 1.17 mm/h and a slow recovery of 0.39 mm/h. The nitrate concentration in the stream water during event 2 was higher than that in event 1. The temporal variations in nitrate ions indicate that subsurface water provided a dominant storm‐ flow in event 2. Hydrograph separations using silicate as a tracer revealed that pre-event water was the dominant com‐ ponent of the storm hydrograph (58–98%). Our results sug‐ gest that pre-event water plays an essential role in storm runoff of headwaters in humid tropical regions.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Forestry and Environment
DOI Number: https://doi.org/10.3178/hrl.17.28
Publisher: Japan Society of Hydrology and Water Resources
Keywords: Hydrograph separation; Stable isotopes; Pre‑event water contribution; Metamorphic sedimentary rocks; Selangor; Malaysia; Clean water and sanitation; Climate action; Sustainable cities and communities
Depositing User: Mr. Mohamad Syahrul Nizam Md Ishak
Date Deposited: 27 May 2024 01:16
Last Modified: 27 May 2024 01:16
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.3178/hrl.17.28
URI: http://psasir.upm.edu.my/id/eprint/108962
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