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

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...

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Main Authors: Saito, Mariko, Tsujimura, Maki, Abu Bakar, Siti Nurhidayu
Format: Article
Published: Japan Society of Hydrology and Water Resources 2023
Online Access:http://psasir.upm.edu.my/id/eprint/108962/
https://www.jstage.jst.go.jp/article/hrl/17/2/17_28/_article
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spelling my.upm.eprints.1089622024-05-27T01:16:01Z http://psasir.upm.edu.my/id/eprint/108962/ Rainfall-runoff characteristics in a tropical forested catchment, Puchong, Selangor, Malaysia Saito, Mariko Tsujimura, Maki Abu Bakar, Siti Nurhidayu 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. Japan Society of Hydrology and Water Resources 2023 Article PeerReviewed 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 https://www.jstage.jst.go.jp/article/hrl/17/2/17_28/_article 10.3178/hrl.17.28
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description 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.
format Article
author Saito, Mariko
Tsujimura, Maki
Abu Bakar, Siti Nurhidayu
spellingShingle Saito, Mariko
Tsujimura, Maki
Abu Bakar, Siti Nurhidayu
Rainfall-runoff characteristics in a tropical forested catchment, Puchong, Selangor, Malaysia
author_facet Saito, Mariko
Tsujimura, Maki
Abu Bakar, Siti Nurhidayu
author_sort Saito, Mariko
title Rainfall-runoff characteristics in a tropical forested catchment, Puchong, Selangor, Malaysia
title_short Rainfall-runoff characteristics in a tropical forested catchment, Puchong, Selangor, Malaysia
title_full Rainfall-runoff characteristics in a tropical forested catchment, Puchong, Selangor, Malaysia
title_fullStr Rainfall-runoff characteristics in a tropical forested catchment, Puchong, Selangor, Malaysia
title_full_unstemmed Rainfall-runoff characteristics in a tropical forested catchment, Puchong, Selangor, Malaysia
title_sort rainfall-runoff characteristics in a tropical forested catchment, puchong, selangor, malaysia
publisher Japan Society of Hydrology and Water Resources
publishDate 2023
url http://psasir.upm.edu.my/id/eprint/108962/
https://www.jstage.jst.go.jp/article/hrl/17/2/17_28/_article
_version_ 1800721409992818688
score 13.211869

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