Effects of different land-use on suspended sediment dynamics in Sabah (Malaysian Borneo) – a view at the event and annual timescales
Suspended sediment concentrations (SSC) and the duration of high SSC are important for river ecology and water resource conservation. Using annual and storm-event datasets, this paper explores the hypothesis that key suspended sediment variables increase along a land-use disturbance gradient in hill...
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Japan Society of Hydrology and Water Resources
2017
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Online Access: | https://eprints.ums.edu.my/id/eprint/34540/1/Abstract.pdf https://eprints.ums.edu.my/id/eprint/34540/2/Full%20text.pdf https://eprints.ums.edu.my/id/eprint/34540/ https://www.jstage.jst.go.jp/article/hrl/11/1/11_79/_article https://doi.org/10.3178/hrl.11.79 |
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my.ums.eprints.345402022-10-28T00:53:07Z https://eprints.ums.edu.my/id/eprint/34540/ Effects of different land-use on suspended sediment dynamics in Sabah (Malaysian Borneo) – a view at the event and annual timescales Anand Nainar Kawi Bidin Rory P. D. Walsh Robert M. Ewers Glen Reynolds QH1-(199.5) General Including nature conservation, geographical distribution S1-(972) Agriculture (General) Suspended sediment concentrations (SSC) and the duration of high SSC are important for river ecology and water resource conservation. Using annual and storm-event datasets, this paper explores the hypothesis that key suspended sediment variables increase along a land-use disturbance gradient in hilly terrain in Sabah (Malaysian Borneo). Five small (1.7–4.6 km2) catchments of increasing disturbance history – primary forest, old growth virgin jungle reserve, twice-logged forest, multiple-logged forest and mature oil palm – were instrumented from late 2011 with dataloggers and sensors to record river stage, turbidity and rainfall. The oil palm catchment had 4–12 times greater mean discharge-weighted SSC (587 mg L-¹), annual sediment yield (1128 t km-¹ y-¹), median event peak SSC, and duration of SSC above 1000 mg L–1 than in the other catchments. The multiple-logged catchment (last logged around 2004) has SSC characteristics close to values for primary forest, possibly due to increased ground protection against erosion afforded by low understory regrowth and/or depletion of erodible sediment by multiple logging episodes. Results demonstrate that in hilly terrain even heavily logged rainforest has high value in safeguarding water quality and reducing erosion, whereas oil palm requires careful land management, especially of road runoff and ground cover. Japan Society of Hydrology and Water Resources 2017 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/34540/1/Abstract.pdf text en https://eprints.ums.edu.my/id/eprint/34540/2/Full%20text.pdf Anand Nainar and Kawi Bidin and Rory P. D. Walsh and Robert M. Ewers and Glen Reynolds (2017) Effects of different land-use on suspended sediment dynamics in Sabah (Malaysian Borneo) – a view at the event and annual timescales. Hydrological Research Letters, 11. pp. 79-84. ISSN 1882-3416 (E-ISSN) , 1882-3416 (P-ISSN) https://www.jstage.jst.go.jp/article/hrl/11/1/11_79/_article https://doi.org/10.3178/hrl.11.79 |
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QH1-(199.5) General Including nature conservation, geographical distribution S1-(972) Agriculture (General) Anand Nainar Kawi Bidin Rory P. D. Walsh Robert M. Ewers Glen Reynolds Effects of different land-use on suspended sediment dynamics in Sabah (Malaysian Borneo) – a view at the event and annual timescales |
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Suspended sediment concentrations (SSC) and the duration of high SSC are important for river ecology and water resource conservation. Using annual and storm-event datasets, this paper explores the hypothesis that key suspended sediment variables increase along a land-use disturbance gradient in hilly terrain in Sabah (Malaysian Borneo). Five small (1.7–4.6 km2) catchments of increasing disturbance history – primary forest, old growth virgin jungle reserve, twice-logged forest, multiple-logged forest and mature oil palm – were instrumented from late 2011 with dataloggers and sensors to record river stage, turbidity and rainfall. The oil palm catchment had 4–12 times greater mean discharge-weighted SSC (587 mg L-¹), annual sediment yield (1128 t km-¹ y-¹), median event peak SSC, and duration of SSC above 1000 mg L–1 than in the other catchments. The multiple-logged catchment (last logged around 2004) has SSC characteristics close to values for primary forest, possibly due to increased ground protection against erosion afforded by low understory regrowth and/or depletion of erodible sediment by multiple logging episodes. Results demonstrate that in hilly terrain even heavily logged rainforest has high value in safeguarding water quality and reducing erosion, whereas oil palm requires careful land management, especially of road runoff and ground cover. |
format |
Article |
author |
Anand Nainar Kawi Bidin Rory P. D. Walsh Robert M. Ewers Glen Reynolds |
author_facet |
Anand Nainar Kawi Bidin Rory P. D. Walsh Robert M. Ewers Glen Reynolds |
author_sort |
Anand Nainar |
title |
Effects of different land-use on suspended sediment dynamics in Sabah (Malaysian Borneo) – a view at the event and annual timescales |
title_short |
Effects of different land-use on suspended sediment dynamics in Sabah (Malaysian Borneo) – a view at the event and annual timescales |
title_full |
Effects of different land-use on suspended sediment dynamics in Sabah (Malaysian Borneo) – a view at the event and annual timescales |
title_fullStr |
Effects of different land-use on suspended sediment dynamics in Sabah (Malaysian Borneo) – a view at the event and annual timescales |
title_full_unstemmed |
Effects of different land-use on suspended sediment dynamics in Sabah (Malaysian Borneo) – a view at the event and annual timescales |
title_sort |
effects of different land-use on suspended sediment dynamics in sabah (malaysian borneo) – a view at the event and annual timescales |
publisher |
Japan Society of Hydrology and Water Resources |
publishDate |
2017 |
url |
https://eprints.ums.edu.my/id/eprint/34540/1/Abstract.pdf https://eprints.ums.edu.my/id/eprint/34540/2/Full%20text.pdf https://eprints.ums.edu.my/id/eprint/34540/ https://www.jstage.jst.go.jp/article/hrl/11/1/11_79/_article https://doi.org/10.3178/hrl.11.79 |
_version_ |
1760231309130596352 |
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13.160551 |