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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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Nainar, A. et al, 2017.pdfPublished version1.42 MBAdobe PDFView/Open
Title: Effects of different land-use on suspended sediment dynamics in Sabah (Malaysian Borneo) - a view at the event and annual timescales
Authors: Nainar, A
Bidin, K
Walsh, RPD
Ewers, RM
Reynolds, G
Item Type: Journal Article
Abstract: 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–2 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 understorey 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.
Issue Date: 7-Mar-2017
Date of Acceptance: 23-Jan-2017
URI: http://hdl.handle.net/10044/1/83283
DOI: 10.3178/hrl.11.79
ISSN: 1882-3416
Publisher: Japan Society of Hydrology and Water Resources (JSHWR), Japanese Association of Groundwater Hydrology (JAGH), Japanese Association of Hydrological Sciences (JAHS), and Japanese Society of Physical Hydrology (JSPH)
Start Page: 79
End Page: 84
Journal / Book Title: Hydrological Research Letters
Volume: 11
Issue: 1
Copyright Statement: © 2017 The Author(s). This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/ licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Sponsor/Funder: Rainforest Research Sdn Bhd
Funder's Grant Number: LBEE_P34395
Keywords: Science & Technology
Physical Sciences
Water Resources
suspended sediment
primary rainforest
logged forest
oil palm
land-use
land management
RAIN-FOREST
HEADWATER STREAMS
DANUM-VALLEY
BIODIVERSITY
TRANSPORT
GRADIENT
RECOVERY
IMPACTS
Science & Technology
Physical Sciences
Water Resources
suspended sediment
primary rainforest
logged forest
oil palm
land-use
land management
RAIN-FOREST
HEADWATER STREAMS
DANUM-VALLEY
BIODIVERSITY
TRANSPORT
GRADIENT
RECOVERY
IMPACTS
Publication Status: Published
Online Publication Date: 2017-03-07
Appears in Collections:Faculty of Natural Sciences



This item is licensed under a Creative Commons License Creative Commons