A semi-analytical optical remote sensing model to estimate suspended sediment and dissolved organic carbon in tropical coastal waters influenced by peatland-draining river discharges off Sarawak, Borneo
Coastal water quality degradation is a global challenge. Marine pollution due to suspended sediments and dissolved matter impacts water colour, biogeochemistry, benthic habitats and eventually human populations that depend on marine resources. In Sarawak (Malaysian Borneo), peatland-draining river d...
Saved in:
Main Authors: | , , , , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/151896 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-151896 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-1518962023-02-28T16:40:49Z A semi-analytical optical remote sensing model to estimate suspended sediment and dissolved organic carbon in tropical coastal waters influenced by peatland-draining river discharges off Sarawak, Borneo Cherukuru, Nagur Martin, Patrick Sanwlani, Nivedita Mujahid, Aazani Müller, Moritz Asian School of the Environment Science::Geology Tropical Coastal Waters Suspended Sediment Coastal water quality degradation is a global challenge. Marine pollution due to suspended sediments and dissolved matter impacts water colour, biogeochemistry, benthic habitats and eventually human populations that depend on marine resources. In Sarawak (Malaysian Borneo), peatland-draining river discharges containing suspended sediments and dissolved organic carbon influence coastal water quality at multiple locations along the coast. Optical remote sensing is an effective tool to monitor coastal waters over large areas and across remote geographic locations. However, the lack of regional optical measurements and inversion models limits the use of remote sensing observations for water quality monitoring in Sarawak. To overcome this limitation, we have (1) compiled a regional spectral optical library for Sarawak coastal waters, (2) developed a new semi-analytical remote sensing model to estimate suspended sediment and dissolved organic carbon in coastal waters, and (3) demonstrated the application of our remote sensing inversion model on satellite data over Sarawak. Bio-optical data analysis revealed that there is a clear spatial variability in the inherent optical properties of particulate and dissolved matter in Sarawak. Our optical inversion model coupled with the Sarawak spectral optical library performed well in retrieving suspended sediment (bias = 3% and MAE = 5%) and dissolved organic carbon (bias = 3% and MAE = 8%) concentrations. Demonstration products using MODIS Aqua data clearly showed the influence of large rivers such as the Rajang and Lupar in discharging suspended sediments and dissolved organic carbon into coastal waters. The bio-optical parameterisation, optical model, and remote sensing inversion approach detailed here can now help improve monitoring and management of coastal water quality in Sarawak. Ministry of Education (MOE) Published version This research was funded by the CSIRO Oceans and Atmosphere and the Regional Collaborations Programme (Australian Academy of Sciences). The Regional Collaborations Programme is supported by the Australian Government under the National Innovation and Science Agenda. PM was funded by a Tier 1 grant from the Singapore Ministry of Education’s Academic Research Fund (RG 175/16). MM and AM acknowledge funding support from the Sarawak Multimedia Authority under the Sarawak Digital Centre of Excellence. 2021-10-21T02:48:55Z 2021-10-21T02:48:55Z 2021 Journal Article Cherukuru, N., Martin, P., Sanwlani, N., Mujahid, A. & Müller, M. (2021). A semi-analytical optical remote sensing model to estimate suspended sediment and dissolved organic carbon in tropical coastal waters influenced by peatland-draining river discharges off Sarawak, Borneo. Remote Sensing, 13(1), 99-. https://dx.doi.org/10.3390/rs13010099 2072-4292 https://hdl.handle.net/10356/151896 10.3390/rs13010099 2-s2.0-85099454119 1 13 99 en RG 175/16 Remote Sensing © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). application/pdf |
institution |
Nanyang Technological University |
building |
NTU Library |
continent |
Asia |
country |
Singapore Singapore |
content_provider |
NTU Library |
collection |
DR-NTU |
language |
English |
topic |
Science::Geology Tropical Coastal Waters Suspended Sediment |
spellingShingle |
Science::Geology Tropical Coastal Waters Suspended Sediment Cherukuru, Nagur Martin, Patrick Sanwlani, Nivedita Mujahid, Aazani Müller, Moritz A semi-analytical optical remote sensing model to estimate suspended sediment and dissolved organic carbon in tropical coastal waters influenced by peatland-draining river discharges off Sarawak, Borneo |
description |
Coastal water quality degradation is a global challenge. Marine pollution due to suspended sediments and dissolved matter impacts water colour, biogeochemistry, benthic habitats and eventually human populations that depend on marine resources. In Sarawak (Malaysian Borneo), peatland-draining river discharges containing suspended sediments and dissolved organic carbon influence coastal water quality at multiple locations along the coast. Optical remote sensing is an effective tool to monitor coastal waters over large areas and across remote geographic locations. However, the lack of regional optical measurements and inversion models limits the use of remote sensing observations for water quality monitoring in Sarawak. To overcome this limitation, we have (1) compiled a regional spectral optical library for Sarawak coastal waters, (2) developed a new semi-analytical remote sensing model to estimate suspended sediment and dissolved organic carbon in coastal waters, and (3) demonstrated the application of our remote sensing inversion model on satellite data over Sarawak. Bio-optical data analysis revealed that there is a clear spatial variability in the inherent optical properties of particulate and dissolved matter in Sarawak. Our optical inversion model coupled with the Sarawak spectral optical library performed well in retrieving suspended sediment (bias = 3% and MAE = 5%) and dissolved organic carbon (bias = 3% and MAE = 8%) concentrations. Demonstration products using MODIS Aqua data clearly showed the influence of large rivers such as the Rajang and Lupar in discharging suspended sediments and dissolved organic carbon into coastal waters. The bio-optical parameterisation, optical model, and remote sensing inversion approach detailed here can now help improve monitoring and management of coastal water quality in Sarawak. |
author2 |
Asian School of the Environment |
author_facet |
Asian School of the Environment Cherukuru, Nagur Martin, Patrick Sanwlani, Nivedita Mujahid, Aazani Müller, Moritz |
format |
Article |
author |
Cherukuru, Nagur Martin, Patrick Sanwlani, Nivedita Mujahid, Aazani Müller, Moritz |
author_sort |
Cherukuru, Nagur |
title |
A semi-analytical optical remote sensing model to estimate suspended sediment and dissolved organic carbon in tropical coastal waters influenced by peatland-draining river discharges off Sarawak, Borneo |
title_short |
A semi-analytical optical remote sensing model to estimate suspended sediment and dissolved organic carbon in tropical coastal waters influenced by peatland-draining river discharges off Sarawak, Borneo |
title_full |
A semi-analytical optical remote sensing model to estimate suspended sediment and dissolved organic carbon in tropical coastal waters influenced by peatland-draining river discharges off Sarawak, Borneo |
title_fullStr |
A semi-analytical optical remote sensing model to estimate suspended sediment and dissolved organic carbon in tropical coastal waters influenced by peatland-draining river discharges off Sarawak, Borneo |
title_full_unstemmed |
A semi-analytical optical remote sensing model to estimate suspended sediment and dissolved organic carbon in tropical coastal waters influenced by peatland-draining river discharges off Sarawak, Borneo |
title_sort |
semi-analytical optical remote sensing model to estimate suspended sediment and dissolved organic carbon in tropical coastal waters influenced by peatland-draining river discharges off sarawak, borneo |
publishDate |
2021 |
url |
https://hdl.handle.net/10356/151896 |
_version_ |
1759855501168869376 |