dc.contributor.author |
Majozi, Nobuhle P
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dc.contributor.author |
Suhyb Salama, MHD
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dc.contributor.author |
Bernard, Stewart
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dc.contributor.author |
Harper, DM
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dc.contributor.author |
Habte, MG
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dc.date.accessioned |
2014-09-05T12:53:41Z |
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dc.date.available |
2014-09-05T12:53:41Z |
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dc.date.issued |
2014-05 |
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dc.identifier.citation |
Majozi, N.P., Suhyb Salama, M.H.D., Bernard, S., Harper, D.M. and Habte, M.G. 2014. Remote sensing of euphotic depth in shallow tropical inland waters of Lake Naivasha using MERIS data. Remote Sensing of Environment, vol. 148, pp 178-189 |
en_US |
dc.identifier.issn |
0034-4257 |
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dc.identifier.uri |
http://ac.els-cdn.com/S0034425714001114/1-s2.0-S0034425714001114-main.pdf?_tid=8677a7ca-2de5-11e4-8281-00000aab0f02&acdnat=1409142635_92ad89840a18624d92ceb06e56141ef3
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dc.identifier.uri |
http://hdl.handle.net/10204/7650
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dc.description |
Copyright: 2014 Elsevier. This is an ABSTRACT ONLY. The definitive version is published in Remote Sensing of Environment, vol. 148, pp 178-189 |
en_US |
dc.description.abstract |
Freshwater resources are deteriorating rapidly due to human activities and climate change. Remote sensing techniques have shown potential for monitoring water quality in shallow inland lakes, especially in data-scarce areas. The purpose of this study was to determine the spectral diffuse attenuation coefficient (K(subd)( )) of the water column, in order to map the euphotic depth (Z(subeu)) of Lake Naivasha, Kenya using the Medium Resolution Imaging Spectrometer (MERIS). Intensive in situ radiometric and limnological data collection was undertaken at Lake Naivasha. Atmospheric correction was done on the MERIS images using MERIS Neural Network algorithms, Case 2 Waters (C2R) and Eutrophic Lakes processors and the bright pixel atmospheric correction algorithm (BPAC). The Eutrophic Lakes processor gave the most accurate atmospherically corrected remote sensing reflectances at 490 nm compared to the other processors, with mean absolute percentage error (MAPE) of 47% and a root mean square error (RMSE) 43%, with BPAC giving negative reflectances in the blue spectral range. In situ K(subd) and Zeu models were calibrated and validated using above- and under-water radiometric measurements, and tested on the Neural Network atmospheric correction processed MERIS images. The Eutrophic Lakes estimates were the most accurate, with an RMSE of 0.26 m(sup-1) and MAPE of 18% for K(subd)(490) and RMSE of 0.17 m and MAPE of 14% for Z(subeu). The Z(subeu) maps produced from MERIS images clearly show the variation of euphotic depth both in space and time. These results indicate the suitability of MERIS to monitor euphotic depth and other water quality parameters of shallow inland water bodies. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier |
en_US |
dc.relation.ispartofseries |
Workflow;13278 |
|
dc.subject |
Lake Naivasha |
en_US |
dc.subject |
Euphotic depth |
en_US |
dc.subject |
Diffuse attenuation coefficient |
en_US |
dc.subject |
Remote sensing |
en_US |
dc.subject |
Medium Resolution Imaging Spectrometer |
en_US |
dc.subject |
MERIS |
en_US |
dc.title |
Remote sensing of euphotic depth in shallow tropical inland waters of Lake Naivasha using MERIS data |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Majozi, N. P., Suhyb Salama, M., Bernard, S., Harper, D., & Habte, M. (2014). Remote sensing of euphotic depth in shallow tropical inland waters of Lake Naivasha using MERIS data. http://hdl.handle.net/10204/7650 |
en_ZA |
dc.identifier.chicagocitation |
Majozi, Nobuhle P, MHD Suhyb Salama, Stewart Bernard, DM Harper, and MG Habte "Remote sensing of euphotic depth in shallow tropical inland waters of Lake Naivasha using MERIS data." (2014) http://hdl.handle.net/10204/7650 |
en_ZA |
dc.identifier.vancouvercitation |
Majozi NP, Suhyb Salama M, Bernard S, Harper D, Habte M. Remote sensing of euphotic depth in shallow tropical inland waters of Lake Naivasha using MERIS data. 2014; http://hdl.handle.net/10204/7650. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Majozi, Nobuhle P
AU - Suhyb Salama, MHD
AU - Bernard, Stewart
AU - Harper, DM
AU - Habte, MG
AB - Freshwater resources are deteriorating rapidly due to human activities and climate change. Remote sensing techniques have shown potential for monitoring water quality in shallow inland lakes, especially in data-scarce areas. The purpose of this study was to determine the spectral diffuse attenuation coefficient (K(subd)( )) of the water column, in order to map the euphotic depth (Z(subeu)) of Lake Naivasha, Kenya using the Medium Resolution Imaging Spectrometer (MERIS). Intensive in situ radiometric and limnological data collection was undertaken at Lake Naivasha. Atmospheric correction was done on the MERIS images using MERIS Neural Network algorithms, Case 2 Waters (C2R) and Eutrophic Lakes processors and the bright pixel atmospheric correction algorithm (BPAC). The Eutrophic Lakes processor gave the most accurate atmospherically corrected remote sensing reflectances at 490 nm compared to the other processors, with mean absolute percentage error (MAPE) of 47% and a root mean square error (RMSE) 43%, with BPAC giving negative reflectances in the blue spectral range. In situ K(subd) and Zeu models were calibrated and validated using above- and under-water radiometric measurements, and tested on the Neural Network atmospheric correction processed MERIS images. The Eutrophic Lakes estimates were the most accurate, with an RMSE of 0.26 m(sup-1) and MAPE of 18% for K(subd)(490) and RMSE of 0.17 m and MAPE of 14% for Z(subeu). The Z(subeu) maps produced from MERIS images clearly show the variation of euphotic depth both in space and time. These results indicate the suitability of MERIS to monitor euphotic depth and other water quality parameters of shallow inland water bodies.
DA - 2014-05
DB - ResearchSpace
DP - CSIR
KW - Lake Naivasha
KW - Euphotic depth
KW - Diffuse attenuation coefficient
KW - Remote sensing
KW - Medium Resolution Imaging Spectrometer
KW - MERIS
LK - https://researchspace.csir.co.za
PY - 2014
SM - 0034-4257
T1 - Remote sensing of euphotic depth in shallow tropical inland waters of Lake Naivasha using MERIS data
TI - Remote sensing of euphotic depth in shallow tropical inland waters of Lake Naivasha using MERIS data
UR - http://hdl.handle.net/10204/7650
ER -
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en_ZA |