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Icesat-derived water level variations of roseires reservoir (Sudan) in the Nile Basin

Duan, Zheng LU ; Bastiaanssen, W. G.M. and Muala, Eric (2013) 2013 33rd IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2013 In International Geoscience and Remote Sensing Symposium (IGARSS) p.2884-2887
Abstract

The information of water level variations in lakes and reservoirs is essential for many applications such as water resources management. The conventional in-situ measurements of water levels based on gauge station are often rarely available or difficult to be shared to the public especially for lakes in the developing countries and transboundary basins. Satellite altimetry provides an alternative solution to obtaining water level variations in lakes. In this study, the laser altimetry product GLAS/ICESat L2 Global Land Surface Altimetry (ICESat-GLA14) data was used to derive water levels in a narrow long-shaped reservoir in the Nile Basin, i.e. Roseires Reservoir in Sudan. A total of 19 water levels were derived from ICESat-GLA14 during... (More)

The information of water level variations in lakes and reservoirs is essential for many applications such as water resources management. The conventional in-situ measurements of water levels based on gauge station are often rarely available or difficult to be shared to the public especially for lakes in the developing countries and transboundary basins. Satellite altimetry provides an alternative solution to obtaining water level variations in lakes. In this study, the laser altimetry product GLAS/ICESat L2 Global Land Surface Altimetry (ICESat-GLA14) data was used to derive water levels in a narrow long-shaped reservoir in the Nile Basin, i.e. Roseires Reservoir in Sudan. A total of 19 water levels were derived from ICESat-GLA14 during the period 2003-2009. Compared with the in-situ measurements, all 19 ICESat-derived water levels had a R2 of 0.88 and RMSE of 138.80 cm. After excluding two water levels (occurred on June 21, 2004 and June 8, 2005) with very large standard deviation (> 1 m), other 17 ICESat-derived water levels were in excellent agreement with in-situ measurements with R2 of 0.99 and RMSE of 16.96 cm. In practical situation, the high standard deviation can be considered as an indicator for unreliable water level which is better excluded for further application. Two problematic water levels showed high overestimation of the in-situ measurements, and they occurred at the lowest water level situations and during rainy season. The exact reason for such high overestimation needs to be investigated in the future study.

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Please use this url to cite or link to this publication:
author
; and
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
altimetry, ICESat, lake and reservoir, Nile Basin, water level
host publication
2013 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2013 - Proceedings
series title
International Geoscience and Remote Sensing Symposium (IGARSS)
article number
6723427
pages
4 pages
conference name
2013 33rd IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2013
conference location
Melbourne, VIC, Australia
conference dates
2013-07-21 - 2013-07-26
external identifiers
  • scopus:84894254178
ISBN
9781479911141
DOI
10.1109/IGARSS.2013.6723427
language
English
LU publication?
no
id
890b3f81-b732-4cf7-9b3e-97e2b67a4e7f
date added to LUP
2019-12-22 20:36:09
date last changed
2022-02-01 02:42:43
@inproceedings{890b3f81-b732-4cf7-9b3e-97e2b67a4e7f,
  abstract     = {{<p>The information of water level variations in lakes and reservoirs is essential for many applications such as water resources management. The conventional in-situ measurements of water levels based on gauge station are often rarely available or difficult to be shared to the public especially for lakes in the developing countries and transboundary basins. Satellite altimetry provides an alternative solution to obtaining water level variations in lakes. In this study, the laser altimetry product GLAS/ICESat L2 Global Land Surface Altimetry (ICESat-GLA14) data was used to derive water levels in a narrow long-shaped reservoir in the Nile Basin, i.e. Roseires Reservoir in Sudan. A total of 19 water levels were derived from ICESat-GLA14 during the period 2003-2009. Compared with the in-situ measurements, all 19 ICESat-derived water levels had a R<sup>2</sup> of 0.88 and RMSE of 138.80 cm. After excluding two water levels (occurred on June 21, 2004 and June 8, 2005) with very large standard deviation (&gt; 1 m), other 17 ICESat-derived water levels were in excellent agreement with in-situ measurements with R<sup>2</sup> of 0.99 and RMSE of 16.96 cm. In practical situation, the high standard deviation can be considered as an indicator for unreliable water level which is better excluded for further application. Two problematic water levels showed high overestimation of the in-situ measurements, and they occurred at the lowest water level situations and during rainy season. The exact reason for such high overestimation needs to be investigated in the future study.</p>}},
  author       = {{Duan, Zheng and Bastiaanssen, W. G.M. and Muala, Eric}},
  booktitle    = {{2013 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2013 - Proceedings}},
  isbn         = {{9781479911141}},
  keywords     = {{altimetry; ICESat; lake and reservoir; Nile Basin; water level}},
  language     = {{eng}},
  month        = {{12}},
  pages        = {{2884--2887}},
  series       = {{International Geoscience and Remote Sensing Symposium (IGARSS)}},
  title        = {{Icesat-derived water level variations of roseires reservoir (Sudan) in the Nile Basin}},
  url          = {{http://dx.doi.org/10.1109/IGARSS.2013.6723427}},
  doi          = {{10.1109/IGARSS.2013.6723427}},
  year         = {{2013}},
}