عربي
Skip Navigation Links
UniversityExpand University
CollegesExpand Colleges
CentersExpand Centers
Admin. UnitExpand Admin. Unit
StaffExpand Staff
StudentsExpand Students
 
Skip Navigation LinksHome Research Research Papers Paper Description    
 
Skip Navigation Links.
 
Paper Description


Assessing the Potential of Landsat-7 Thermal Band for Monitoring Essential Water Quality Parameters; Case Study: Lake Nasser, Egypt


Authors: Ali El battay, Alaa El-Sadek and Mona Radwan
Abstract: Most applications using remote sensing tend to assess fresh water quality via regression models between in situ data and spectral bands. Suspended Sediment (Turbidity), Dissolved Oxygen and Temperature are common parameters derived from RS and recurrently used in WQI and/or TDML indicators. In this study a series of ETM+ Landsat images, thermal band, in combination with in situ measurement over 7 years, 2001 to 2007, were used over the northern part of Lake Nasser (Egypt) to develop a regression model linking thermal band to water surface temperature. Relationship between Water Surface Temperature and Dissolved Oxygen was then extracted statistically at surface and at 80% depth of water column. A second series of eighteen Landsat ETM+ thermal band images was tested then to produce temporal and spatial pattern changes in the above mentioned parameters over various months of 2001 to 2003 and proposed to be implemented as shown in four dates of 2012/2013. The results showed a good response of the developed semi-empirical model to describe qualitatively and quantitatively the spatio-temporal variation of water temperature and dissolved oxygen levels. Amid the fact that Landsat 7 images are SLC-OFF since late 2003, however, they are the only available in their category between 2003 and 2013 and their potential is very good to cover a large area such as Lake Nacer and to produce reliable and frequent measurements of two essential water quality parameters; temperature and DO. Overall, using RS water quality generated models offers a huge potential to monitor effectively a large water body such as lake Nasser and retrieve significant water quality/pollution related parameters.

KEYWORDS: landsat 7, thermal band, water surface temperature, dissolved oxygen, lake Nasser, regression model
Published in: International Journal of Geosciences and Geomatics, ISSN 2052-5591;Vol 2(Issue 2):Page 85 - 91
URL:
Copyright © 2010 Arabian Gulf University Contact: Tel:17239999, Fax:17272555 | Home | Location | site map| عربي |