Evaluating the performance of CCD Satellite Rainfall estimates over the Nile Basin
Abdel-Monim, Yehia; Doaa Amin, Yehia Kamal, Mohamed Elshamy, Mohamed Nour and Ashraf El‐Moustafa;
Abstract
Rainfall is probably the most important input to hydrologic models and the most uncertain of them
as well. The high uncertainty in rainfall estimate in general, and over the Nile basin in particular is
due to the lack of adequate surface‐based rainfall monitoring networks. Using satellite imagery
provides a solution to develop rainfall estimates over the Nile basin in light of the shortage of rain
gauge data. In this paper, the rainfall estimates from a 9yr (1998‐2006) continuous stream of realtime
satellite data from the European METEOSAT satellite positioned over Africa have been
evaluated through comparison with the gauge‐based CRU rainfall data. The satellite estimate is
based on the Cold Cloud Duration (CCD) technique utilizing the infra‐red band imagery (i.e. a single
channel) only. The common error measures Root Mean Squared Error (RMSE) and Mean Error (Bias)
were used in this study as they give together a good picture about the performance. The evaluation
is done on a monthly time step at a spatial scale of (50km x 50km).
as well. The high uncertainty in rainfall estimate in general, and over the Nile basin in particular is
due to the lack of adequate surface‐based rainfall monitoring networks. Using satellite imagery
provides a solution to develop rainfall estimates over the Nile basin in light of the shortage of rain
gauge data. In this paper, the rainfall estimates from a 9yr (1998‐2006) continuous stream of realtime
satellite data from the European METEOSAT satellite positioned over Africa have been
evaluated through comparison with the gauge‐based CRU rainfall data. The satellite estimate is
based on the Cold Cloud Duration (CCD) technique utilizing the infra‐red band imagery (i.e. a single
channel) only. The common error measures Root Mean Squared Error (RMSE) and Mean Error (Bias)
were used in this study as they give together a good picture about the performance. The evaluation
is done on a monthly time step at a spatial scale of (50km x 50km).
Other data
Title | Evaluating the performance of CCD Satellite Rainfall estimates over the Nile Basin | Authors | Abdel-Monim, Yehia ; Doaa Amin, Yehia Kamal, Mohamed Elshamy, Mohamed Nour and Ashraf El‐Moustafa | Issue Date | May-2013 | Conference | UNESCO-IHE Conference on new Nile perspectives scientific advances in the Eastern Nile Basin |
Attached Files
File | Description | Size | Format | |
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Evaluating the Performance of CCD Satellite Rainfall Estimates Over the Nile Basin.pdf | 414.09 kB | Adobe PDF | View/Open |
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