Satellite rainfall products and their reliability in the Blue Nile Basin
In the Upper Blue Nile (UBN) basin, there is very sparse and uneven distribution of ground-based meteorological stations which constrain assessments on rainfall distributions and representation. To assess the diurnal cycle of rainfall across the UBN basin, satellite observations from Tropical Rainfa...
| Main Authors: | , , , |
|---|---|
| Format: | Book Chapter |
| Language: | Inglés |
| Published: |
2014
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/71175 |
| _version_ | 1855541983226888192 |
|---|---|
| author | Fenta, A.A. Rientjes, T.H.M. Haile, Alemseged Tamiru Reggiani, P. |
| author_browse | Fenta, A.A. Haile, Alemseged Tamiru Reggiani, P. Rientjes, T.H.M. |
| author_facet | Fenta, A.A. Rientjes, T.H.M. Haile, Alemseged Tamiru Reggiani, P. |
| author_sort | Fenta, A.A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | In the Upper Blue Nile (UBN) basin, there is very sparse and uneven distribution of ground-based meteorological stations which constrain assessments on rainfall distributions and representation. To assess the diurnal cycle of rainfall across the UBN basin, satellite observations from Tropical Rainfall Measuring Mission (TRMM) were used in this study. Data of 7 years (2002–2008) of Precipitation Radar (PR) and TRMM Microwave Imager (TMI) were processed, with analyses based on geographic information system (GIS) operations, statistical techniques, and harmonic analysis. Diurnal cycle patterns of rainfall occurrence and rain rate from three in-situ weather stations are well represented by the satellite observations. Harmonic analysis depicts large differences in the mean of the diurnal cycle, amplitude, and time of the amplitude across the study area. Diurnal cycle of rainfall occurrence has a single peak in Lake Tana, Gilgel Abbay, and Jemma subbasins and double peaks in Belles, Dabus, and Muger subbasins. Maximum rain rate occurs in the morning (Gilgel Abbay, Dabus, and Jemma), afternoon (Belles, Beshilo, and Muger), and evening (Lake Tana and along the river gorges). Results of this study indicate that satellite observations provide an alternative source of data to characterize diurnal cycle of rainfall in data-scarce regions. We noticed, however, that there are a number of constraints to the use of satellite observations. For more accurate assessments, satellite products require validation by a network of well-distributed ground stations. Also, we advocate bias correction. |
| format | Book Chapter |
| id | CGSpace71175 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| record_format | dspace |
| spelling | CGSpace711752025-03-11T09:50:20Z Satellite rainfall products and their reliability in the Blue Nile Basin Fenta, A.A. Rientjes, T.H.M. Haile, Alemseged Tamiru Reggiani, P. satellite observation radar satellite satellite imagery meteorological stations river basins rain measurement remote sensing gis precipitation case studies In the Upper Blue Nile (UBN) basin, there is very sparse and uneven distribution of ground-based meteorological stations which constrain assessments on rainfall distributions and representation. To assess the diurnal cycle of rainfall across the UBN basin, satellite observations from Tropical Rainfall Measuring Mission (TRMM) were used in this study. Data of 7 years (2002–2008) of Precipitation Radar (PR) and TRMM Microwave Imager (TMI) were processed, with analyses based on geographic information system (GIS) operations, statistical techniques, and harmonic analysis. Diurnal cycle patterns of rainfall occurrence and rain rate from three in-situ weather stations are well represented by the satellite observations. Harmonic analysis depicts large differences in the mean of the diurnal cycle, amplitude, and time of the amplitude across the study area. Diurnal cycle of rainfall occurrence has a single peak in Lake Tana, Gilgel Abbay, and Jemma subbasins and double peaks in Belles, Dabus, and Muger subbasins. Maximum rain rate occurs in the morning (Gilgel Abbay, Dabus, and Jemma), afternoon (Belles, Beshilo, and Muger), and evening (Lake Tana and along the river gorges). Results of this study indicate that satellite observations provide an alternative source of data to characterize diurnal cycle of rainfall in data-scarce regions. We noticed, however, that there are a number of constraints to the use of satellite observations. For more accurate assessments, satellite products require validation by a network of well-distributed ground stations. Also, we advocate bias correction. 2014 2016-02-26T05:51:57Z 2016-02-26T05:51:57Z Book Chapter https://hdl.handle.net/10568/71175 en Limited Access Fenta, A. A.; Rientjes, T.; Haile, Alemseged Tamiru; Reggiani, P. 2014. Satellite rainfall products and their reliability in the Blue Nile Basin. In Melesse, A. M.; Abtew, W.; Setegn, S. G. (Eds.). Nile river basin: ecohydrological challenges, climate change and hydropolitics. Dordrecht, Netherlands: Springer. pp.51-67. |
| spellingShingle | satellite observation radar satellite satellite imagery meteorological stations river basins rain measurement remote sensing gis precipitation case studies Fenta, A.A. Rientjes, T.H.M. Haile, Alemseged Tamiru Reggiani, P. Satellite rainfall products and their reliability in the Blue Nile Basin |
| title | Satellite rainfall products and their reliability in the Blue Nile Basin |
| title_full | Satellite rainfall products and their reliability in the Blue Nile Basin |
| title_fullStr | Satellite rainfall products and their reliability in the Blue Nile Basin |
| title_full_unstemmed | Satellite rainfall products and their reliability in the Blue Nile Basin |
| title_short | Satellite rainfall products and their reliability in the Blue Nile Basin |
| title_sort | satellite rainfall products and their reliability in the blue nile basin |
| topic | satellite observation radar satellite satellite imagery meteorological stations river basins rain measurement remote sensing gis precipitation case studies |
| url | https://hdl.handle.net/10568/71175 |
| work_keys_str_mv | AT fentaaa satelliterainfallproductsandtheirreliabilityinthebluenilebasin AT rientjesthm satelliterainfallproductsandtheirreliabilityinthebluenilebasin AT hailealemsegedtamiru satelliterainfallproductsandtheirreliabilityinthebluenilebasin AT reggianip satelliterainfallproductsandtheirreliabilityinthebluenilebasin |