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Satellite based water balance of the Nile River basin a multisensor approach
Date
2013-12-09
Author
Zaitchik, Benjamin F
Anderson, Martha C
Ozdogan, Mutlu
Yılmaz, Mustafa Tuğrul
Metadata
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Satellite-informed estimates of distributed hydrologic fluxes and storages in remote, ungauged, or contentious river basins is the subject of active research. Here we review recent developments in remotely sensed water flux and balance estimates for large basins, including the Nile River basin, and present results of a new analysis that applies TRMM, GRACE, and a Meteosat-based implementation of the ALEXI evapotranspiration algorithm to generate spatially and temporally distributed estimates of hydrologic fluxes and storages in the Nile basin. Results are evaluated using previous studies of the Nile water balance, historic river gauge data, and available in situ measurements of distributed fluxes. It is found that the independent estimates of precipitation, water storage changes, and evapotranspiration offered by TRMM, GRACE, and ALEXI, respectively, can be used to close the climatological water balance of the Nile River basin and critical Nile subbasins to first order, but that the technique has limitations at shorter time scales due to random error, at smaller spatial scales, due to resolution limitations, and in the characterization of systematic error due to limited availability of relevant in situ observations. The strengths and limitations of the analysis will be evaluated with respect to alternative methodologies and to resource information needs in the Nile basin.
Subject Keywords
Remote sensing
,
Hydrological cycles and budgets
,
Water management
,
Water budgets
URI
https://hdl.handle.net/11511/77868
Conference Name
American Geophysical Union Fall Meeting 2013 (9 - 13 Aralık 2013)
Collections
Department of Civil Engineering, Conference / Seminar
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B. F. Zaitchik, M. C. Anderson, M. Ozdogan, and M. T. Yılmaz, “Satellite based water balance of the Nile River basin a multisensor approach,” presented at the American Geophysical Union Fall Meeting 2013 (9 - 13 Aralık 2013), San Francisco, USA, 2013, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/77868.