| River and Reservoir Watch
Version 3.5 |
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This work and associated data are protected by a Creative Commons
License. |
G. R.
Brakenridge* |
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| River
Discharge and Reservoir Storage Changes Using Satellite Microwave Radiometry |
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A. J. Kettner* |
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Lake Nasser |
Nile |
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Center: |
31.12 |
Long. |
S/N rating: |
Fair |
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T. De Groeve, S. Paris** |
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| GFDS Site Number |
11842 |
Modis
History |
Sudan |
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Center: |
21.63 |
Lat. |
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S. Cohen*** |
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| GEE
Time Lapse |
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Learn more about this
reservoir |
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sq km |
WBM contributing area |
S. V. Nghiem**** |
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| Last measured: |
18-Jan-19 |
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Obtain Data |
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*CSDMS/INSTAAR, University of Colorado |
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95.9% |
of maximum |
Status: |
3 |
(1, low; 2, normal; 3, high; 4, very high)* |
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**Joint Research Centre, Ispra, Italy |
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*See below for threshold definitions |
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***University of Alabama |
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Technical
Summary |
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***JPL/Caltech |
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Annual Maximum |
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1998 |
99.3% |
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1999 |
100.0% |
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2000 |
99.3% |
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2001 |
98.9% |
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2002 |
98.9% |
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2003 |
98.2% |
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2004 |
97.2% |
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2005 |
95.0% |
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2006 |
96.4% |
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2007 |
99.5% |
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2008 |
99.2% |
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2009 |
98.0% |
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2010 |
96.4% |
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2011 |
97.6% |
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2012 |
95.1% |
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| Recent
part of record. Five-day forward moving average is applied. |
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2013 |
95.0% |
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2014 |
97.4% |
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2015 |
97.8% |
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2016 |
95.1% |
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2017 |
96.8% |
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Frequency Analysis, 1998-2017 |
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25 yr* |
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100.3% |
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10 yr* |
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99.6% |
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5 yr* |
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99.0% |
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1.5 yr* |
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96.9% |
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Mean |
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94.7% |
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*From
Log Pearson III |
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Thresholds (adjusted for each day of the
year) |
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18-Jan-19 |
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| Complete
record. Five-day forward moving average is applied |
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<25th percentile |
Low, "1" |
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25th: |
93.1% |
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25th-74th percentile |
Normal, "2" |
75th: |
95.9% |
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75th-90th percentile |
High, "3" |
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90th: |
96.4% |
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>90th percentile |
Very high, "4" |
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Percentiles are for a fixed 10 year
reference period (2003-2013) |
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| Site
statistics: |
noise*: |
0.016 |
signal/noise: |
5.1 |
signal**: |
0.083 |
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* average of daily signal change, 1998-2010. |
**range of signal, 2003-2007 |
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| Also
provided below are G-REALM Height Variations from TOPEX/POSEIDON/Jason-1 and
Jason-2/OSTM Altimetry |
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| The scale
is shown on the right axis. These are
relative lake height variations computed from TOPEX/POSEIDON (T/P), Jason-1
and Jason-2/OSTM altimetry |
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| with respect to
a datum that is based on a single fly-over date of the Jason-2/OSTM
mission. |
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