River and Reservoir Watch Version 3.7 This work and associated data are protected by a Creative Commons License. G. R. Brakenridge*
River Discharge and Reservoir Storage Changes Using Satellite Microwave Radiometry A. J. Kettner*
Lake Nasser Nile Center: 31.12  Long. S/N rating: Fair T. De Groeve, S. Paris**
GFDS Site Number 11842 Modis History Sudan Center: 21.63  Lat. S. Cohen***
GEE Time Lapse Learn more about this reservoir sq km WBM contributing area S. V. Nghiem****
Last measured: 27-Sep-20 Obtain Data *CSDMS/INSTAAR, University of Colorado
Status: 98.8% of maximum Status: 4 (1, low; 2, normal; 3, high; 4, very high)* **Joint Research Centre, Ispra, Italy
0.0 *See below for threshold definitions ***University of Alabama
Technical Summary ***JPL/Caltech
Annual Maximum
1998 99.9%
1999 99.7%
2000 100.0%
2001 99.6%
2002 99.1%
2003 98.5%
2004 97.8%
2005 95.8%
2006 97.4%
2007 99.7%
2008 99.9%
2009 99.0%
2010 97.0%
2011 97.3%
2012 95.8%
Recent part of record. Five-day forward moving average is applied. 10-day forward moving average is applied. 2013 95.9%
2014 98.3%
2015 97.9%
2016 96.0%
2017 97.1%
Frequency Analysis, 1998-2017
25 yr*
100.6%
10 yr*
100.0%
5 yr*
99.4%
1.5 yr*
97.5%
Mean
95.8%
*From Log Pearson III 
Thresholds (adjusted for each day of the year) 27-Sep-20
Complete record. Five-day forward moving average is applied <25th percentile Low, "1" 25th: 95.1%
25th-74th percentile Normal, "2" 75th: 96.9%
75th-90th percentile High, "3" 90th: 97.8%
>90th percentile Very high, "4"
Percentiles are for a fixed 10 year reference period (2003-2013)
Site statistics: noise*: 0.016 signal/noise: 4.3 signal**: 0.070
* average of daily signal change, 1998-2010. **range of signal, 2003-2007
Also provided below are G-REALM Height Variations from TOPEX/POSEIDON/Jason-1 and Jason-2/OSTM Altimetry
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 
with respect to a datum that is based on a single fly-over date of the Jason-2/OSTM mission.